Th400 Gear Ratio Calculator

For example, if one gear with 13 teeth is driven by a gear with 21 teeth, the gear ratio is 1/1. These calculators are designed to give the approximate engine RPM (revolutions per minute) based on data entered. Miles per hour charts for toploader close and wide ratio. Watch as Performance Automatic explains the different speedometer gears for Turbo 350, Turbo 400, 700R4 and Ford applications. 76 low gear, the company's custom E9310 gearset (part number HP7469L, which includes a forged carrier housing and ring gear, 9310 pins and new washers and needle bearings) and one with 4140 gears (part number HP7479L, which includes an OEM carrier housing built with new washers and needle bearings). Drag Performance Calculator By AssassinRacing. Level 2 Perfromance Automatic Transmission by FTI®. Hi gents, possible already been covered but here goes. 79 mph Man, even if you had 10% slipage thru the automatic (all automatics without lockup converters will have some slippage), you'd still be over 80!!!!. A good RPM range for a V6 or V8 is 2200-2700. Keep in mind that 3,000 RPM is going to sound like your engine is roaring This is because your mom's car sounded like it was going to come apart at 4,500 and roared at 3,000 RPM. 48 first gear ratio but TCI and others makes a special planetary gear that will change this to a 2. Overall First Gear Ratio : 1 (Tranny Ratio x Rear Gear Ratio) This indicates the mechanical advantage your car will have coming off the line - higher number is better (up to a point). As of 12 Mar. Transmission If required, you can manually enter your transmission gear ratios in the fields below. For example, if we divide both terms in the ratio 3:6 by the number three, then we get the equal ratio, 1:2. A web based calculator to help you pick the right size tires, wheels, rear end, gear ratio and transmission for your 55-57 Chevrolet. 00 - Includes New 6L80E Transmission, Free Shipping (within mainland USA), 3 Year Nationwide Warranty, HD Torque Converter. This is useful as many Jeep enthusiasts do not want to lose the roadability of their vehicles. witch is the amount of lugs on the abs reluctor and also changed my gear ratio to 1. It has a ratio of 0. This is a fairly reasonable figure, but a lower crawl speed (numerically higher number) will effectively create a more capable 4x4 for low-speed. Was this site helpful?. One of a kind Chevy Nova with an all Aluminum 427 sporting aluminum heads, Holley 850 carburetor, turbo 350 automatic transmission with a 4500 stall speed converter, 3. Wallace Racing BACK to Calculators Speedo Gear Calculator. Or, change input variables (engine RPM, axle gear ratio and tire height) to determine vehicle speed in each forward gear. Calculator Use. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. An automatic transmission, also called auto, self-shifting transmission, n-speed automatic (where n is its number of forward gear ratios), or AT, is a type of motor vehicle transmission that can automatically change gear ratios as the vehicle moves, freeing the driver from having to shift gears manually. 84-inch-od. The car won't be as quick off the line because of the differences in the 1st gear ratio and without a lockup converter you'll want to keep the stall sane otherwise I would imagine you'd be in for a miserable drive. About the size of a cantaloupe, this one part creates all of the different gear ratios that the transmission can produce. 52:1, and 3rd Gear – 1. Several conversions relating to torque. To determine how fast I can go at my 6,400 RPM limit with 28" tall tires, I can do some simple math to calculate it with any gear ratio. Are we assuming you will be in top gear thru the traps? Can you shift thru all the gears in a mere 7. This happened in 1993 for trucks, vans, and SUVs, and 1994 for rear wheel drive passenger cars. Hughes offers 4 versions of this kit, one with 1. 7" od aluminum drums, xtra-lite maximum duty aluminum planetary carriers, super spr New Be the first to review this product. Gear Ratio Calculator. coa-21170 - "big dog" 400-xlt w/trans brake, xtra-lite high torque 6. Using the Ratio Calculator. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing. com, 1955 Chevy 1956 chevy 1957 Chevy Forum , Talk about your 55 chevy 56 chevy 57 chevy - Belair , 210, 150 sedans , Nomads and Trucks, Research, Free Tech Advice. So you had 3. As far as gearing: If I use a 700R4, first gear is 3. The PCM also monitors the turbine and output speed sensors to calculate gear ratio and the Transmission Range Sensor for gear selection. The TH700R4 was renamed "4L60" (RPO MD8) following the new General Motors naming convention, when the electronic version, 4L60E (RPO M30), was phased in. Re: gear ratio with 33\'s 4:10 with a 4 speed and 33's is a good combination. Tremec Web Site. Calculate the ratio of products between two shops. This gear set upgrades the C6 to wide ratio specifications changing the first gear ratio from 2. manufacturers high quality performance car parts, transfer cases, quick change gears, gear boxes, & more. 72:1 and second gear ratio from 1. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. Valve Bodies are the working brain of today’s automatic transmission. Using Drag Strip Analyzer my best gearing worked out using a stock geared th350 and a 4. If it rotates 3 3/4 turns, the gear ratio is 3. I will continue to look for that information and get back with you when I find it. The TH700R4 transmission was designed to replace the TH350 transmission. 4L80E vs TH400 Gearing. The TH700R4 was renamed "4L60" (RPO MD8) following the new General Motors naming convention, when the electronic version, 4L60E (RPO M30), was phased in. A clue: if you can get your fingers in between the bottom front of the trans case and the torque converter, before the 6 bellhousing bolts are in, it is not in all the way. Newbies tend to think, "okay, all I need is a huge motor, a manual transmission, some decent tires and a way to stop and I'll be good to go. We provide how-to and technical articles, vehicle and build features and examples, plus calculators and lookups that will help you get your ride from dream to driver. All my experience is with small block fords. Im wondering what gear ratio i should be working with if i want the truck to get closer to 70 mph and still be able to tow. Enter Diff + Gear Ratios and tire diameter, then drag RPM slider to calculate speed from RPM. 52:1, and 3rd Gear – 1. 48 is stock) low gear ratio. I wish I could remember where I found the information. Gear Ratio calculation in Planetary gearboxe. 43 1st gear ratios. The 1962-63 serial numbers are located on the front, right side of the differential carrier. This calculator assumes you know the vehicle's transmission ratio. But because you have a BBC I think you would be wise to look at a ALL GEAR valve body for the th400 from FTI if you intend to go with a 1+2. Here's an excellent link to a calculator page that is said to be the most accurate around. New Venture Gear was the somewhat unlikely merging of the two manual shift design & manufacturing divisions of General Motors and Chrysler Corp. It's running a 383 engine with 10. Right: the clutch eliminator installed right against the center support. 35/1 and retails for about $45 from your friendly GM dealer. Street tires are rated using three numbers for example 225/70R15 or 255/70/15. 84-inch-od. GM > Speedometer > Speedometer. 06 and a final of 0. If you take a few moments to study the gear chart for your transmission and rear end ratio combination you will see why this product is so popular. Miles per hour charts for toploader close and wide ratio. I wish I could remember where I found the information. Make Model Chassis Series Year Body Type Engine Codes Position. Gear Ratio and Tire Size Calculator - 4x4 and Jeep Ring & Pinion When you change your tire size you need to make sure you have the right gearing to get optimal fuel economy and power. By George Nenadovich. Does not Include: Dipstick, Torque Converter, Transbrake. Very minimal. 11 and highway cruising like a 2. Curious to hear what gears you guys are running in rigs that are primarily trail use. 73 Overall Top Gear Ratio 2. Buy PATC speedometer ratio adapter decrese 10%: Drive Gear - Amazon. Speedometer Gears from PATC for Dodge, Ford and GM. 1992-1993 T56 with the lower gear sets had a slightly lower torque capacity in the 350 lb-ft range while 1994-later (high) gear sets reduced the side loads on the case and were rated to 450 lb-ft. 2 th400 with 33 inch tires. Largest Main Shaft in the Industry. NOTE: see post below if interested why you spin a tire 1 rotation or 2 rotations. Hughes offers 4 versions of this kit, one with 1. Please post your drive terrain setup below. Some say it is stronger, some say it is weaker. tcsproducts. Hughes Performance HTMC34-1 GM TH400 Muscle Car Transmission Package Calculate. It's not as aggressive as the 4L60E though, which has a final gear ratio of. 3% slip with my 3. The advertised speeds are the theoretical speed and ignore the shift of the converter. Gear Star offers three power-output stages for refurbished TH350 transmissions, ranging from 400 hp/400 ft-lbs of torque to 500 hp/450 ft-lbs of torque to 700 hp/550 ft-lbs of torque. It becomes a vicious circle as you change components and swap rolling stock. These calculators are designed to give the approximate engine RPM (revolutions per minute) based on the ring gear and pinion gear ratio, the height of the tires (diameter from ground to top of the tire while mounted on the vehicle) and the transmission final gear ratio. Best Rear Gear Ratio for LS With 4L60E LS Installation Questions and Answers Best Rear Gear Ratio for LS With 4L60E - TriFive. Miles per hour charts for toploader close and wide ratio. That being said the NV4500’s most guys are perfectly happy with gear ratios of the NV4500 with the optional use of overdrive. This happened in 1993 for trucks, vans, and SUVs, and 1994 for rear wheel drive passenger cars. Or, change input variables (engine RPM, axle gear ratio and tire height) to determine vehicle speed in each forward gear. This Calculator gives you speed on each gear based on gear ratio, tire size and shifting rpm. 11 (rear axle=4. The frame is being cut down by at least 6. Forward Pattern. So if you have a tire that the manufacturer says measures 26", on your car it's more like 25. The first gear ratio of a TH-700R4 is 3. This takes all forms debt and divides it by the shareholders' equity. A TH350 and TH400 use the same gearset. 07 gear available on trucks instead of the 4. The most comprehensive gearing ratio is the debt-to-equity ratio. TH350 -- 35hp 700r4 -- 70hp 727 -- 40hp 904 -- 35hp E4OD -- 65hp If you have corrections, or gear ratios for other rear-wheel drive transmissions, please e-mail me with the info. Speedo Drive Gear Colours: The colour of the Drive Gear determines the number of Teeth it has. Speedometer Gear Calculator. Couture adds, “The 1986 Mustang SVO received a one-year-only 3. You can determine the gear. 30 rear gear isn’t going to put as much load against a converter in your average 3,000 pound car as a 3. Buy PATC speedometer ratio adapter decrese 10%: Drive Gear - Amazon. Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Select the value you want to solve for. Calculate your Rear End Gear Ratio Needed. I promise you that the next transmission I have to replace or any other person I hear of needing a transmission I will be heavily promoting Monster Transmission and tell them that I personally use Monster Transmission. I cant wait to try one of these. If you do not know this ratio, you can simply put in 1. I'm runng a 6bt with 4500 tranny. Custom tubular suspension systems with coil overs and rack and pinion steering. Gear, Shift Point and Speed Calculator This is a gear, speed and shift point calculator. 10, the engine speed will be approximately 2,984 rpm--(65 mph x 4. Customers who bought this item also bought. New to dragracing been a dirtracer 40 years would like advice on gear for my s15 gmc. If you are looking for help with restoring or hot rodding your chevy classic a good place to go for help is Chevy Talk my favorite forum is 1955-1957 ( Modified / pro street / show) forum. TECKPAK PIN EXTENDER FOR THE REVERSE SERVO PIN ON TH400/4L80E TRANSMISSIONS Transtar Part Number: T34913. The Automatic Transmission consisted of a 3-element hydraulic torque converter and compound planetary gear set. Same ratio as a TH350 and X. The 4L80E transmission was first introduced in 1991 and served as a replacement for the TH400 transmission. CVT & Dual Shaft Gear Transfer Case Listings (shown in bookmarks) Differential Listings (shown in bookmarks) Antique Section Domestic Manufacturers Asian & European Manufacturers Unless otherwise specified, years expressed in this catalog refer to the model year of the vehicle. Achieve ultra close ratio Turbo 400 ratios that rival those of a manual transmission with a new close ratio gearset from ATD. Gear Ratio Calculator. All options are listed, including prices and quantities shipped. 0:1 rear ratio. To determine how fast I can go at my 6,400 RPM limit with 28" tall tires, I can do some simple math to calculate it with any gear ratio. What Better Gear Ratios For TH400 To Get To Just 70MPH In A 1983 C20 4 Door Dually 454 Carburated. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot rod, street rod and towing. Enter the values on the left and press Compute, the gear calculator will take care of the rest. 55:1 rear-gear ratio, and a 20-tooth blue driven gear that’s designed to mesh with 1. Valve Bodies are the working brain of today’s automatic transmission. If you are changing the rear gear ratio, you will notice that the speedometer will not indicate the true speed. We’ve found when doing conversions from stick to automatic in high performance vehicles that these cars generally drop from a half to three quarters of. 11 and highway cruising like a 2. now it rips the tires, passing gear is a blast and kicks you back in the seat and it is ok to drive on the hwy. We'll work to keep you motivated and informed and with industry news, product information and reviews, event coverage, and well-curated articles and. 36, but they are very difficult to get, Yukon is the only one I can find that makes ths ratio in BOP, and they are back ordered for 2 months. 10, the engine speed will be approximately 2,984 rpm--(65 mph x 4. 059:1 while the 4L80e have the gear ratio of 2. In our example 225 is the Width in mm if the tire was measured from the bottom of bead to bottom of bead. To determine how fast I can go at my 6,400 RPM limit with 28" tall tires, I can do some simple math to calculate it with any gear ratio. 73 Overall Top Gear Ratio 2. 08: 40/13: XE: ZE: 1965. If you go to this page you can figure everything out. TH400 4L80E Super T-10 (2nd design) Forged 4340 Chrome Moly Fully Machined Steel - Maximum strength for extreme applications - Additional material in critical areas. See the chart below the table for typical ratios. 75 inch exhaust, Corvette. 10s that im rebuilding to go into my suburban, I'm still trying to decide whether 3. The ratio of the number of rotations of output gear to the number of rotations of input gear is called the gear ratio. Lenco Racing Transmissions celebrates over forty-five years of the engineering and manufacturing of the most successful drag racing transmissions ever built. From the World Cup Rally in the 70’s to SCORE and HDRA Championships in the 80’s and 90’s to overall wins of the Baja 1000 in 1997, 2001 and 2003. What Better Gear Ratios For TH400 To Get To Just 70MPH In A 1983 C20 4 Door Dually 454 Carburated. Even the old 6 speed F150 has a better overall gear ratio in 1st gear with only a 3. 86 and 2nd gear is 1) The goal is to trap close to peak HP RPM. From sheetmetal and exterior to the final interior touches. The 4L80E keeps doesn’t drop the engine rpm as much between shifts because it is a heavy duty transmission and assumes that you could very well be pulling a load. The smaller one is the driving gear and the larger the driven gear. I have been told by someone who currently owns two 343 X code 67 Americans that AMC used the 2. It is probably the strongest of the heavy duty four speeds and it is an excellent choice if you are converting to a. Maybe the following example will help you make sense of this. The close-ratio version of the Muncie 4-speed was RPO M21 and the heavy-duty close-ratio 4-speed was RPO M22. 10 ratio, the pinion diameter is dangerously low in my opinion. 2, divide by tire diameter. Numbers Matching 396 cui / 325 HP L35 engine. I have a gear ratio calculator with a good selection of transmissions and transfer cases. A few of the new features added with the 4L80E in comparison to its predecessor were electronic controls, overdrive capability, and a lock-up torque converter. The defaults show suggested values. Tuff Truck at the spanish fork arena. It has a ratio of 0. Overdrive can be an effective “go-to-gear” but choosing the right transmission with distinct and separate gear span ratio might be a better alternative while out on the trail. Gear Ratio Calculator. If you like this calculator use the Google +1 button: Listed below are some. 10:1, unless 27 inch or larger tires are installed. That will be the third rear end running under just this one particular truck. Remove Axle Retaining Bolt. This kit comes with all the hard parts necessary for the experienced professional to convert their very own 3-speed TH400 to a 2-speed high horsepower drag racing transmission! We rate kit HP2205 for up to 2,000 flywheel horsepower when used with good condition GM planetary gear sets, which will provide a 1. If the TH350 was spot-on, might as well use it for reference. By George Nenadovich. This form allows you to calculate final drive ratios as well as see a comparison of speeds and RPMs within operating ranges of the vehicle. Complete, ready-to-run, drop-in nodular iron case Ford 9-inch third member set up for 35-spline axles. Gear changes, transmission swaps and tire sizes. You need to know your rear end gear ratio. Every calculator I've seen gives different speedo gear advice than what GM used in a lot of cases. Remember there are variations in tyre sizes and wear will also affect actual readings so this is a guide only. The most comprehensive gearing ratio is the debt-to-equity ratio. Horsepower requirements for some transmissions. If you like this calculator use the Google +1 button: Listed below are some. The apple to total fruit ratio is 6 : 14, and the banana to total fruit ratio is 8 : 14. Would love to here some feedback on them from you guys. We’ve found when doing conversions from stick to automatic in high performance vehicles that these cars generally drop from a half to three quarters of. Not only will an Overdrive Transmission improve your performance, but it will reduce your fuel consumption by up to 33%. 0 rear gear ratio and 29. The advertised speeds are the theoretical speed and ignore the shift of the converter. I promise you that the next transmission I have to replace or any other person I hear of needing a transmission I will be heavily promoting Monster Transmission and tell them that I personally use Monster Transmission. The bigger the ratio number, the shorter the gear. Hughes Performance HTMC34-1 GM TH400 Muscle Car Transmission Package Calculate. Engine RPM, or the speed at which the engine turns, can be calculated at any speed given the vehicle's tire size, axle ratio, and final transmission gear ratio. The TH700R4 was renamed "4L60" (RPO MD8) following the new General Motors naming convention, when the electronic version, 4L60E (RPO M30), was phased in. Does any body have a chart that shows what color/tooth count coincides with what. Shooting for 800 rwhp soon. Even the old 6 speed F150 has a better overall gear ratio in 1st gear with only a 3. I'm runng a 6bt with 4500 tranny. As mentioned earlier, besides the engine’s ability to produce power, the weight, gear ratio, and tire height all play a role in what the converter’s stall speed needs to be. This eventually leads to a loss of 4th through 6th gears, and finally the loss of transmission function. Final gear is the gear inside your transmission on a rear wheel drive car. 5 inches to get it under the body and get the correct wheel base. A good RPM range for a V6 or V8 is 2200-2700. Take that same bowl of fruit with 6 apples and 8 bananas, 14 total pieces of fruit. 06 and a final of 0. That data consists of the ring gear and pinion gear ratio, the height of the tires (diameter from ground to top of the tire while mounted on the vehicle) and the transmission final gear ratio. Calculator Use. Payment Calculator The calculator provided below is a quick and easy tool to use to get an idea of what your monthly payment might look like. You will gain a little lower RPM's, but in my opinion, not enough to justify the expense of the swap. XX rear gear in first (Feels like a TH350 with x. Define gear. 5:1 compression, a Comp 292 cam (rough idling hot rod style cam), 4. The Turbo 400 is still regarded as one of the greatest transmissions ever developed, and even nearly half a century after its initial release, GM is still building the 4L85-E, a com­puter-controlled overdrive version of this transmission. GM is for original tire heights , you have to calculate it if your tires are different height, simple math, I just use the calculator, like I said, lazy. ) Tire Height - Please use Inches when measuring. The staff has been amazing to work with and takes care of their customers better than any other company I have ever dealt with. As far as gearing: If I use a 700R4, first gear is 3. Step 1: Create a table same as like above picture. I would say the best option is run the car first so we can kinda figure out the power your making, and then it would be easy to figure out the gear ratio you need with your current setup. That is of course with minimal tire spin. TCI COMPETITION TH400 TRANSMISSION FULL MANUAL REVERSE SHIFT TCI212000. 2004r speedometer driven gear housing 24RSDGH 2004R Billet Aluminum speedometer driven gear housing with new o-ring seal, lip seal, retainer and retaining bolt. 15 & 34 TH400 3L80 Speedo Setup Kit - Housing Gears Seals Retainers Speedometer. Chrome and brightwork are in good shape. I am not too thrillred about the 2:36 gear ratio. Differential Gear Ratio Calculator; Engine RPM Calculator; Ring Gear — Pinion Gear Ratio Calculator. Choosing the Correct Gear Ratio Always calculate your gear needs when changing rear tire sizes. This chart has been revised with actual ratios. We'll assume you have a "normal" Chevy TH350 with the small extension-housing hole, a 3. 52 first gear with 3. Does anyone have a gear ratio calculator handy? I need to do some rev vs speed calculations. They look cool and have the potential of being very functional, but they may also be robbing you of power/gas mileage. Once you have input all the data, you can compare what different axle gears will do, it will give you highway speeds at certain RPMs and what RPMs you should have at a. If this is a good differential, I’d just as soon use it. A good way to calculate this is to multiply. It's running a 383 engine with 10. See the chart below the table for typical ratios. The wide-ratio Muncie M20 was available with any of the high-performance engines, except the L78 and Z28 in 67 only came with the M21. The first is known as the input shaft speed (ISS) sensor. 2, divide by tire diameter. Using Drag Strip Analyzer my best gearing worked out using a stock geared th350 and a 4. 15 & 34 TH400 3L80 Speedo Setup Kit - Housing Gears Seals Retainers Speedometer. That would be about as perfect as you could get. engine came with a higher lift and longer duration cam, dual snorkel intake system with a “5. The lines of the body and seams of the door are very straight and solid. Use our simple Gear Ratio Calculator to quickly find the correct gear ratio for your ring and pinion gear set. Working out the tooth counts for planetary gears is actually not that complicated, so I initially neglected to mention how to do it. advanced-ev You can then figure out what gear ratio and tire size. 00: Third gear on cluster has 25 teeth: 1: 2. 86 and 2nd gear is 1) The goal is to trap close to peak HP RPM. So you had 3. If you are into formulas, you can calculate the correct gear as follows: - Count the teeth on the speedo drive gear, the one mounted on the transmission output shaft - Determine your. gear ratio would normally be 1:1) [12]. The defaults show suggested values. You bring the gumption. Newbies tend to think, "okay, all I need is a huge motor, a manual transmission, some decent tires and a way to stop and I'll be good to go. This chart is particularly useful when used in conjunction with an engine's power and torque data - showing what the rpm drop is in each gear when shifted at a specific engine rpm. If you would like to find a value other than speed, fill in information for all the boxes and clear the value in box you would like an answer for. In addition to determining the calories needed to maintain weight, use this as a calorie burner calculator and figure out how many calories you need to burn in order to drop pounds. Step 1: Create a table same as like above picture. The program will compute the best driven gear given a particular drive gear, or the best drive gear given the driven gear value. This means using a larger Driven Gear. 2004r speedometer driven gear housing 24RSDGH 2004R Billet Aluminum speedometer driven gear housing with new o-ring seal, lip seal, retainer and retaining bolt. 10:1, unless 27 inch or larger tires are installed. The Purpose of this page is to give you a quick reference listing of the gear ratios used in the various models of the Z Car. 42 Tooth Speedometer Driven gear 1362049 for 700R4, TH400, NP208, and TH350 type with a 2” speedometer hole. The higher the number, the lower the ratio: a 5. 1) Gear Ratio 2) Tire Size (possibly include type of tire as weight can effect decision) 3) Tranny Type 4) Optional if known- Gas Mileage This is also a very helpful link that is overlooked. The calculation is so simple it's funny, and the fact that the someone did the leg work on the corresponding charts is excellent. Make Model Chassis Series Year Body Type Engine Codes Position. The driven gear is positioned in a removable housing that is typically located in the transmission's tailhousing. 54:1 for a brutal increase in torque multiplication for faster acceleration in first and second gears. A clue: if you can get your fingers in between the bottom front of the trans case and the torque converter, before the 6 bellhousing bolts are in, it is not in all the way. It has to do with downshifting into the lowest selectable gear at some speed as the car goes through the sound traps. 10s that im rebuilding to go into my suburban, I'm still trying to decide whether 3. Enter the tire size diameter and the target vehicle speed in MPH. 00: Third gear on cluster has 25 teeth: 1: 2. This is 21% lower than the first gear ratio in a TH-350 ( 2. The Allison 1000 5 speed (2001-2005 model years) and 6 speed (2006+ model years) transmissions have been offered mated to the 6. Has a 406 small block edelbrock performer aluminum heads stock out of box,12. NOTE: see post below if interested why you spin a tire 1 rotation or 2 rotations. Enter Diff + Gear Ratios and tyre diameter, then drag RPM slider to calculate speed from RPM. High Altitude Emission Equipment (NA6) Alternate emission equipment installed for vehicles operating at high altitudes. Given a few bits of information on your drivetrain and tires it will computer shift points, max RPM. This eventually leads to a loss of 4th through 6th gears, and finally the loss of transmission function. If you are looking for help with restoring or hot rodding your chevy classic a good place to go for help is Chevy Talk my favorite forum is 1955-1957 ( Modified / pro street / show) forum. Rear end gear ratio. In the next month or so I will be swapping both axles to get the lower ratio I want from my suburban parts truck now that I am running taller tires. 0 for high gear in the TH400/TF727/ and most manual trannies without overdrive) x Ring and Pinion gear ratio (4. I have a dana 60 and 14 bolt ff rear with 4. This is a much lower ratio than what was common, and provides good acceleration from a stop and is also good for off-road driving. What do you guys think? 3. Since the time of the build, this car has about 2400 miles on it. If you stayed with the TH400 it would take a differential gear around 3. 70:1 will reduce engine rpm by 30 percent, while the. Below is a guide to help decipher it's meaning. The heavier a car is, the more load it will put on the torque converter when power is applied, causing it to flash at a higher speed. 86 and 2nd gear is 1) The goal is to trap close to peak HP RPM. Would love to hear input. Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Select the value you want to solve for. Are you searching for Speedometer Adapter online? Find Speedometer Adapter on sale here with the biggest variety of Speedometer Adapter anywhere online. Achieve ultra close ratio Turbo 400 ratios that rival those of a manual transmission with a new close ratio gearset from ATD. Conduct the 10 mile test, remove driven gear (the gear that spins your cable), count the teeth, and then multiply the teeth times the subtraction answer from the test. ) Tire Height - In Inches, Use The Gear Calculator or Tire Size Calculator Speedo Revs/Mile - Number of RPM the speedometer needs to turn at 60mph You can hit the SAMPLE button to see how some typical calculations will look. what is gear ratio & how it can calculate. ) Tire Radius= Distance, in inches, from the center of the tire to the ground. Enter the values on the left and press Compute, the gear calculator will take care of the rest. Trucks back then had a wide variety of optional gear ratios you will have to get underneath and have a look lift the rear end and spin the rear wheels together, and count the number of times the driveshaft turns. Welcome to Bowtie Overdrives, home of the worlds finest GM Automatic Overdrive Transmissions. The transmission speed sensors are used to calculate the actual gear ratio of the transmission while in use. 286 ratio brings the same close ratios found in a close ratio Muncie to your automatic. Here is how this works. CK has been great with the 2004R and now is offering a close ratio gear set for the 4L60's. How do I request a Price Match?. Pontiac Rear End Gear Codes; Year: Model: Rear Gear: Teeth Count: Standard Code: Locking Code: 1965: GTO: 3. GM > Speedometer > Speedometer. If you are into formulas, you can calculate the correct gear as follows: - Count the teeth on the speedo drive gear, the one mounted on the transmission output shaft - Determine your. 48 is stock) low gear ratio. By The Numbers. 0 rear gear ratio and 29. If you are into formulas, you can calculate the correct gear as follows: - Get your tire rev/mile from your tire manufacturer. To use the Gear/MPH. How will the 1st gear ratio work with my rear-end gear? The 1st gear is also very important to consider. Gear RatioWhat type of tranny (and its gear ratios), rear gear ratio, and tire size: This is required to calculate the actual output gear ratios (overall ratios in the respective gears), engine. Ring-and-pinion selection made easy! Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Just type in your info (example: 5000 RPM), press calculate, and you'll get the right ratio without the guesswork. You can try various combinations to come up with an appropriate combination of ring and pinion gear ratio and tire diameter for your vehicle. Painted Factory Garnet Red (code 52). Calculator for the right gear ratio on the speedometer.