3.08 gears, which is perfect for an X-15 Cummins running in double . The aftermarket has responded to this by offering a plethora of ratios ranging from 2.91 to 6.50:1. . The chart is based on RPM levels at 65 mph (105 kph) and a drive train running at a 1:1 gearing ratio, meaning the transmission and transfer case are passing power straight through at a one to one ratio without reducing or overdriving the engines rotations per minute before it reaches the differential. Keep in mind that our calculator does NOT take into account drive train loss, road and weather conditions, or the skill of the driver. A Simple Formula. Most differentials nowadays will have a sticker on the outside with axle ratio information. Discussion in '1st Gen. Tacomas (1995-2004 . ford 9 inch rear end gear ratios chart. The late '52 to '54 rear ends were Dana 44's. The same Dana rear end found in modern Vipers and throughout all the Mopar muscle cars. With a 3.36 rear gear ratio that puts the final drive at 8.46. The following table shows the various Ford part numbers and gear ratios for the matched ring and pinion gear sets used on 1928 through 1934 Model A (103-1/2" WB) and Model B (106" WB) Ford car and commercial chassis, not trucks. liquor store inventory cost. Save yourself the headache and let us figure out your ring-and-pinion gear ratio! I like that a lot. ford 9 inch rear end gear ratios chart ford 9 inch rear end gear ratios chart. Identification From Axle Tag: The axle tag is bolted to the rear differential cover, and is held on with one of the cover bolts. chris4x4, May 26, 2015 #17. A gear ratio of 3.55 means that the number of teeth on the ring gear is divided by the number of teeth on the pinion to give the ratio 3.55. 10 SPLINE POSTER Download the PDF for quick reference. How To Choose The Gear Ratio Based on Speed When selecting a Gear Ratio, you need the following information: 1. The most common code for this is "17." The next step would be to look at the tag on the rear end to see if the ratio matches the code on the door tag --if the tag is still attached to one of the (10) studs that holds the 3rd member to the rear end housing. Figure I below is a chart of rear wheel torque increases; to find the torque . A vehicle's rear axle ratio is numerically expressed. Then the formula would be calculated as: (38*3.91)/30 giving you 4.95. Step 6. Category: Date Codes and Casting Numbers. This calculator will help your hot rod or street machine get to the next level without red-lining your engine. The overall First gear ratio with the TH400 and 4.10:1 rear gear would be 2.48 x 4.10 = 10.168:1. Put the transmission in neutral and spin the rear wheels. As you can see, for the gear ratio of 9.176 the maximum vehicle speed is below initial target of 180 kph. A higher number denotes a lower ratio. If you are using the calculated diameter, multiply that number by .97 to get a more accurate reading. From the measly 2.26:1 gear found in some of the first years of the Fox Body Mustang to the 3.73:1 ratio found in some of the most current performance models, Ford has offered factory gear choices to fit almost every driving style! Final Transmission Ratio 3. Example: If the drive shaft spins 3.5 times to one tire revolution, the ratio would be close to 3.55; 4 times is 4.10; 3 and 3/4 times is . If you have installed larger tires, they rob performance, and you would want to go to a lower ratio like a 4.56 or 4.88 depending upon your tire diameter. In some cases both an 'A' and a 'B' prefix part number are shown for a particular gear set. +1 (310) 361-0020. This chart applies to all Ford non-overdirve transmissions, manual and automatic. In this video I break down in great detail the speed at which your car will be going for every 500 engine RPM with each typical rear gear ratio for each gear. Example: Ring Gear / Pinion Gear = Ratio Find all of the gear ratios available for your vehicle in our Application Guides or call our staff of differential experts at (800) 510-0950 for LIVE help. Back to Top 1958-1970 Chevy Rear Differential code Identification. If it turned 4 and a quarter times, it's a 4.25:1 ratio. Component Breakdown Axle Ratio. Locate the VIN Code: First and foremost, you need to find where the VIN code of your vehicle is at. There is a gear ratio stamped on the tag. So then if a three speed over drive tyranny replaces a standard three then it powers a 3.73 axle. The more torque you have can help with that number. Select the value you want to solve for. To my limited knowledge, that would be a sweet setup, then put a 230 in front. There is a gear ratio stamped on the tag. The Ford 9 inch rear end also has the widest variety of ratios on the market, Particularly in the 3.0:1 to 5.0:1 range. 0. gear ratio: The number of rotations of the crank arms per revolution of the rear wheel. Tyre diameter is automatically calculated from tyre profile info e.g. 2.64 gears; 62 mph=1390 rpm, 65 mph=1450 rpm, 70 mph=1625 rpm. Turn the wheel TWO revolutions and count the number of driveshaft turns. The conventional ratio for a 3 speed tyranny in a 1954 auto was 3.73. Generally tires squat about 3%. come dine with me brighton 2018 Par Publié le Juin 6, 2022. The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. If you are measuring your tire, measure from flat ground up to the center of the hub and multiply that number by 2. For the Tire Height field, enter . The rear end axle is responsible for transmitting power to the rear . Rear Axle Gear Ratio: Tire Diameter : 24" 26" 28" 30" 32" 34" 36" 38" 40" 42" 44" 2.18: 1831: 1690: 1570: 1465 . Q#tbm=isch&q=rear+differential+planetary+gear . Divide the New Tire Height (measured in inches or CM) by the Old Tire Height, then Multiply by the Original Gear Ratio: New Tire Height / Original Tire Height X Original Ratio = Return to Stock Ratio. For maximum performance with less converter slip at the lockup point, your converter's stall speed should stall close to these figures. Therefore, this implies that a ring gear with 41 teeth and a pinion with ten teeth results in 4.10:1. (.12 X 38" = 4.56) The below table can be used to get a rough idea on gear ratios. Impreza AWD 93-01 Auto 2.2L are 4.111. That had less spline count in the diff side, where the hub side remain the same spline count. If you run the east coast mainly then 65 if you run out west allot the 70 or 75 in the sweet spot. Using the chart, first determine what your original gear ratio and tire size are, then follow the lines to find your approximate RPM at 65 MPH. For example, if it turned 3 and a half times, it's a 3.50:1 ratio. Enter transmission and rear tyre data in the yellow boxes. My guess is the truck likely has a 3.25:1 rear gear ratio. 2.47 gears; 55 mph=1200 rpm, 60 mph=1280 rpm, 65 mph=1375 rpm. Chevy rear end gear ratio chart. A higher number denotes a lower ratio. . For instance, changing from a 2.41:1 ratio to a 3.73:1 ratio will provide a rear wheel torque increase of 55%. Enter the tire size diameter and the target vehicle speed in MPH. 1986-14 Mustang 8.8 Rear End Gear Kits. In fact, the Ford F-150, which is considered the best-selling truck of all time, offers trucks with a 3.15:1 ratio at the lowest end of the spectrum. From the example above, you can see that the lower line shows the gear ratio, and axle diameter. Front Axle Codes. Jump on Board. This ratio refers to the number of teeth on the ring - i.e., driven gear - divided by the number of teeth on the pinion - i.e., the drive gear. Jul 16, 2015 at 7:30 AM #18 #18. . Axle ratio or rear end gear ratio is calculated by dividing the number of teeth on the ring gear by the number of teeth on the pinion gear. Positraction 4-Speed (396/427) Note: All 1965-67 Corvette rear axles were manufactured at Warren and are suffixed "W". $289.99. You plan on moving up to 38". These are 3.08 gears. 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. For Hydramatic trannies, I think the ratio was 3:08. For better accuracy, turn the wheel 20 times and divide by 2 for . Recalculate the maximum vehicle speed using equation (11) and round towards nearest integer. Enter the number of teeth on your ring and pinion gear set to find the gear ratio. Partager . These calculations are assuming a manual transmission with a 1:1 ratio. Want to search for rear end parts by application, ask the Gear Wizzard Scroll through the list of popular transmissions to find yours. Your axle ratio, transmission ratios, and even tire diameter all factor in, so be sure to look at the big picture. Just type in your info (example: 5000 RPM), press calculate, and you'll get the right ratio without the guesswork. That way you don't have to take apart a differential and manually count the teeth on the gears just to calculate . (800) 510-0950. . Ring-and-pinion selection made easy! The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. Don't let scams get away with fraud. Back to Top. brighton suites rehoboth beach, de. Pick the tire hiegth, pick your gear ratio. Rear diffs are two different version from early to late models. Don't let scams get away with fraud. Report at a scam and speak to a recovery consultant for free. . Partager . Skip to content. The Ford Mustang rear end specifications have changed quite a bit since the beginning of the Fox Chassis in 1979. Just above the steering wheel, you'd find an embedded plate in the dashboard made of metal. A basic method to calculate is to mutiply .12 by your tire diameter. Listed are the expected RPM's at 60 MPH with a given rear end ratio and tire height. For example, if the axle ratios were listed as 3.31:1 and 3.42:1 and 3.55:1 and 4.10:1, the lowest ratio of the four gears is 4.10:1. Chevy 10 bolt rear end gear ratio chart. Axle Ratios or Axle Codes. The more gears you have, the smaller the difference in ratios will be between them (eg: on a 27 speed bike there would be 9 steps between one gear and . With our RPM calculator, you can calculate your engine's RPM based off of your vehicle's speed, tire diameter, rear gear ratio, and transmission gear ratio. In Stock. Use the GM RPO codes on the label in your glovebox or on drivers door to determine axle ratios and more. Calculate Rear End Gear Ratio Needed. If you have the rear axle's code from the Certification Label on the driver's door jamb you can find the axle ratio, as well as the load rating, in the following tables. Read off your mph at any rpm in any gear. The splite was like 97. In years 93-97 they had the early version R160 rear diff. In the example to the left, 37 ÷ 12 = 3.083333. However, that's not really true for the front axle, as discussed below. To order a full size laminated Gear Chart please call (717) 764-9844 or email us here. You will have to change the speedometer drive gear in the transfer case if you change your differential ratios and keep the same tire size. The best ratio is to have your engine run at the sweet spot RPM at the speed you will be running most of the time. Put a chalk mark on the top of the tire and the top of the drive shaft. The gear ratio of each overdrive gear of your transmission The speed you want to drive at, usually 75mph How to use the chart. Now what helps with this magic number is torque. The lower the gear ratio, the more rpm required to maintain a given speed with equivalent tire sizes. 4.56:1. A Simple Formula. If you are trying to get the best fuel economy possible for your truck, a lower ratio is a great way to do it. Then you can always count all the teeth on the pinion & ring gears.