4 litre, overhead valve 8 cylinder with 2 valves per cylinder. 55 rear gear and a 3. 0 with bolt-ons (3. Ford 9 1/2" Information. 1)Please explain gear ratios found on Ford F450 & 550 series If I remember coprrectly 4. 55 gears and factory limited slip in the Ford 8. By 2004, the 7. Rpm: Tire Diameter in inches: (use the diameter of the tire that puts power to the ground) Primary Gear Reduction Ratio: to 1 (If you are not sure what this is, make it 1. As you increase the size of the tires you effectively raise your gear ratio. Stall speeds of 1000 to 2000 over stock converters can be expected. The Ford 9-inch axle came from the factory with ratios that are whole numbers, such as 3. This type of ratio is referred to as non-hunting because any given pinion tooth always contacts the same three-ring gear teeth per revolution. The countershaft diameter of 7/8 inch and front bearing were both carried over from the T10 4-speed design. 8" rear end in the Mustang. Gear Set 9" Diff 3. You know the tire height in inches. 5:1 161 hp at 4400 RPM 272 cubic inch. 79:1 rear without changing to a smaller differential carrier. Call today for the right gear for your application. The numbers can be deceiving in that a high gear ratio has a low number, and a lower gear ratio has a higher number. Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size. 8-inch differential feature six gear ratios: 3. you will be looking at a $2000 bill after all is said and done. We found out just how easy it. This is what we ran on 3\8 tracks. 5" axles are 28 spline axles. 0L Power Stroke was introduced for the 2003 model year and offered alongside the 7. We have the largest selection of Ford Explorer Rear Axle Assembly parts at discount prices. 55 5300 FORD REG 1991 35 4. How do you tell what is the rear end gear ratio on a 1996 ford ranger XLT with a 2. The most popular rear end around is no doubt the Ford 9 inch unit, it is used by restorers, street rodders and racers alike, regardless of what brand of car the axle is going in. Selecting Pulleys for a Powerdyne / Cool Charger / B&M / Ford Motorsports / Dinan. Let's see, I have had 2. By multiplying. Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size. 5-INCH The small Ford rear end, which sometimes uses a fiberglass cover, is found in Bronco IIs and non-4. It’s been less than a year since the sixth-generation Ford Mustang arrived in U. Find your Ford vehicle in the chart below and click on the illustration for a larger view. 00:1 Ratio Crown Wheel and Pinion Diff Gear Set - NEW. 00 for Muncie and T10 transmissions cores, depending on the condition. Gears can be a pretty general term but in this case, they refer to the ring and pinion gears residing in the rear differential. The 2018 Ford Explorer has pulled off a graceful transition from clumsy off-roader to genteel family wagon. Lugging the engine is a risk if it goes too low. Motive or US gear/Strange gears are used in all third members. The Fastback 2+2 was gone - replaced by the new SportsRoof model. The front Dana44 TTB axle should be open with 3. 8-inch differential primarily for its trucks, sport utility vehicles and vans, but some mid- and full-size Mercury cars also featured the equipment. 0:1, which was achieved with a 39-tooth ring gear meshing with a 13-tooth pinion gear. Are you trying to find used Ford rear axles? If so, PartRequest. 5:1 compression and 182 hp. Torque rating remained the same at 265ft/lbs. So in order to get cars moving with 3. late model axle ratio. Below are 2 tables showing the codes from the tag on a ford rearend the code will tell you if it is a 8 or 9 inch and what ratio is supposed to be in the carrier [ 8 inch | 9 inch ] 8 inch ID tag numbers. The next year gave Ford the platform to display their new small block motor. If you have 3. Ford 8 Inch Ring and Pinion Gears made by Speedway Motors, for as low as $164. 8-inch rear axle found under zillions of 5. 0" Ring Gear with 3. The Ford 8" The younger brother to the 9 inch, the Ford 8 inch is an identical design, but on a smaller scale. Most will say that the 3. 10 gear kits are a popular upgrade among Mustang owners. Just bolt in and hang on! Features:. Choosing the correct gear ratio is critical to maximizing performance, efficiency and drivability for any kind of vehicle operating under any conditions. Gear Ratio 3. i was thinking of swapping out to 3. Wake up your 1979-1993 Mustang with a set of rear end gears. 50 Ratio 1965, OE Solutions™ Rear Differential Ring and Pinion by Dorman®. 69-74 E-100 Econoline Ford 8 in. 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. 31 inches where it goes into the carrier. I've got an 86GT and I was wondering what gear would be better for the 1/8mi with a stock 5. Access Optimum Transmission Gear Ratios Calculator RICHMOND is the leading manufacturer of professional quality, hi-performance ring and pinion sets. Try our gear ratio calculators here. For example a LT265/75R16 would be around 31. Notice with your rear gear in 1st-overdrive how low you would have to go in a new rear gear to make 2nd gear have that much torque multiplication. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. The most popular rear end around is no doubt the Ford 9 inch unit, it is used by restorers, street rodders and racers alike, regardless of what brand of car the axle is going in. So looking at the axle tag above, you can see it's a 3. Hello fellows, I'm sure this question has been asked before, but I searched the forum and didn't find what I'm looking for. To support the greater weight, the Ram Heavy Duty's front drive shafts and U-joints are larger, and the Ram 3500 has a 11. The pinion nut should measure 1 1/8 inches, as long as it is the OEM pinion nut. This Final Drive number is also your torque multiplier when in that gear. Three times an engine speed of 800 RPM equals 2,400 alternator RPM. 00:1meaning the driveshaft will spin 3 times for every complete tire rotation. Tiger Quick Change Rear Ends utilizes cutting edge technology to design and manufacture the highest quality strength to weight ratio rear ends possible for motorsports applications. 75” REAR DIFFERENTIAL INFORMATION Sure Grip is the performance type of differential that enables both rear tires to turn under power for better launch traction. This engine produces a maximum power of 355 PS (350 bhp - 261 kW) at 5000 rpm and a maximum torque of 597. 0-liter-powered Rangers. The final gear ratio is suited for 29 inch, this ratio in this particular case is 3:5, referring to a chart it will state the same (29' recommended ratio is 3:5) and looking at 33 inch diameter the chart will recommend 4:1. 40 Ratio MADE IN THE USA! SAME DAY SHIPPING (if ordered before 2pm EST) Lightning™ Series is an option that can be selected below, This option can increase the shipping time by up to two weeks!. Ford 9 inch Moser 9 inch (Gen 3 and 4) Ford 9 inch swap into a Third Generation Chevy Camaro: Kits available to bolt right in with spring pads, torque arm mount as well as control arms and panhard rod. Techline (586) 468-1356. difflappingqld. you get what you pay for. Model A & B Ford Garage Rear Axle Gear Ratios. Using this simple method you can. Gear ratios:. 5 14 bolt has such huge teeth with very little pinion offset. 84" - GM #3708144 (27 tooth spline) or GM #3978758 (32 tooth spline) Small 6 tooth drive gear - 1. It's important to know the gear ration of a differential before installing ti. With this being a 86, and the number of 5. The GM 10-bolt (8. A commonly overlooked component of a vehicle’s drivetrain that has a large effect on fuel economy is rear end gearing. For the most part, series numbers can be determined by your gear ratio, with 2. Of these Ford rear differentials, either a 28, 31, 35 or 40 spline axle can be used. 1-16 of 436 results for "ford 9 inch gears" Skip to main search results SVL 2020615 Differential Ring and Pinion Gear Set for Ford 9", 4. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. 8" Rear End 3. 8 Rear-End; How to Narrow a Ford 8. Ford 8" - Drop out style rear end with 8" ring gear. 156-inch wall 4-link bars, an adjustable, urethane-bushed, low roll-center Panhard bar (1-inch od X. Skip to main content. You should be able to find your gear ratio listed on the axle tag, however, if that has gone missing, you can simply count the number of teeth on each gear and divide the number of ring gear teeth by the number of pinion gear teeth. - Ratio Guide Diff Lapping 4/' DIFF LAPPING QLD www. Find a quality Ford Explorer Rear Axle Assembly and other used SUV parts from the top auto salvage yards. Gear Ratio & Tire Size Chart. 625) was used on 2000 and later-year trucks. This calculator outputs the how fast a car can go in each gear as calculated by the gear ratios, engine redline and tire size. 75" Rear End Torque Specs. ford capri axle ratio. 00/1 gear ratio. Can you tell the difference between a 9. (and Ford Mustang) Speedometer Gear Calculator. gear ratios & tire sizes xls. 8- and 9-inch must be rebuilt after extensive use and need a variety of different ratios for top performance and special applications. The final ratio is usually considered seperate from the main transmission, kind of like the front sprocket on a bicycle. Click on Calculate. 20 first gear ratio which is the same in the M21 is not that good for off the line acceleration. Identifying the gear ratio of an AMC 20 is a bit tricky. The close ratio between gears and the Ford patented direct-acting hydraulic control of the 10-speed automatic transmission with SelectShift capability really optimize the power and torque curves of this high-output EcoBoost powerhouse. 29 axle, 78 to 82 V8 on all Foxes. Buy early Ford Bronco 9 inch rear axle parts at Bronco Graveyard. What rear axle ratio would be best for a large 5th wheel camper cross country trip? The new Super Duty diesel comes with three rear axle ratios: 3. Your vehicle will probably run at different RPM's than those you calculate. It was first used in model year 1983 Ford trucks. Hello fellows, I'm sure this question has been asked before, but I searched the forum and didn't find what I'm looking for. The easiest way to tell the difference is by looking at the brakes. This type of ratio is referred to as non-hunting because any given pinion tooth always contacts the same three-ring gear teeth per revolution. You can also compare your gear ratio on the front axle ID tag. 25's were reserved for single rear wheel (SRW) applications, where the larger 80 was used in all duallies (DRW). 21 6600 1880 4718. The heavy duty T5Z has a cluster gear reinforcing plate and stronger fifth gear to meet the needs of customers whose street or track use requires a T5 with higher HP capacity and a close ratio fifth gear that can be used for acceleration rather than just highway economy cruising. If I'm not mistaken, 99 and up will have disc brakes, below that will be drum. difflappingqld. I found out very quickly that he cost of custom Ford 8. Charts showing engines offered. How to Rebuild a Ford 9 inch. The driven gear clips onto the end of the speed cable. 8 inch East Coast Gear Ford 8. 8:1 (38/10). Looking at that tag, you can see the gear ratio stamped on the lower left, and the axle size (ring gear diameter) stamped in the bottom middle. Your info is perfectly summarised, but you missed the funniest and quite common odd ball ratio ever, the open wheeler 2. The pinion nut should measure 1 1/8 inches, as long as it is the OEM pinion nut. fixed to a motor): specify numbers of teeth for red and yellow gear below, then click calculate. 0 out of 5 stars 1. Look at the final drive ratios for each gear. I have a ford 8 inch in my 75 merc comet but it has 2. 00/1 gear ratio. if you put the gears in, you can increase your tire size. It's a"low" gear ratio but it has a high number. With a maximum top speed of - mph ( km/h), a curb weight of 3397 lbs (1541 kgs), the 442 I 6. Drive Gear Teeth - The Number of teeth for the transmission; Rear End - Rear Gear Ratio (3. The GM 10-bolt (8. Check out free battery charging and engine diagnostic testing while you are in store. Capacities Fuel Capacity 10. Lots of information for Classic Ford collectors, restorers or general enthusiasts. DANA 28 The alloy-case Dana 28, with a 6 5/8-inch-diameter ring gear, came in Bronco IIS and Rangers with anything. Gear Ratio & Tire Size Chart. Heidts: Third gen rear Ford 9" diff IRS kits. If you are removing a Ford OEM gear, the use of the same thickness pinion shim on the new Ford Racing gear, most times will allow you to. Most of the formulas dealing with gear ratios will want a tire diameter (measured in inches). The 9 inch Ford performance rear end has established itself as the gold standard for strength and durability. Truck stroke/bore ratios are typically higher (1. 75-ish gear ratio for this ford 9 inch rear im rebuilding. 65 Final drive 3. GBT9150 Ford Sierra Type 9 5 speed gearbox std ratios (outright) A fully reconditioned gearbox. Ford 9 PRO GEAR* TM Winners Run RICHMOND! TM • Stem Size 1-7/8'' • 35 Spline & 28 Spline • 10 Holes • 20 Bolt • 9. If you look carefully, you will note that the Dana 60 (and 12-bolt Chevy) pinion is closer to the ring gear centerline than the Ford 9" ring gear differential. This axle is still in production today for a variety of Ford vehicles. Its the worlds tallest gear ratio axle ever, and our Foxes got it with the Ford 7. If your axle code is "H9", you should have 3. 95 1st? What is the 1st gear ratio in a Top loader 4spd? How much HP can a (small block) Top loader handle? Just want to compare it to a T5 witch is about 300hp (give or take) f. 4L Power Stroke was introduced for the 2008 model year and offered in the Ford Super Duty platform through the 2010 model year before being retired in favor of a more powerful, emissions friendly design. Enter the tire size diameter and the target vehicle speed in MPH. gear ratio calculation. two speed rear ends use a planetary to reduce the input gear from the main HIGH ring gear reduction through planetary reduction and out the axle shafts. They move more air (CFM) at lower impeller. Use our gear ratio calculator to find the effective gear ratio your vehicle will have with a new tire size. Check out the latest Ford F-150 features and specs at Car and Driver, including safety and warranty information. Next thing to look at is the rear brakes, the SVO model had five lugs and disk brakes (it is also a 8. Ford 9 inch Moser 9 inch (Gen 3 and 4) Ford 9 inch swap into a Third Generation Chevy Camaro: Kits available to bolt right in with spring pads, torque arm mount as well as control arms and panhard rod. 8" rear Trac Loc Limited Slip for The ARB Ford 8. i have a ford 8 inch rearend right now, but only has 3. 8 Inch Ring Gear, Without Posi Traction * Stocked in outlying warehouse--shipping delayed up to 4 business days 4 Day Delay ZUMBROTA RAA435110A. Ya an overdrive with these high of gears would be useless but since the final gear is just a 1:1 then I will be fine. Your vehicle will probably run at different RPM's than those you calculate. All above dimensions are in inches unless otherwise noted Fuel capacities are as follows: 30. gear ratio calculation. If so it is a 8. Even at just ½ throttle it performs, and at full throttle is just plain awesome. If you own a 1979-2014 Mustang, then it came equipped with one of the two Ford rear ends - Ford 7. this means that dimension "C" is usually longer than dimension "B". I want to avoid last second shifts near the traps that will hurt my ET. com : Mechanical Articles - 8 inch rear end gears My 73 Maverick came stock with this gear and was great. This is what we ran on 3\8 tracks. Teeth Driven Gear Colour 2. Ford 8 and 9 inch pinion depth is regulated by shims between the pinion support and chuck or center section. 2”, then they are not far off, but the 8. Try cleaning it again, you want to rad the bottom line of numbers starting from the bolt. 68" bore x 3. 89:1 as it is an 8 cylinder car with manual transmission. For example a LT265/75R16 would be around 31. Vehicle performance can be greatly improved by optimizing gearing for your intended application. 0 gallons with 137, 158 and 172. Ford Racing 8. 8 is found in almost all Ford V8 cars from 1986 on, and in V6 Rangers and Explorers. 8 Rear End Housings. 8” rear end in the Mustang. 73 is a lower ratio (engine spins 3. 156-inch wall 4-link bars, an adjustable, urethane-bushed, low roll-center Panhard bar (1-inch od X. About this Engine RPM / Tire Size chart: The following chart of Tire sizes and axle gear ratios are meant to give a general idea of the relationship between the differential gear ratio and the tire size and what effect the ratio has on power output and fuel economy. 875-inch), along with the Dana 60 axles, require specific differentials to account for the ring gear mounting-distance change with changed ratios. i was thinking of swapping out to 3. ford capri axle ratio. 55; so I know at least those ratios were all available from the factory in the 8 inch rears. Original gear ratios range between 2. Looking at that tag, you can see the gear ratio stamped on the lower left, and the axle size (ring gear diameter) stamped in the bottom middle. Introduction. 8-Inch is also used in other Ford products such as Ford Mustangs, Ford Thunderbirds, Ford Crown Victorias, and their equivalent Mercury and Lincoln products. FORD COMMERCIAL VEHICLES 2018 F-SERIES SUPER DUTY ® CLASS A MOTORHOME CHASSIS 2016 Motorhome shown. The number is cast into the webbing next to the pumpkin and is also listed on the tag if your axle still has one. Unless you live on the Autobahn you are ruled by 70mph speed limits and driving at max of 90mph for a couple of seconds in public areas, and for me with the curvy roads in the UK I don't want it to feel like I'm driving an automatic when hustling the car because I would never need to shift out of 2nd gear. We will manufacture them out of the material YOU specify or we will take your sample gear and have it tested to determine the material and hardness. The most popular rear end around is no doubt the Ford 9 inch unit, it is used by restorers, street rodders and racers alike, regardless of what brand of car the axle is going in. 8 is found in almost all Ford V8 cars from 1986 on, and in V6 Rangers and Explorers. gear ratios & tire sizes xls. A web based calculator to help you pick the right size tires, wheels, rear end, gear ratio and transmission for your 55-57 Chevrolet. Use this gear ratio calculator to see what ring & pinion gear ratio will be right for you after a tire size change. Chart showing transfer cases offered and gear ratios. 8" gears, off-road ring and pinions, ring and pinion gear sets, master install kits, pinion kits, mini install kits, axles, ujoints, bearings, air lockers, triple drilled flange, diff housings, solid spacers and other Ford performance parts and accessories for your 8. The five-speed Ford Type 9 gearbox was the first 5 speed transmission fitted to production Ford RWD vehicles. I looked up the owners manual for the 2014 Ford F-150. The GM 10-bolt (8. Filthy Motorsports carries a wide range of parts, gears, and upgrades for the Ford 8" axle including ring and pinion sets, axle rebuilt kits and bearings, differential covers, upgraded axle shafts, heavy duty u-joints, oil, and more. LTD (FRGPL) specializes in manufacturing Starter Ring Gears. right now it has a mild 302 (300-340 hp range) with a c4. 8 rear end East Coast Gear Supply - Ford 8. Produced in limited number in 1993, 1994 and 1995. There are 24 different Fords that offered the 8. 09 had the engine turning at 2899 RPM at the same. About 8 months ago, I came across someone who had a very complete model, ratio chart for 9 in rears, After a computer crash, I have lost it. By your method of multiplying, the ratio would be 432 which isn't even a ratio at all. If you divide the number of teeth on the ring by the number of teeth on the pinion, 36/12, it yields the gear ratio of 3. 8 and 9 Inch Ford Rears Built for Street to Race Applications. 80's instead. See current catalog or web site for warranty disclaimer. Find out why the 2018 Ford Explorer is rated 6. ft) at 5000 rpm. 14 Ratio Gear. 08's up to 6. i have a ford 8 inch rearend right now, but only has 3. For example, if you have a Dana 44 axle with a gear ratio of 3. Putting it in first gear and rotating the input shaft and counting the output shafts revolutions is the only real way to verify. Truck Trend is the source for official specifications, payload, towing capacity, and other information that matters to real truck users. 1958-1969 used the Dana Power-Lok. com's parts locating service can help you find quality used Ford rear axles from reputable salvage yards located throughout the United States and Canada. With the availability of practically "everywhere", high support, and ease of mod, it is no surprise why people are turning to the Ford 8. Body Type Identification Charts. With a 9 inch there is an endless supply of combinations to suit your specific needs, like different centres such as; Limited Slip (LSD), True Trac, Minispool, Fullspool, Locker and Open centres, and a gear ratio selection from genuine Ford or after market sources that would cover every combination your car would require. The truck would only get 8mpg unloaded and 5. 8 as their solution to differential upgrades. A Ford 9″ can save you money if the worst should happen. Easily find parts for ring and pinion gears, differentials, axle shafts, manual transmission parts, and transfer case parts, using our easy eCatalog. So, let’s use this to figure out the displacement of a Ford engine that has a 4-inch Bore and a. 69-74 E-100 Econoline Ford 8 in. 8-inch could also be considered for applications where a Chevy 12-bolt would normally be desired. RING AND PINION TOOTH CONTACT PATTERN. 64 first gears, and with smaller cubic inch engines first gear ratios in the 3. The Ford 9-inch axle came from the factory with ratios that are whole numbers, such as 3. If you divide the number of teeth on the ring by the number of teeth on the pinion, 36/12, it yields the gear ratio of 3. Let's see, I have had 2. I am looking to get a 2019 Ford F350 dually. If you are removing a Ford OEM gear, the use of the same thickness pinion shim on the new Ford Racing gear, most times will allow you to. 8:1 (38/10). Look at the final drive ratios for each gear. 3-speed manual transmission in 3rd gear; 5-speed (or higher) manual transmission in the last gear; The ratios used for the transmissions are 0. See the Gear Ratio calculator in the Spicer Tool Kit to determine your ratio. You can also now calculate when using different transmission gear ratios, like in first gear or in overdrive. Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Select the value you want to solve for. 825 and the same final drive ratio of 3. Gears can be a pretty general term but in this case, they refer to the ring and pinion gears residing in the rear differential. The last Ford 9-inch rear end to be installed in a truck was at the end of 1985, which concluded all (factory) production of the Ford 9-inch rear. Uses 28 spline axles. Ford 8 and 9 Inch Rear Ends: Complete - Ready to Run - Drop out third members for Ford rear ends: New Timken bearings, Yukon Gear ring and pinion gears: Ratios for every need, whether it's for street, highway, circle track or towing : Third members for any Ford or Mercury using a removable carrier. Antique Cars Classics Customs Hotrods Leadsleds Roadsters Streetrods Trucks Turbine Car 40 31 Ford 67 Dodge Charger 61 Chrysler Images Specs Pictures Photos. Outright sale, no exchange is required. Your Locking Differentials source with low prices and FREE shipping on orders over $50*. stay away from yukon gear and other cheap brands. Ford 8" - Drop out style rear end with 8" ring gear. For example, a 3. The superior quality of these gear sets is the result of years of racing development, outstanding design, and state-of-the-art manufacturing methods. Ford non-overdrive transmissions include:. This code is marked with RED in the location photo above. Ford Racing 8. 25's were reserved for single rear wheel (SRW) applications, where the larger 80 was used in all duallies (DRW). We offer a complete line of rear end parts for your Ford 8. Your info is perfectly summarised, but you missed the funniest and quite common odd ball ratio ever, the open wheeler 2. What rear axle ratio would be best for a large 5th wheel camper cross country trip? The new Super Duty diesel comes with three rear axle ratios: 3. 62:1 low range, Dana 44 and Ford 9-inch axles with 5. Richmond Gear EXCel F9411 9" Ford Ring & Pinion, 4. Also calculated is the new gearing you would need in order to return back to your original gear ratio when going to a bigger or smaller tire. Simple guide to choosing the best diff gear ratios for your Jeep or 4x4 truck The correct chart for your gear ratio is important for drivability and economy. Division is the only way to figure it. gear ratio calculation. Good "rule of thumb" calculation is to mutiply. 0 out of 5. However, the overall span of 7. Like the 9-inch, the 8-inch uses no carrier breaks, meaning you can put a 5. 8 rear end East Coast Gear Supply - Ford 8. Many custom made axle housings for the GM boys utilize the 9 inch Ford, even though they hate to admit it. Additional cooling is a must. We’ve created this chart for easy reference. The gear ratio inside the rear differential might not seem like much, but. The 1962-63 serial numbers are located on the front, right side of the differential carrier. The ring gear measures 8. For 1966, Thunderbird's 390 engine got an increase in horsepower to 315. All sorts of information about 1965 Mustang Axle Ratios. Ford 8 and 9 Inch Rear Ends: Complete - Ready to Run - Drop out third members for Ford rear ends: New Timken bearings, Yukon Gear ring and pinion gears: Ratios for every need, whether it's for street, highway, circle track or towing : Third members for any Ford or Mercury using a removable carrier. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in 1963. I looked up the owners manual for the 2014 Ford F-150. Ford Mustang 64½ General Specifications including the Ford 65-66 V8 Service Interval & Lubrication Card and the Ford Mustang 65-68 Tune-Up and Wheel Alignment Chart. 32 33 34 banjo housing size are alike, and 35 to 48 the banjo housing is the same, but drive shafts and gear ratio's are different,. We offer 9 inch rear ends, ford 9 inch third member dropout, Ford 8 inch third members, Complete crate bolt-in 9" rear ends and 12 BOLT rear ends. The new Ford 302 would be ideal for Trans-Am racing since it was under the 305 cid limit of class limit, but the hi-po heads would be too restrictive on the longer stroke of the 302 block. The Ford Maverick Page. 56) (see more formulas at bottom of page) The below table can be used to get a rough idea on gear ratios. Yesterday I pulled the center section on the rear end from my 1955 Fairlane Club Sedan to check ratio and condition. Description: US Gear Ring and Pinion # 07-990340 | Ford 9" PRO Big Pinion | 3. 73 ratio should net you better mileage but thats not the case. 73 gear ratio requires 3. 62:1 low range, Dana 44 and Ford 9-inch axles with 5. Looking at that tag, you can see the gear ratio stamped on the lower left, and the axle size (ring gear diameter) stamped in the bottom middle. 0 differential on your Ford vehicle. 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. For more excitement, a new 345 horsepower 428 V-8 engine was just $64.