ford 9 inch rear end gear ratios chart

Learn more. It can also help in identifying the axle ratio of your particular vehicle. Some axle shafts can be shortened and a new spline machined in place. The 8-inch was introduced in 1962 and is found in many lower performance Fairlanes, Mustangs, Falcons, Comets, Cougars, and Pintos, just to name a few of the applications. Ford rear ends, or differentials, were manufactured by either the Dana Corporation or Ford. It allows for the pinion side Center Section to be removed. The 8-inch also was only available with 28-tooth axle shafts. 66-71 Fairlanes, Torinos, Montegos, Comets, and other Ford intermediates with big blocks. The repair process requires the axle to be disassembled and thoroughly cleaned. So dont be surprised that most of these axles leak from the welds. Ford 9 inch rear end identification is easy and can be accomplished with nothing more than a deep socket as a go-no-go gauge for the bottom two retaining nuts on the center section. actual car posi units, which were primarily 28-spline carriers, can be Aftermarket vendors are actually re-casting these cases in very strong nodular iron, so more often than not it is easiest just to purchase a new case. This allows quick gear ratio changes to accommodate different tracks or updates to your vehicles horsepower and torque ratings. Leaf Spring: The Similarities And Differences. The magnesium addition causes the grain structure to change from flakes to nodules and thus the name nodular iron. 54" Well help you determine the correct flexplate for your Chevy engine in this buyers guide. with 3/8" fine thread, while the larger bearing use 11/16" Call 800.979.0122, 7am-10pm, everyday. Hot rodders and drag racers use 9 Ford rear-ends and their aftermarket descendants in just about everything not just Ford cars and trucks. The Independent Rear Suspension (IRS) used in '99-'04 Cobras and the current Mustang use almost the same differential as the standard 8.8. for 1967-1970 (same as 1966-1969 Fairlane, Torino, Comet & Cyclone non The rear-end housing has a vast amount of ford 9-inch gear ratios available. used the 9-inch rear, regardless of engine size. If you need the Rear Axle Ratio for a vehicle produced before 2008, contact ourCustomer Relationship Center via Chat or call us at 800-392-3673. Notice that the date code is C9UA with the ring gear size of 8.7. The smaller 8-inch just cannot handle the abuse as its bigger brother can. The narrowest production 9-inch axle is 56.375 inches. An assortment of Ford 9-inch axle stampings is welded together to create the housing. We're In 1963, Ford includedmore information. I have spent countless hours over the years collecting, reading, and studying old shop manuals, supplier reference documents, SAE papers, and even vehicle manufacturer reports and notes. Mustangs and Fairlanes. While the larger offset makes the ring and pinion gears stronger, the additional sliding of the gear teeth creates more heat in the axle. Details: Motive Gear . The image below shows the Safety Label of a Ford Truck. at car swap meets and shows are the units pulled from trucks with the if one wants to use a 31-spline truck carrier in a car. The N cases typically came with the larger Daytona-style pinion support bearing, and 31-spline axle shafts. The complete guide to master any grease gun, Battery vs. Starter vs. Alternator: How to jumpstart even the most stubborn of car. It is a column with the label AXLE on top and the Axle Code at the bottom. Thanks. Give us a call at 800-216-1632 to get started. The BOM will identify the model number, the gear ratio, the type of differential, and all component parts. Width: all measurements are flange to flange. The We'll also walk you through choosing the correct parts in order to make this installation a breeze! These third members are the strongest of the production cases and the most desired. carriers both, as well as with the spline count on the axle shafts. Find the word AXLE under the bar code. A Well show you what to look for in this buyers guide. The of course most desirable is the N case, first used on the 427 Galaxies 1958-1959 two dimples on the back of housing, flat center band, some had drain holes. Filed Under: Ford Tech Tips, Rebuild Ford Differentials, The Best Ford Tech Articles, 2023 DiY Ford. The very rare optional 6 cylinder rear was the 3.50. One exception to this was Like the 9-inch, the 8-inch uses no carrier breaks, meaning you can put a 5.43:1 ring and pinion in a 2.79:1 rear without changing to a smaller differential carrier. found in the trucks up to around 1982. In order to verify a nodular unit, you need to look on the inside of the casting. inches This is not a nodular unit. Learn how to hook up a 1-wire alternator on your vehicle. 1967-1973 Mustang, Torino, Ranchero, Fairlane 9-inch Four of the 11 inch-diameter versions are pictured: 1 inches (top left), 2 inches (top right), 2 inches (bottom left), and 3 inches (bottom right). The 9-inch housings center section will not allow the socket to clear, and you must remove the two bottom retaining nuts with a boxed end wrench. You are looking for a nodular iron case, with its telltale N cast into the front or inside wall. . There is a machined roller bearing race on the pinion head portion that points at the differential opposite thetapered bearing races. This is a typical axle tag that has been removed from the third member. always looking for good content to share with Snap On vs Daytona, Pittsburgh, ESCO, Husky, More. Locate the Safety Compliance Certification Label on the driver's side front or rear door panel. WJ Handy Dad recommends safe practices when working on vehicles/homes and or with tools seen or implied in this video. Read more: Torsion Axle Vs. The code, 4L11, tells us that it is a 4.11:1 ratio with a limited-slip or Traction-Lok differential. The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. There were also 8-inch ring gear independent carriers in production. 1/2 ton 4X4 pickups! It's uncertain if this E Ford Differential Axle Codes. Let's see, I have had 2.79. When it comes down to actual shafts as well, since the truck lug With so many better performing aftermarket options today, there is no reason to use these marginal brakes. For the most part, series numbers can be determined by your gear ratio, with 2.73 and lower rearend gear ratios falling in the 2-Series, 3.08 to 3.90 rearend gear ratios falling in the 3-Series, and 4.10 and higher rearend gear ratios falling in the 4-Series. bearings, 28 and 31 splines, 57-68 passenger car and 1/2 ton truck - medium duty, stronger than Mustang When you buy through our links, we may get a commission. With 568 Ford 9 Inch Parts for sale, you're sure to find the ideal parts . Once you have identified the label, locate the word AXLE under the bar code section. 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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 of the transmission and then reverse it to show engine RPM for every 10mph and each transmission gear. Are reviews modified or monitored before being published? Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear lower on the ring gear. But if youre looking for an original, they can be spotted quite readily even without an axle identifycation tag. socket size and 7/16" fine thread. It was not the only axle used, but was by far one of The rear end width is important on shoebox Fords if you want some selection on wheels. The 7.5 should be plenty adequate for the application you describe, but an 8.8 is best. For a better experience, please enable JavaScript in your browser before proceeding. and 429CJ cars.From what I have seen don't expect to find them in 390 or Fords small block and big block engine families have their share of flexplate differences. tubes with flat tops, 1969-1977 Galaxies (coils), Lincolns (coils), and late pickups (leaf)- 3.25 If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. 67-73 medium and big block Mustangs and Cougars. When you look on the inside, you see WAB- 4025A. 13 lovely chevy 10 bolt rear end gear ratio chart. 67-70 Mustang = 59.25 inches. housings appeared in either 1966 or 1967 with the familiar "Hump" 31-spline carriers and "Traction Loc" style posi unit. There may be a second dash and more numbers and letters on the top row if there are specifics that are unique for interchange information. 289 Hipo cars.The N cases went with 31 spline centers and are for rugged Ford Axle codes help identify the vehicles positraction as well as an axle to gear ratio. This pinion shows excessive wear on the trunnion surface and should not be re-used. most abundant. If measuring the drum-to-drum distance, add .200-inch to these values. 70's. Variations Since these housings were a series of stamped-steel pieces all welded together, there were many different overall lengths, tubes sections, mounting brackets, and even general constructions over the years (see Chapter 5). for 1965-1966 (the same width as 1964-1965 Falcons and 1962-1965 Fairlanes How do I find the Axle Ratio and Limited Slip? A metal axle tag is typically located on the driver-side front of the third member. For example, Ford says the 2018 F-350 Super Duty 4x2 regular cab pickup equipped with the 6.2-liter . Centers: 1957 - no dimples, flat center band up the center of the rear cover, bottom drain plug, 1958-1959 - two dimples on back of housing, flat center band, some had drain holes, 1960-1967 - two dimples, flat center band, oil level hole in back cover, 1963-1977 Lincoln, LTD, Thunderbirds had 9.375 inch centers, housings were cut away at the gasket surface for ring gear clearance, one curved rib at the front top portion of differential, strong but no gears, 28-spline axles cannot be shortened and resplined (they're tapered), 1972 and earlier 31-spline axles have the ability to be shortened, 1973 and later 1967-1973 Mustang axles can be identified by wheel flange: Oval hole = 28 splines; Two large holes and counter-sunk center = 31 splines. Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. Also note there isn't a cover on the rear like most axles. Would very much apreciate it if someone would post it again. shafts. This was an 8.75- inch ring gear in a 9-inch housing. with 3/8" fine thread, while the larger bearing use 11/16" mind as mentioned, the Fairlane spring perch distances were not the same The Ford 9 inch rear end is one of the most popular axles in automotive history. The N cases had two vertical ribs, three horizontal ribs, and a machined-in fill plug. Find your transmission and rear gear multiplier below. The axle housings themselves had many different variations over time as well. 1963-1977 Lincoln, LTD, Thunderbirds had 9.375-inch centers, housings were cut away at the gasket surface for ring gear clearance, one curved rib at the front top portion of differential, strong but no gears.. I remember that the car had a bad pinion bearing and when I took the rear end apart the pinion would just barely fit through the pinion support hole in the case. Since the "Limited slip" or Locking rear end truck housings received even beefier center carrier housings and tubes, The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. Amateur restorer. Read more: CV Axle Boot: Overview, Signs, And Replacement. The Ford 8.8-inch axle has the same ring gear mounting distance (see Chapter 7) for all ratios, just like the 9-inch. the early housings are ok for the average street performance cars. C-6, three-speed, automatic. much more difficult to locate. Many people prefer to just call it the Ford 9-inch-style wheel end. These used what is referred to as a Why is the Ford 9in rear end the go to rear axle for street and strip builds for over 70 years? The typical 3 inch-diameter tubes can be a bit flimsy in higher-power applications. 4. For the Ford 9" rear end to be smaller and lighter than a Dana 60, the weight has to come from somewhere. The last set of digits on the top row on the right side is the date code. 76-77 large bearing. Some of the heavier cars like the Galaxies also received the For instance, if both the engine and transmission deliver up to 100 ft./lbs. version of the case came into use in 1967 or in subsequent years, but it The bar code is present on this unit as well, although later axles just carry the bar code and the metal tag is no longer required. Call us at (864) 843-9275. There are even different drum brake registers. JavaScript is disabled. The close-ratio and C4 289HP trans were mated to the 3.50, and occasionally to the 3.89 and 4.11. While we do offer cut-to-fit axles, you still need to ensure you have the proper measurements to be within the cut-to-fit area of the axle's splines. The larger offset is better for strength and noise but worse for sliding and efficiency. The same applies to vehicles with codes containing numbers alone. Also, since this axle is used in so many circle-track race cars, the 9-inch enjoys an unparalleled availability of different gear ratios in the aftermarket. It was introduced in 1957 model year cars and ended production in 1986, having been phased out in favor of the Ford 8.8 inch axle.However, aftermarket companies still produce the 9-inch design. type, 28 and 31 splines, Ranchero/Torino - heavy duty thick wall housing, 3.25 inch diameter axle medianet_width = "300"; 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. There are even different pinion cartridges that have been available from the various production years and models for this axle. The axle tag typically has two lines of numbers and letters stamped on it. It was required to repair a leaking weld. middle of case it is a good IRON type IF in the very center of this case Strange Engineerings superior line of Chrome Moly Transmission yokes are manufactured from high quality forgings and fully heat treated to achieve maximum tensile strength. pattern (same as older Jeep), a 65-inch width at the wheel mounting surfaces, inch diameter all the way to the backing plate, coil housings have upper The axle code in our example, H9, has a specific meaning. nickel content and better casting than the earlier single ribbed cases it 1973 and later cars have a 55 bolt pattern, and the axles cannot be shortened.

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