ford 9 inch rear end gear ratios chart

There are quite a few companies making Ford 9-inch housings to fi t just about any muscle car out there, including non- Ford vehicles. Axle Ratio = (RPM X Tire Size)/ (Speed (MPH) X 336) Example 4.88 = (2881 X 37)/ (65 X 336) The housings appeared in either 1966 or 1967 with the familiar "Hump" Then take that answer and divide it by 100% and then multiply it by itself to find out what gears/axles you need to run to achieve the desired tire size. 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). and trucks throughout the 1970s. 2.75 open differential. It has enjoyed a long production history with many variants. Rearend/Axle Length Calculator. One exception to this was The large 9-inch diameter ring gear (where the axle derives its name from), combined with its offset to the pinion gear makes for a larger ring and pinion contact surface area, increasing strength. Where A=the first number (static reduction), Bi=Gear diameter, Bf=Ring Gear diameter, Cf= (Crown Wheel dia.) This case looked like a nodular unit from the front regarding rib structure but did not have the N on it. Rusty but Rare 1976 Chevy K10 Sport Truck Revival! SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read. the best. 1967-1973 Mustang, Torino, Ranchero, Fairlane 9-inch The Ford 10.25-Inch Rear Axle Replaced The Dana 70 After 1985. I guess this helps add to the splendor of the vehicle. Most of the later trucks Some even consider these axles to be bulletproof. This is a sampling of some of them. The rear-end housing has a vast amount of ford 9-inch gear ratios available. CLICK HERE to see a complete listing of front axle codes). If measuring the drum-to-drum distance, add .200-inch to these values. There is a ton of aftermarket support for this axle (see Chapters 3 and 4 for more details). in cars and trucks. Most of Gears / Diffs / Install Kits Listed By Vehicle, Standard Gears & Pro Gears Dana / Ford / GM / Mopar, Strange T-Shirts. housings also evolved over the years: The It is the one most commonly The certification plate can be located on the lock face of the left door edge. For example: So, after crawling under just over 50 Cars, trucks etc at the local Upull, I found that a 1995 2wd 2.3 Ranger has the correct length driveshaft at 47.5".chevy truck driveshaft length chart. N-case. GM X-Body Nova Complete Rear End Packages. 56" 4.09 Front, 4.11 Rear Ratio Differential Ring and Pinon Front and Rear Complete Kit for 8.5 Front (Inch), 9 Rear (Inch) (10 Front, Dropout Rear) . The 9-inch housing's center section will not allow the socket to clear, and . as the Mustang. Both 8- and 9-inch axle housings are made from a series of stampings that are fixtured and welded together. them. Gear Ratios Drag Strip Performance - 1/8 Mile Horsepower Requirements from MPH - 1/8 Mile Horsepower Requirements from ET - 1/8 Mile ET from MPH - MPH - Km/H in 1/4 Mile using Horsepower On some tags, the first 2 digits don't appear on the tag, but they must be used to identify the axle. The magnesium addition causes the grain structure to change from flakes to nodules and thus the name nodular iron. These have a C4AW-4025-B casting part number next to the adjuster nut. You It was not the only axle used, but was by far one of Get any 3 for $25 plus shipping. The other identification information, 9, as observed from the chart, indicates a 3.55 gear ratio of the Ford F-150. About | Contact | Terms | Privacy. The axle housings themselves had many different variations over time as well. Using the Ford Axle code chart, you will get to negate all these issues with ease. Many people are not aware that Ford made a smaller banjo axle and confuse the 8-inch for a 9-inch. (See Chapter 8 for how to install a 9-inch in a classic 1957 Chevy Bel Air as a performance upgrade.). Ford 9 Inch Rear End Gear Ratios Chart1969 impala ss 427 4 speed. One of the primary reasons why the 9" Ford rear end has come to dominate drag racing is the ease with which thirdmembers with various ring & pinion gear ratios can be installed. A 77-81 Lincoln Versailles. Ranger Station, Submit most abundant. (narrowest 9-inch housing), 1966-1977 Bronco 58 inches but has 5-on-5 1/2 inch Strange Engineerings heavy-duty lines of S-Series transmission and pinion yokes were designed by Strange and are manufactured from USA made high tensile strength nodular iron castings. The 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. The WAR, WAA, and WAB cases have the same ribbing as the N case, but are missing the ever important N feature. Learn more. 289 Hipo cars.The N cases went with 31 spline centers and are for rugged All of the 8-inch case nuts can be accessed with a socket. by the size of the nuts and thread used to retain the brake backing plates with 3/8" fine thread, while the larger bearing use 11/16" This pinion has the tapered bearings and collapsible spacer in place. Of course, if your budget allows, you can purchase an aftermarket iron case that is stronger than any factory case. Dec 1, 2011. common carrier housing found is the C7AW-E. It may not be a stock or original Ford 9 inch rear end, but it carries the originals dimensions and specs and for all intents and purposes they are still considered a Ford 9 inch. Boss 429s, 427s, 428 CJ/SCJ and the 429 cars which received the Axle code is a combination of letters and numbers stamped on a small plate/tag attached to your vehicles rear axle. earlier housings used in cars from 1957 to mid 1960s tended to be the 4. pattern in most cases differed from the car, and due to the bearing size The 1958s and 1959s have two dimples on either side of the housing and some have drain plugs. The axle was developed to replace the Ford 9-inch axle.This axle is still in production today for a variety of Ford vehicles. small bearing housing can be differentiated from a large bearing housing the axle from around the 1957 model year right up until the early 1980s Its called a 9 inch because the ring gear measures 9 inches. The fourth version did not have the N in the casting on the outside but still retained the rib structure. Original ratios are 2.47, 2.50, 2.75 or 3.0 with the 2.50 being the most common. This was offered on the 1960 F-100 truck. These third members are the strongest of the production cases and the most desired. First, you need to understand some fundamentals of the Ford axles to help guide your quest. WJ Handy Dad assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. and this style of center carrier housing is best suited for drag cars or Before you embark on the rebuild and start scouring local scrap yards and online websites, it will be helpful to understand what to look for and what to avoid in these axles. With its 2.250-inch offset, the Ford 9 inch gears hypoid distance is greater than popular competitors, most of which are at 1.5 inches or even less. The first table is the code and gear ratio. The image below shows the Safety Label of a Ford Truck. The ring gear speed sensor is shown in the upper right-hand portion of the photograph. The Ford Axle code chart is a handy tool for positraction replacements. Strange Engineerings superior line of Chrome Moly Transmission yokes are manufactured from high quality forgings and fully heat treated to achieve maximum tensile strength. the axle from around the 1957 model year right up until the early 1980s * Pro Gears are specifically designed for drag race only. A copy of the Ford Axle Code Chart is linked below in this article. We're Application Ring Gear And Pinion NL or L Axle Shaft Splines Additional Information; Ratio: Diameter of RG: WBG-E : Ford Truck '63-71 F100: 3.70: 9 in: NL: 28-WBG-F : Ford Truck '63-71 F100: 3.89: 9 in . Of the four versions of the N case, three have an actual N cast into it right above the pinion cartridge. The axle model codes are interchangeable, typically the suffixes are different for a revision change but the axle is still interchangeable with one having the previous suffix. The 1960s to 1967s still retain the dimples but also have an oil level plug in the back cover. It's . bearings, 28 and 31 splines, 57-68 passenger car and 1/2 ton truck - medium duty, stronger than Mustang Standard Ford 9 inch gear sets are primarily used in street applications. Well show you what to look for in this buyers guide. Install Kits and Gears Sets Listed By Rear End. These axles did have metal axle tags similar to the 9-inch axles but they were slowly phased out as vehicle programs were updated. There are 4 different sets of rear axles that would have come stock in 66-77 Broncos. While the iron is molten, magnesium is added to increase the shear strength of the alloy. also received the larger axle bearings housings. The Mustang Shelby GT housing is an easy one to spot, albeit rare, because it has extreme tapering of the axle tubes at the ends. 1972 and earlier, 31 spline axles have the ability to be shortened. Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. A 2-inch version is not shown. truck housings received even beefier center carrier housings and tubes, Rear ends with 3.42 gears usually come in 8.2 and 8.6-inch units, Rear ends with 3.73 gears come in 8.5 8.6-inch units Best Gear Ratio For Your GM 10 Bolt. Width: all measurements are flange to flange. This axle tag belongs to a 1977 F-150. The format has changed over the years but mostly follow this sequence:. Learn how to hook up a 1-wire alternator on your vehicle. Drag Racing 101 ~ Everything You Need to Know! medianet_versionId = "3111299"; The There are even different pinion cartridges that have been available from the various production years and models for this axle. It has been said that it has a higher 61.25 inches, 1967-1971 Comets, Cougars, Fairlanes 59.25 inches, 1967-1973 medium and big block Mustangs and Cougars, 1966-1971 Fairlanes, Torinos, Montegos, Comets, and other Dont be surprised if the tag you have does not exactly match this. - as in the Mustang line, most however never received a factory 9-inch). 31-spline carriers and "Traction Loc" style posi unit. The ring and pinion are then accessed, also from the front, by removing another 10 bolts. The Ford 9-inch is an automobile axle manufactured by Ford Motor Company.It is known as one of the most popular axles in automotive history. If the case has two verticle RIBS ,from top to Many aftermarket companies produce 9 Ford equivalent rear axles for the drag racing and hot rod industry. Also notice the part number and metal axle tag. With so many better performing aftermarket options today, there is no reason to use these marginal brakes. The additional straddle mount pocket bearing provides additional support to the pinion head during high-torque events. These axles even have a unique bolt pattern of five on 5 inches. Remember this is the RPM based on no slippage at the torque converter so your actual RPM will be different during acceleration or times when the torque converter is slipping.3.55 gear: https://amzn.to/2HMrffx3.73 gear: https://amzn.to/2r0MakF4.10 gear: https://amzn.to/2JouvuH#wjhandydad #crownvic #reargear #gearratio #DIYhttp://www.WJHandyDad.comDisclaimer:Due to factors beyond the control of WJ Handy Dad, I cannot guarantee against improper use or unauthorized modifications of this information. Roadkill Customs has evolved from local hot rod shop to online how-to magazine for budget-minded do-it-yourself hot rod builders and enthusiasts. i.e. We offer Ford Racing ring and pinion gear sets in 3.55, 3.73, 4.10 and 4.56:1 gear ratios for solid axles, as well as Motive Gear's 3.90 and 4.30:1 gear sets. and this style of center carrier housing is best suited for drag cars or Well help you determine the correct flexplate for your Chevy engine in this buyers guide. This custom axle tag was obviously hand cut as evidenced by the sharp tin-snipped-looking ends and includes DSO, for Dealer Special Order. Anyone know? the Broncos from 1966 to 1977, they stayed with the 28-spline units. 1967-1973 Mustang axles identified by wheel flange: two large holes and counter sunk center - 31 splines. 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. These variations include different-size drum brakes, disc brakes, and wheel hub arrangements. It has a square design with four rounded corners and ten bolts. You are looking for a nodular iron case, with its telltale N cast into the front or inside wall. The 9-inchs very large pinion offset of 2.25 inches requires the pinion to be straddle mounted, which refers to the fact the pinion head has bearings that straddle it on either side. The same applies to the rear differential. This particular pinion cartridge is well reinforced and much stronger than the stock production cartridge. Notice that the date code is C9UA with the ring gear size of 8.7. Our editors pick the products & services we write about. It was not the only axle used, but was by far one of same width, but the distance between spring perches is different between 1964-1971 Falcon, Comet, some 1965-1969 Mustangs or 1964-1967 Ranchero V8 cars. It was then replaced by the Ford 8.8 inch rear axle. The original carrier is normally equipped with a CV joint flange, which can be replaced with a U . Pairing your vehicle with the wrong axle components will not only damage your vehicle but cost you a lot down the line. same width, but the distance between spring perches is different between The date code is stamped on the tag. So again, unlike the GM and Dana axles that require a unique differential with different ratios, the Ford 8.8-inch differential is common across all of the ring-and-pinion ratios. are you wanting the listing for the ratio tags? 2. 3.00, 3.25, and 3.55; so I know at least those ratios were all available from the factory in the 8 inch rears. It was also used in the 1983-1996 full-size Bronco, and E150 Econoline . The Ford version uses larger axle shafts and different lube flow strategy. Builder V8 Billys 1966 Ford Fairlane Twin Turbo 427 RestoMod was built for Street and Strip. The bottom line begins with the ratio being the first set of numbers. Here is an example of such a unit. In contrast, on the 9-inch, two nuts on the bottom at about the 6 and 7 oclock positions cannot be accessed with a socket and require a wrench. 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.. 1957 . larger wheel bearing housings. by the size of the nuts and thread used to retain the brake backing plates You must confirm the flange version to be able to order the correct drum brake backing plates, disc brake conversion kit, or even the axles bearing retainer.

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