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. Here is a quick visual summary: The 1957 housings do not have dimples on them and have an oil drain plug. The magnesium addition causes the grain structure to change from flakes to nodules and thus the name nodular iron. Find your transmission and rear gear multiplier below. If you are fortunate enough to find an axle with the identification tag still attached, it will help solve part of the mystery of what application the axle came from and what might still be inside. Any of the W-series cases do have a fill plug machined in them. 77-81 Lincoln Versailles. allow larger ring gear to fit. Code Application Ring Gear And Pinion NL or L Axle Shaft Splines Additional Information; Ratio: Diameter of RG: WGA-A: Lincoln Mark Series '69-'71 Thunderbird '69-70: 2.80: 9 3/8: NL: 31-WGA-B: Lincoln Mark Series '69-'71 Power is transmitted from the transmission to rear end 1:1 in high gear. 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. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. The 9-inch housing's center section will not allow the socket to clear, and . pattern in most cases differed from the car, and due to the bearing size
for the 1971-1973 Mustangs - cars with 351 engines and up receiving the 9-inch
The Ford Mustang and Thunderbird used this style for a few model years. Because
of torque to the pinion gear and the gear ratio of the ring-and-pinion is say 4.12:1, the output torque is 412 ft./lbs. We have a large selection of gear sets in stock and can recommend the correct . Boss 429s, 427s, 428 CJ/SCJ and the 429 cars which received the
But the 9" is better in a couple respects: It's much lighter than a Dana 60. truck housings received even beefier center carrier housings and tubes,
The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. (final drop). 2. The axle was developed to replace the Ford 9-inch axle.This axle is still in production today for a variety of Ford vehicles. The Ford Axle code chart is a handy tool for positraction replacements. Discount is automatically applied. The first table is the code and gear ratio. Dont be surprised if the tag you have does not exactly match this. found in the trucks up to around 1982. Some even consider these axles to be bulletproof. 31-spline axles and carriers for most trucks. An assortment of Ford 9-inch axle stampings is welded together to create the housing. Many companies, such as Currie Enterprises, Mark Williams Enterprises, Moser Engineering,and Strange Engineering, reproduce this design today. These tags provided information for the service technicians but wasnt that important for the vehicle assembly plants. Using the Ford Axle code chart, you will get to negate all these issues with ease. 76-77 large bearing. . and this style of center carrier housing is best suited for drag cars or
only need to carry one spare should you choose to. Generally most cars received the small axle bearings and 28-spline axle
Ironically, 8.0-inch independent carriers were made in cast iron. The 1960s to 1967s still retain the dimples but also have an oil level plug in the back cover. The Ford 8.8 is an automotive axle manufactured by Ford Motor Company at the Sterling Axle Plant in Sterling Heights, MI.It was first used in model year 1983 Ford trucks. 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. These axles did have metal axle tags similar to the 9-inch axles but they were slowly phased out as vehicle programs were updated. 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. Again, the overall first-gear ratio with the TH400 and 4.10:1 rear gear would be 10.168:1. This is 2.25 inches for the Ford 9-inch and 1.5 inches for the 8.8-inch axle. housings appeared in either 1966 or 1967 with the familiar "Hump"
In order to verify a nodular unit, you need to look on the inside of the casting. This pinion shows excessive wear on the trunnion surface and should not be re-used. The Ford 9-inch has a reputation as a durable axle that can transmit enormous torque, and this is rightfully deserved. in the backside middle and stronger tubes. When it comes down to actual shafts as well, since the truck lug
Visit the RV & Trailer Towing Guides page on the Ford fleet website. there is the letter "N" than this is a NODULAR CASE (GREAT) this
for 1967-1970 (same as 1966-1969 Fairlane, Torino, Comet & Cyclone non
Axle Ratio = (RPM X Tire Size)/ (Speed (MPH) X 336) Example 4.88 = (2881 X 37)/ (65 X 336) 59.25 inches to 61.25 inches, 1957-1959 Ranchero and station wagon rears, 57.25 inches, 1967-1971 Comet, Cougar, Mustang, Fairlane, 59.25 inches, 1967 Fairlane 63.50 inches (coil springs), 1957-1959 Ranchero and station wagon 57.25
in the backside middle and stronger tubes. it was very complete. The same applies to the rear differential. So rare Ford dropped it after 66, when they also dropped the 7" Equalock. Generally most cars received the small axle bearings and 28-spline axle
Only the N-series cases are made out of the stronger, more desirable, nodular iron. $(document).ready( function () {$('#dtTable').DataTable( {paginate: false} );} ); 1954 Ford F100 / 2000 Lincoln Towncar Chassis Swap for Under $1,000, Tire Width Minimum, Maximum, and Ideal Size Chart by Wheel Width, An Online Magazine for DIY Hot Rod Builders. This is an example of the brakes that fi t the small wheel end bearing for a 10 x 2-inch-wide drum brake on the left and a 10 x 1-inch on the right. Due to factors beyond the control of WJ Handy Dad, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Applications: Ford Used The Dana 70 And Dana 70HD Axles In F-350 Trucks Up To 1985.5. The Ford 10.25-Inch Rear Axle Replaced The Dana 70 After 1985. For example: The tag will say: 350 for 3.50:1 ring and pinion gear ratio. used the 9-inch rear, regardless of engine size. It was then replaced by the Ford 8.8 inch rear axle. 1957 . The engines flexplate is a critical part to transferring power to your drivetrain. 1972 and earlier, 31 spline axles have the ability to be shortened. (The third digit of the axle code identifies the ratio and/or capacity of the front axle, if applicable. Tip: To search the Towing Guide, press CTRL + F to open a search box in your . is by far the most abundant case being used in both full size Ford cars
carriers, while sometime in the early 70's the switch was made to mostly
There may be other labels attached to that pillar so pay attention to one that looks similar to the one below. It may seem strange to begin by comparing the 8-inch to the 9-inch axle, but there is an important distinction to make since the 8-inch axle is weaker than the 9-inch. The Lincoln LS and Jaguar S-type were equipped with an 8-inch, castaluminum, independent- style carrier. (CROSS SECTION WIDTH x 0.ASPECT RATIO x 2 25.4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER. The N cases had two vertical ribs, three horizontal ribs, and a machined-in fill plug. Our aluminum cases are manufactured from premium material sourced in the USA, designed and machined in-house, and offered in various forms to meet the requirements of the most demanding applications. Most of the time, the differences are in shock and spring mounting brackets and, of course, brake hardware. 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. 800-646-6718. also received the larger axle bearings housings. Now you can see the C4AW-4025-B part number on the lower left unit, which verifies it as a nodular unit. The letters I and O are skipped to avoid confusion with the numbers one and zero. 3. Fords 9 inch rear axle was produced from 1957 through 1986 and was installed in nearly every Ford passenger car and truck at one time or another. if one wants to use a 31-spline truck carrier in a car. This is a typical axle tag that has been removed from the third member. medianet_width = "300";
medianet_versionId = "3111299"; The
The 8.8" rear end is flat on the top and the bottom as well as the left and right. Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. This chart serves as a general guideline for axle fl ange-to-fl ange width based on different models and production years. The LS swap is no doubt still going strong, but if youre planning to run an automatic behind your 4.8, 5.3, or 6.0L LS-powered ride, youll need to pay attention to a few items we discuss in this buyers guide. other Ford Ranger enthusiasts. The
This custom axle tag was obviously hand cut as evidenced by the sharp tin-snipped-looking ends and includes DSO, for Dealer Special Order. Proceed to match the code with its corresponding Axle Ratio column on the table to find the ratio. When measuring from the top left bolt to the bottom left bolt, the 8.8" rear end will measure 11" from bolt to bolt. This consists of the Ford Pickup F100 lineup till the Ford F350 lineup. It is a column with the label AXLE on top and the Axle Code at the bottom. These were used sporadically until about 1969. Here is a down-and-dirty way of picking the best gearing for a particular car from three choices: 3.07:1 final drive with a wide-ratio transmission, a 3.07:1 final drive with a close-ratio transmission, and a 3.36:1 final drive with a close-ratio transmission. That is your vehicles axle code. 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. While the iron is molten, magnesium is added to increase the shear strength of the alloy. and Fairlane axle housings are often grouped together because they are the
All of the 8-inch case nuts can be accessed with a socket. can tell this is a 9-inch from the removable carrier on the front. This is because the supply is limited to
When you look on the inside, you see WAB- 4025A. Axle Size/Strength Chart; Explained Videos; Tech Articles; 9-Inch Ford. Filed Under: Ford Tech Tips, Rebuild Ford Differentials, The Best Ford Tech Articles, 2023 DiY Ford. As part of my research, I went to renowned Currie Enterprises and gathered one of just about every different 9-inch axle variant. if so is this what you are looking for. This case looked like a nodular unit from the front regarding rib structure but did not have the N on it. People have been climbing around scrap yards for years to find the best examples of the 9-inch axle. Ranger
Dive into some of the history and unique differences between Ford and Chevy spindles for solid front axles and what will perform best on your hot rod. The case
weakest and had abrupt ending but welded carrier centers to tubes and a
It can also help in identifying the axle ratio of your particular vehicle. When narrowing a Ford 9 inch rear end, the first step is determining the overall length you need. Some of this information is very important as it is becoming more and more difficult to find documentation on axles and differentials that were built more than 40 years ago. This is when making a few phone calls to reputable axle builders can be helpful. widths I keep in mind for Mustangs are the following: 52"
Remember to locate the Safety Standard Certification label on the left side door post as you open the door. Read more: Torsion Axle Vs. Watch the video for all the details and you'll wonder why your shop hasn't had a set sooner! GM B-Body Complete 9" Rear End Packages. of course most desirable is the N case, first used on the 427 Galaxies
narrowed rear ends due to the added strength in the middle. First, you need to understand some fundamentals of the Ford axles to help guide your quest. What Is Car Battery Voltage And Why Is It Important? The middle number is the ring gear diameter in inches, typically an 8 or 9. A simple formula to calculate Gear Ratio or Axle Ratios. Torsion Axle Vs. the few cars and early Broncos (and some early trucks) which received
Here is an example to help you through. I reference these axles based on the ring gear nominal outside diameter in inches. Why is the Ford 9in rear end the go to rear axle for street and strip builds for over 70 years? nickel content and better casting than the earlier single ribbed cases it
Of the four versions of the N case, three have an actual N cast into it right above the pinion cartridge. 13 lovely chevy 10 bolt rear end gear ratio chart. Ford Axle codes help identify the vehicles positraction as well as an axle to gear ratio. Rusty but Rare 1976 Chevy K10 Sport Truck Revival! around 64-65 I believe.They are most often found behind the later 428CJ
The small are 2.835" or just under 3" and the large are 3.150" or just over 3". The desirable N-style, nodular-iron gear cases are available in four different versions. However, the critical aspects of the rear axle are the axle flanges and axle lengths. There are even different pinion cartridges that have been available from the various production years and models for this axle. This format is also applicableto casting date codes. the best. There were many instances of cuts and scratches from the thin steel tags sticking up on the axles. The center section is the differential assembly. for 1965-1966 (the same width as 1964-1965 Falcons and 1962-1965 Fairlanes
It is as easy to cut down as any other 8 or 9 inch Ford axel. Exceptions to this were the ultra Hi performance Boss 302s,
by the size of the nuts and thread used to retain the brake backing plates
By positraction, we talk about the type of differential the car uses, whether a limited-slip differential or a conventional non-Positraction differential. features the legendary Ford 9-inch ring and pinion strength, 5-on-5.5 lug
mind as mentioned, the Fairlane spring perch distances were not the same
applications due to the demise of most performance engine options in the
by the size of the nuts and thread used to retain the brake backing plates
This is a great upgrade component to use for high-power applications or if you are replacing your cartridge. Spring perches must be cut and re-welded in order
The axle housings themselves had many different variations over time as well. 1967-1973 Mustang axles identified by wheel flange: two large holes and counter sunk center - 31 splines. Leaf Spring: The Similarities And Differences. 56"
For instance, if both the engine and transmission deliver up to 100 ft./lbs. All the Galaxies I have seen from throughout the 1960s
Walk any automotive event and theres a darn good chance that any hot rod or muscle car you peek under is going to be sitting on a Ford 9-inch housing. housings. . It is still used in NASCAR racing as well. Here is an example of a weld repair on a factory original housing. Mustangs and Fairlanes. The
dimples. If your vehicle has a Limited Slip Differential, it will be noted as Limited Slip. 1958-1959 two dimples on the back of housing, flat center band, some had drain holes. The close-ratio and C4 289HP trans were mated to the 3.50, and occasionally to the 3.89 and 4.11. nickel content and better casting than the earlier single ribbed cases it
People tend to be drawn to it like a magnet. to the housing, the small bearing housings use 9/16" socket size nuts
Axle
There are a few exceptions that you will see in the Ford Axle code chart. 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. 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) . There are several reasons for this. Additionally, the Ford 9-inch utilizes a removable center section, often referred to as the Ford 9-inch pumpkin, Ford 9-inch chunk, Ford 9 inch third member, or even a Ford 9-inch pig! 31-spline car shafts. Thanks. The aftermarket Daytona-style pinion cartridge accommodates the larger and stronger pinion head bearing. many half ton trucks continued to utilize the 9-inch (both 2 wheel & 4
them. The axle identification tag is located at about the 3 oclock position under the third-member mounting nut when you are looking straight at the front of the axle. WJ Handy Dad recommends safe practices when working on vehicles/homes and or with tools seen or implied in this video. and trucks throughout the 1970s. Identifying a differential hinges the ability to distinguish the two primary rear-end types---the 8- or 9-inch rear end---denoting ring-gear size. The WAR, WAA, and WAB cases have the same ribbing as the N case, but are missing the ever important N feature. The third member supports all of the gears and bearings, which allows for easier gear ratio swaps if you have multiple third members. housings also evolved over the years:
Written by Joe Palazzolo and Republished with Permission of CarTech Inc. You
Well show you what to look for in this buyers guide. There was a desire to have the stronger, larger tubes near the center of the axle but still retain the narrower tube ends for the wheel ends and the unique Shelby suspension brackets. Content. Also notice the part number and metal axle tag. The rear end width is important on shoebox Fords if you want some selection on wheels. always looking for good content to share with
Strange Engineerings superior line of Chrome Moly Transmission yokes are manufactured from high quality forgings and fully heat treated to achieve maximum tensile strength. Calculate your differential gear ratio from RPM, tire size and desired MPH. Measuring for your 9-inch axles requires a few basic measurements to be taken. 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. Original gear ratios range between 2.79:1 and 5.43:1, and aftermarket replacement gears are available for many ratios as well. There is a ton of aftermarket support for this axle (see Chapters 3 and 4 for more details). trucks varied more, early half ton trucks got the 28-spline axles and
FMX, three-speed, automatic. 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. The
shafts. Finally, using bearing retainers that secure the axle at the flange, versus a C-clip style that secure the axles at the differential, means in the case of axle failure the axle flange and wheel will stay with the housing and not leave the vehicle, potentially causing brake failure and lack of control on the racing surface. The Ford 9 inch rear end is one of the most popular axles in automotive history. Your email address will not be published. 1964-1971 Falcon, Comet, some 1965-1969 Mustangs or 1964-1967 Ranchero V8 cars. The 9-inch ring and pinion is front-loaded into the rear end housing. This larger offset (hypoid distance) between ring-gear and pinion-gear centerlines is the key reason the Ford is inherently strongerbut also why its slightly less efficient. The
earlier housings used in cars from 1957 to mid 1960s tended to be the
can get your submission posted and acknowledged
The answer lies in several of the Ford 9-inchs design aspects, starting with the Ford 9 inch gears. (often referred to as a "POSI") came to be a popular option and
Part Category: Disc Brake Rotor and Hub Assembly.1999 Ford Ranger Rear Axle Assembly 7.5 RING GEAR, 9 BRAKES, 4.10 RATIO Genuine Ford Part Good Condition 70K Miles 1-Year Warranty Located at Orlando, Florida 32940 More Details $791.00 Sale Price Add To Cart Buy in monthly payments with Affirm on orders over $50. Ford non-overdrive transmissions include: C-4, three-speed, automatic. Richmond Tech Support. This was an 8.75- inch ring gear in a 9-inch housing. Cost and complexity are two. Width: all measurements are flange to flange. large-bearing semi-floating axles, and many can be found with hefty 31-spline
These third members are the strongest of the production cases and the most desired. Give us a call at 800-216-1632 to get started. as the Mustang. socket size and 7/16" fine thread. We stand behind our products with some of the smartest technicians in the industry. The WFE-V2 helps us fi nd the decade of the 1970s. There are even different drum brake registers. You will also learn how to identify the codes in Ford vehicles. A
SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read. pattern (same as older Jeep), a 65-inch width at the wheel mounting surfaces,
by Ford exist in the size of the outer axle bearings in the housings and
Would very much apreciate it if someone would post it again. version of the case came into use in 1967 or in subsequent years, but it
Notice the 8.0-inch ring gear diameter cast into the rear cover below the fill plug. These axles had a stout 2.25-inch ring gear offset as compared to a 1.5-inch ring gear offset of the later 8.8-inch axle. 9-inch (cars) have a 5-on-5 bolt circle and the axles cannot be shortened. How to Narrow a 9 Inch Ford Rear End. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. This bearing is one of the reasons that the 9-inch has the reputation for being bulletproof. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Some of the 9-inch truck differentials will have an exaggerated hump on the rear cover to . There are three versions with external Ns cast in; note the more curved style on the top right. "N Case" was no longer needed for passenger car/truck
Axle
. - as in the Mustang line, most however never received a factory 9-inch). See all 20 photos. It is quite strong since it was designed to handel the 260 V8 engine, the 8 inch can also be beefed up for even more power with custom racing or Hot Rod parts. We can teach you some of the major differences between the Ford and GM-style T5 Flathead transmission adapter kits. There are a few exceptions that you will see in the Ford Axle code chart. Well help you determine the correct flexplate for your Chevy engine in this buyers guide. T & C FORD TOP LOADER 4 SPEED WIDE RATIO 2ND GEAR 31 TOOTH showing . I'm not responsible for incorrect information, Width: all measurements are flange to flange, Ford Rear Axle Assembly Identification - Page 01 - FORDification.com. And you can find the axle code charts on the internet from your manufacturer. Most 1972 and earlier 31-tooth spline shafts can be shortened and 1973 and later versions typically cannot be resplined. It
Ford Rear Axle Assembly Identification - Page 01 . So dont be surprised that most of these axles leak from the welds. This combined with easy assembly makes it popular for fine-tuning a rear gear for any particular application. 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. . As you proceed to the Ford Axle Code chart, you will notice that the table indicates it has a Ford 8.8 Limited Slip Differential with an Axle Ratio of 3.55. The same applies to vehicles with codes containing numbers alone. 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. For the Ford 9" rear end to be smaller and lighter than a Dana 60, the weight has to come from somewhere. This is an example of the only Ford 9-inch version that utilized one-piece tubes. This is a sampling of some of them. Some of the heavier cars like the Galaxies also received the
74-75 medium duty large bearing, and. 3. Ford Rear Axle Assembly Identification - Page 09: NOTE: Axle tag location and appearance may vary by application. differences, 28-spline car axle shafts are much more abundant than the
For reference, this section from the Ford MPC is posted . Its called a 9 inch because the ring gear measures 9 inches. Like most Ford axles, the 9-inch has a single hypoid ring gear mounting distance, so, unlike the Dana and GM axles that require unique differential carriers based on ratio, a single differential carrier works with all of the Ford ratios. We offer a guide to follow when selecting a new set of brake pads for your race or street car. 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.
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