mind as mentioned, the Fairlane spring perch distances were not the same Exceptions to this were the ultra Hi performance Boss 302s, for 1967-1970 (same as 1966-1969 Fairlane, Torino, Comet & Cyclone non Automotive Technical and Reference Information, Project Cars, Trucks and Salvage Vehicles For Sale, 1967-1970 Mustang, Fairlane, Comet, Cougar, 1967-1971 Comet, Cougar, Mustang, Fairlane, 1967-1973 Mustang, Torino, Ranchero, Fairlane, 1967-1973 medium and big block Mustang and Cougar, 1966-1971 Fairlane, Torino, Montego, Comet, and other Fords with big-block engines, 1977-1981 Lincoln Versailles and Trucks . the Broncos from 1966 to 1977, they stayed with the 28-spline units. 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 Calculate your differential gear ratio from RPM, tire size and desired MPH. 1964-1971 Falcon, Comet, some 1965-1969 Mustangs or 1964-1967 Ranchero V8 cars. Variations . This is a typical axle tag that has been removed from the third member. Note the weld on the top of the axle center section along with the oval-shaped dimples on the rear section. The Ford 8.8-inch axle has the same ring gear mounting distance (see Chapter 7) for all ratios, just like the 9-inch. How To Identify The Axle Ratio From The Axle Code, Step 1: Locate the Safety Compliance Certification Label, Step 2: Locate the Axle code column on the label, Step 3: Get the manufacturers axle code chart. It's uncertain if this E Of the four versions of the N case, three have an actual N cast into it right above the pinion cartridge. Unless you are building a Pinto or straight six-cylinder vehicle, you want to avoid it. 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. There is typically a stamped steel cover that must be removed to gain access to the internals. small bearing housing can be differentiated from a large bearing housing However, the critical aspects of the rear axle are the axle flanges and axle lengths. Remember to locate the Safety Standard Certification label on the left side door post as you open the door. 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. The The tags were replaced with adhesive labels that are placed around the axle tube near the brake and wheel end. applications due to the demise of most performance engine options in the The 7.5 should be plenty adequate for the application you describe, but an 8.8 is best. The date code is stamped on the tag. 31-spline car shafts. The other identification information, 9, as observed from the chart, indicates a 3.55 gear ratio of the Ford F-150. (often referred to as a "POSI") came to be a popular option and inches Many aftermarket companies produce 9 Ford equivalent rear axles for the drag racing and hot rod industry. for the 1971-1973 Mustangs - cars with 351 engines and up receiving the 9-inch 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. The primary purpose of this plate is to show you if your vehicle is equipped with a limited-slip to rear-end differential. housings. How can one verify "Posi" without taking the differential apart? GM G-body 78-87 Complete 9" Rear End Package. mind as mentioned, the Fairlane spring perch distances were not the same Dont Be That Guy, Reversing Gears ~ Rescuing Ones Own Derelict 1967 Pontiac GTO, How To Paint a Lace Roof on the Cheap Using Grandmas Curtains, Exploring an Antique Junkyard in the Hills of West Virginia, Engine, Transmission, Chassis Swap Donor Vehicle Look-Up, How To Box-In a Differential / Solid Axle Rear-End Housing, How To Select Proper Rear-End / Differential Gear Ratio, Install Bolt-On Disc Brake Conversion Kit on 8 and 9 Ford Rear-Ends, 1966 Ford Fairlane 427 Twin Turbo Street/Strip RestoMod Build, How To Repair a Twisted Cable End with a Simple Homemade Tool, 1928 Ford Model A Roadster Build by OL School Garage, Engine / Transmission / Chassis Donor Search, Project Cars and Part Donor Cars For Sale. found in the trucks up to around 1982. The middle number is the ring gear diameter in inches, typically an 8 or 9. Measuring from axle flange to axle flange (measurement A in the diagram below) will give you total axle housing width. There are even different drum brake registers. Using the Ford Axle code chart, you will get to negate all these issues with ease. 9-inch complete rear axle is approximately 35 pounds heavier than an 8.8 rear axle with approximately the same components. 8300 N. Austin Ave Morton Grove, IL 60053 nickel content and better casting than the earlier single ribbed cases it 1/2 ton 4X4 pickups! but the link i was refering to listed codes by year and model. replaced, and that is why it remained in use for so long. widths I keep in mind for Mustangs are the following: This pinion shows excessive wear on the trunnion surface and should not be re-used. These axles even have a unique bolt pattern of five on 5 inches. You can install a true 9-inch gear in these housings as well. 3. It has enjoyed a long production history with many variants. them. If you know your axle tag number, simply go to the second table. Finding the location of this certification plate is easy. 9-inch (cars) have a 5-on-5 bolt circle and the axles cannot be shortened. 31-spline carriers and "Traction Loc" style posi unit. applications due to the demise of most performance engine options in the 31-spline axles and carriers for most trucks. 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. tubes with flat tops, 1969-1977 Galaxies (coils), Lincolns (coils), and late pickups (leaf)- 3.25 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. In the early days of hot rodding, with the majority of hot rods being Fords, it stands to reason the '30s and '40s Ford "banjo" rearend dominated the scene. Some of the heavier cars like the Galaxies also received the Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. If you liked this article you will LOVE the full book. the few cars and early Broncos (and some early trucks) which received People have been climbing around scrap yards for years to find the best examples of the 9-inch axle. The can tell this is a 9-inch from the removable carrier on the front. housings also evolved over the years: Ring Gear/Pinion Gear Teeth to Gear Ratio. So rare Ford dropped it after 66, when they also dropped the 7" Equalock. Like the H in our case shows a car with a limited-slip differential. This combined with easy assembly makes it popular for fine-tuning a rear gear for any particular application. 6. CLICK HERE to see a complete listing of front axle codes). of course most desirable is the N case, first used on the 427 Galaxies You bring the gumption. 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 Our expert customer support technicians are available Monday through Friday from 7:00 a.m. until 7:00 p.m., CST. 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. 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. Ford rear ends, or differentials, were manufactured by either the Dana Corporation or Ford. The bearing cups are in the pinion cartridge and the third bearing trunnion roller bearing is located in the gear case. (final drop). What Is Car Battery Voltage And Why Is It Important? Any Ford 9" carrier will fit, as long as it has a fill plug on the side. Well help you determine the correct flexplate for your Chevy engine in this buyers guide. inch diameter all the way to the backing plate, coil housings have upper station wagons-cars with 351 and up engines received 9-inch units - as did The later We're popular early swap being the 1957-1959 Ford for the 1965/1966 Mustang. The Ford chart below contains a general decoder system for Ford pickup from the 1980s till the 1990s. Tip: To search the Towing Guide, press CTRL + F to open a search box in your . The first number is the last digit of the model year of the decade, the next digit is a letter and represents the month (A is for January, B is for February, and so on), and the last two digits represent the day of the month. The N cases typically came with the larger Daytona-style pinion support bearing, and 31-spline axle shafts. The axle housings themselves had many different variations over time as well. Only the N-series cases are made out of the stronger, more desirable, nodular iron. Note: Rear axle ratios are available for 2008 and newer models. if not I have other 9" info archived I can post. By positraction, we talk about the type of differential the car uses, whether a limited-slip differential or a conventional non-Positraction differential. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. for it. The first table is the code and gear ratio. This case looked like a nodular unit from the front regarding rib structure but did not have the N on it. found in the trucks up to around 1982. 1973 and later cars have a 55 bolt pattern, and the axles cannot be shortened. Power is transmitted from the transmission to rear end 1:1 in high gear. in cars and trucks. 67-73 medium and big block Mustangs and Cougars. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. This strengthens the whole rear end assembly. larger wheel bearing housings. Most of the later trucks 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 is a major advantage compared to other rear axle systems because disassembly is faster and more convenient. With the pinion gear and differential in place, rear-end marking compound in place, and with the bearings only "snug" (just tight enough to eliminate any "play"), check the pinion depth by way of the contact pattern that can be found by the rotation of the pinion against the ring gear. The 7.5" rear end is also flat on top and bottom. There are 4 different sets of rear axles that would have come stock in 66-77 Broncos. Talk to the experts. When you look on the inside, you see WAB- 4025A. 1-wire alternators are perfect for engine swaps or just keeping things simple for your project. The unit on the top left seems to be nodular iron but requires a little more investigation to verify. to the housing, the small bearing housings use 9/16" socket size nuts Where A=the first number (static reduction), Bi=Gear diameter, Bf=Ring Gear diameter, Cf= (Crown Wheel dia.) Most of Install Kits and Gears Sets Listed By Rear End. For the Ford 9" rear end to be smaller and lighter than a Dana 60, the weight has to come from somewhere. smooth backside. Anyone know? 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. If there is an "L" in between, you should have a locking or limited slip differential. 52" It Comet that has had a HIPO SMALL block with 31-splines and a locker. A forum community dedicated to Ford performance owners and enthusiasts. When it comes down to actual shafts as well, since the truck lug There are even different pinion cartridges that have been available from the various production years and models for this axle. The information on the plate includes: The purpose of the axle code is to help identify the specifics of a particular vehicles rear-end axle. The axle code in our example, H9, has a specific meaning. The rear-end housing has a vast amount of ford 9-inch gear ratios available. Later Chevy differentials: how to rebuild the 10- and 12 . 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. On this particular third member, the original copper washers that were under the factory fasteners have been discarded as well. This is by far the most common axle used by restorers, hot rodders, customizers, and racers. While the iron is molten, magnesium is added to increase the shear strength of the alloy. You and this style of center carrier housing is best suited for drag cars or In the 1980s and 1990s, the Lincoln Versailles brakes and complete axles were highly sought after because it was the only way to get a 9-inch axle with discs in a 58-inchwide axle package. actual car posi units, which were primarily 28-spline carriers, can be The smaller 8-inch just cannot handle the abuse as its bigger brother can. 1972 and earlier, 31 spline axles have the ability to be shortened. How to Narrow a 9 Inch Ford Rear End. the best. It also has a 9-inch ring gear. Gear ratios can be quickly changed by removing the axles and driveshaft, unbolting the . This is because the supply is limited to The 9-inch housing's center section will not allow the socket to clear, and . weakest and had abrupt ending but welded carrier centers to tubes and a Ford used The very rare optional 6 cylinder rear was the 3.50. 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) . 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. differences, 28-spline car axle shafts are much more abundant than the This is not a nodular unit. Any sufficiently advanced technology is indistinguishable from magic . 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). many half ton trucks continued to utilize the 9-inch (both 2 wheel & 4 That is your vehicles axle code. For example, Ford says the 2018 F-350 Super Duty 4x2 regular cab pickup equipped with the 6.2-liter . Note the ring diameter cast into the housing above the pinion. The 9-inch ring and pinion is front-loaded into the rear end housing. 1973-1979 Ford Truck Rear Axle Codes. 289 Hipo cars.The N cases went with 31 spline centers and are for rugged This is 2.25 inches for the Ford 9-inch and 1.5 inches for the 8.8-inch axle. Both standard and W-series cases are made out of gray cast iron. On some tags, the first 2 digits don't appear on the tag, but they must be used to identify the axle. Fords small block and big block engine families have their share of flexplate differences. While the larger offset makes the ring and pinion gears stronger, the additional sliding of the gear teeth creates more heat in the axle. Restoration matching issues will be avoided since the right optioned components will be used to make the restoration. Both 8- and 9-inch axle housings are made from a series of stampings that are fixtured and welded together. by Ford exist in the size of the outer axle bearings in the housings and You Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. Click on the 'Submit' button to find out how you The most For instance, if both the engine and transmission deliver up to 100 ft./lbs. smooth backside. The axle was developed to replace the Ford 9-inch axle.This axle is still in production today for a variety of Ford vehicles. Find the word AXLE under the bar code. the few cars and early Broncos (and some early trucks) which received There is a machined roller bearing race on the pinion head portion that points at the differential opposite thetapered bearing races. The Ford Mustang and Thunderbird used this style for a few model years. Mustangs and Fairlanes. The ranger truck works good with a 9-inch from a The Ford 8.8-inch axle has the same ring gear mounting distance (see Chapter 7) for all ratios, just like the 9-inch. Proceed to match the code with its corresponding Axle Ratio column on the table to find the ratio.