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nickel content and better casting than the earlier single ribbed cases it For a Ford 9 inch rear end, swapping gears is fairly easy as it has a removable third member. It was not the only axle used, but was by far one of I have also spent many hours in scrap yards and visiting and interviewing the experts in this field along with years of building numerous axles myself. Where A=the first number (static reduction), Bi=Gear diameter, Bf=Ring Gear diameter, Cf= (Crown Wheel dia.) wood and natural gas. But to be correct, it is a 3/4 fl oat. The straddle-mounted pinion has a roller bearing in the gear case, which provides additional support for the pinion under heavy loads. Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. The first table is the code and gear ratio. carriers, while sometime in the early 70's the switch was made to mostly Generally, aftermarket shafts have to be purchased Calculators. The same applies to vehicles with codes containing numbers alone. 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 The letters I and O are skipped to avoid confusion with the numbers one and zero. Our example is going to assume a 6000 rpm redline and 26-inch-diameter tires. 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. Here is a quick visual summary: The 1957 housings do not have dimples on them and have an oil drain plug. 13 lovely chevy 10 bolt rear end gear ratio chart. The Ford Mustang and Thunderbird used this style for a few model years. 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 Discount is automatically applied. 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The third member supports all of the gears and bearings, which allows for easier gear ratio swaps if you have multiple third members. For instance, if both the engine and transmission deliver up to 100 ft./lbs. small bearing housing can be differentiated from a large bearing housing If there is an "L" in between, you should have a locking or limited slip differential. These were used sporadically until about 1969. carriers both, as well as with the spline count on the axle shafts. 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. around 64-65 I believe.They are most often found behind the later 428CJ 1972 and earlier, 31 spline axles have the ability to be shortened. The 9-inch ring and pinion is front-loaded into the rear end housing. . There is a machined roller bearing race on the pinion head portion that points at the differential opposite thetapered bearing races. These variations include different-size drum brakes, disc brakes, and wheel hub arrangements. Many racers carry an extra carrier assembly for their 9 inch third member with a different rear end ratio so they can try different combinations on the same day while at the track. This chart references the connection between the month codes and the actual month. Nine Inch Rear Axle. Rusty but Rare 1976 Chevy K10 Sport Truck Revival! There is a ton of aftermarket support for this axle (see Chapters 3 and 4 for more details). 31-spline carriers and axle shafts. Gear ratios can be quickly changed by removing the axles and driveshaft, unbolting the . Leaf Spring: The Similarities And Differences. wheel drives) right up until about 1982, these housings are by far the much more difficult to locate. common carrier housing found is the C7AW-E. Buyers Guide. carriers both, as well as with the spline count on the axle shafts. can tell this is a 9-inch from the removable carrier on the front. 3. Ford used Learn how to hook up a 1-wire alternator on your vehicle. . The Ford Axle code chart is a handy tool for positraction replacements. Our expert customer support technicians are available Monday through Friday from 7:00 a.m. until 7:00 p.m., CST. 1. used the 9-inch rear, regardless of engine size. tubes with flat tops, 1969-1977 Galaxies (coils), Lincolns (coils), and late pickups (leaf)- 3.25 1967-1973 Mustang/Cougar - light duty, thinnest housing material, small axle version of the case came into use in 1967 or in subsequent years, but it The Ford 10.25-Inch Rear Axle Replaced The Dana 70 After 1985. The tubes do not have any welds, and you just see the witness marks of the parting line for the dies on the tubes. Both 8- and 9-inch axle housings are made from a series of stampings that are fixtured and welded together. Watch the video for all the details and you'll wonder why your shop hasn't had a set sooner! For Example: 235/45ZR-17 (235 x 0.45 x 2 25.4) + 17 = 25.327" And here's a formula that you can use to calculate your vehicle's rear axle gear ratio: RING GEAR TOOTH COUNT PINION GEAR TOOTH COUNT = GEAR RATIO. People tend to be drawn to it like a magnet. This is a great upgrade component to use for high-power applications or if you are replacing your cartridge. The date code is stamped on the tag. Refer to the Axle Ratio table to determine your rear axle ratio and Limited Slip. You will also learn how to identify the codes in Ford vehicles. There are also unique domestic special-option tags, which dont follow the format. allow larger ring gear to fit. There are even different drum brake registers. This particular pinion cartridge is well reinforced and much stronger than the stock production cartridge. Here is an example of a weld repair on a factory original housing. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. If you know your axle tag number, simply go to the second table. 1967-1973 Mustang axles can be identified by wheel flange: Oval hole = 28 splines; Two large holes and counter-sunk center = 31 splines. 66-71 Fairlanes, Torinos, Montegos, Comets, and other Ford intermediates with big blocks. 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. You can do this by multiplying by the gear ratio. for the swap to be performed. This pinion shows excessive wear on the trunnion surface and should not be re-used. The 10,41 gear ratio is also great for off-road activities . Many aftermarket companies produce 9 Ford equivalent rear axles for the drag racing and hot rod industry. The certification plate can be located on the lock face of the left door edge. There are a few exceptions that you will see in the Ford Axle code chart. used the 9-inch rear, regardless of engine size. 1967-1973 Mustang axles identified by wheel flange: two large holes and counter sunk center - 31 splines. It is common to find a 9-inch in a old Falcon or 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. Like the H in our case shows a car with a limited-slip differential. Now you can see the C4AW-4025-B part number on the lower left unit, which verifies it as a nodular unit. In most cases, the tag has been lost. Richmond Tech Support. The code, 4L11, tells us that it is a 4.11:1 ratio with a limited-slip or Traction-Lok differential. These third members are the strongest of the production cases and the most desired. To determine the axle ratioof your vehicle, locate thetwo-digitaxle code first, then use your vehicle'stowing guide to find the axle ratio that corresponds to that code. The most This will ensure that the correct replacement parts are purchased or salvaged from a junkyard to be used in the vehicle. 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. We stand behind our products with some of the smartest technicians in the industry. truck housings received even beefier center carrier housings and tubes, This complex fixturing and welding process, coupled with fuel economy concerns, is what eventually led to their production demise. Your email address will not be published. I had an early '70's Lincoln with a 460 come into the shop one time and it had the 2.33:1 ratio in a 9 inch. most abundant. The ranger truck works good with a 9-inch from a Here is the step by step guide: The Safety Standard Certification/ Safety Compliance Certification label is located on the door pillar of the left driver seat of your truck. 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.. Axle Ratio : Axle Ratio : Diesel: 5.13: 4.10: 3.55: Gas: 4.10: 3.55 : Trans Ratio: . Comet that has had a HIPO SMALL block with 31-splines and a locker. Exceptions to this were the ultra Hi performance Boss 302s, carriers, while sometime in the early 70's the switch was made to mostly Performance Front & Rearends GM Vehicles The engines flexplate is a critical part to transferring power to your drivetrain. The "rough" mind as mentioned, the Fairlane spring perch distances were not the same Some differential experts tell you that the Blue Oval engineers copied the 12-bolt design when they came up with the 8.8-inch axle. Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. 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. From the arrow, you can see the axle code is H9. 6. A strong 9" with a nodular diff and 31 spline axles is fairly comparable in strength to a stock Dana 60 rear end. Since the "Limited slip" or Locking rear end 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. 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. This custom axle tag was obviously hand cut as evidenced by the sharp tin-snipped-looking ends and includes DSO, for Dealer Special Order. This bearing and the casting structure surrounding it need to be carefully inspected as this is a common area for cracks. It was required to repair a leaking weld. From my piles of rare parts, here is an independent cast-iron 8.8-inch carrier axle. These used what is referred to as a It features the legendary Ford 9-inch ring and pinion strength, 5-on-5.5 lug pattern (same as older Jeep), a 65-inch width at the wheel mounting surfaces, large-bearing semi-floating axles, and many can be found with hefty 31-spline axleshafts. Filed Under: Ford Tech Tips, Rebuild Ford Differentials, The Best Ford Tech Articles, 2023 DiY Ford. many half ton trucks continued to utilize the 9-inch (both 2 wheel & 4 Note the two lower bolts at 6 and 7 oclock have straight access with a socket. 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). This bearing is one of the reasons that the 9-inch has the reputation for being bulletproof. These first became available on the 1964 Galaxies with the 427-ci engine and were found on many higher horsepower cars and trucks. The larger offset is better for strength and noise but worse for sliding and efficiency. larger wheel bearing housings. 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. With the chart in hand, locate your vehicles axle code on the axle code column. These tags were not that informativeon the early units, so from 1957 to 1962 the tag just referenced axle ratio. If your vehicle has a Limited Slip Differential, it will be noted as Limited Slip. many half ton trucks continued to utilize the 9-inch (both 2 wheel & 4 The answer lies in several of the Ford 9-inchs design aspects, starting with the Ford 9 inch gears. 4. This pinion has the tapered bearings and collapsible spacer in place. 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 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. 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. type, 28 and 31 splines, Ranchero/Torino - heavy duty thick wall housing, 3.25 inch diameter axle The Ford version uses larger axle shafts and different lube flow strategy. them. medianet_versionId = "3111299"; The This is a major advantage compared to other rear axle systems because disassembly is faster and more convenient. The Ford 9-inch has a reputation as a durable axle that can transmit enormous torque, and this is rightfully deserved. Find the word AXLE under the bar code. Ford non-overdrive transmissions include: C-4, three-speed, automatic. 5.4L (including Lightning) and some 44 super cabs and higher GVWR models which were equipped with the heavier-duty 9.75-Inch rear axle. "N There are 4 different sets of rear axles that would have come stock in 66-77 Broncos. "N Case" was no longer needed for passenger car/truck Careful aftermarket shops and their stringent attention to repairing these housings are able to correct many of these issues. Bolt-In 9 Inch Ford Rear Housing for 1967-72 GM Pickup Trucks, Speedway Centered Housing Ford 9 Inch Axle Kit, 58 Inch Width, Fabricated 9 In Ford Rear Axle w/ Posi Traction 3rd Member, 58 In, 9 Inch Ford Cut-to-Fit Axle with Bearing, Big Ford/New Style, Ford 9 Inch Gear-Style Posi Differential Third Members, Ford 9 Inch Bolt-On Rear Disc Brake Kit w/ E-Brake Caliper, Driven 04230 75W90 Limited Slip Gear Oil Change Kit, Ford 9 Inch, CarTech SA170 High-Perf.