The axle code in our example, H9, has a specific meaning. Give us a call at 800-216-1632 to get started. The instructions below will walk you through the steps. Calculating the torque multiplication that your axle gears provide is quite easy. The primary purpose of this plate is to show you if your vehicle is equipped with a limited-slip to rear-end differential. Calculate Rear End Gear Ratio Needed - speedmaster79.com Most of 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. can tell this is a 9-inch from the removable carrier on the front. 74-75 medium duty large bearing, and. determine which axle housing many cars and trucks received. Again, the overall first-gear ratio with the TH400 and 4.10:1 rear gear would be 10.168:1. "N Case" was no longer needed for passenger car/truck A 31-spline carriers and "Traction Loc" style posi unit. On this particular third member, the original copper washers that were under the factory fasteners have been discarded as well. the Broncos from 1966 to 1977, they stayed with the 28-spline units. Projector vs. Reflector: Plan to upgrade your headlights? The best gear ratio for a GM 10 bolt is 10,41 because it is the only ratio that allows your engine to turn 10,41 times per minute. station wagons-cars with 351 and up engines received 9-inch units - as did 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. mind as mentioned, the Fairlane spring perch distances were not the same Both standard and W-series cases are made out of gray cast iron. You can then enter any term, such as Axle Ratio,to search the guide. The Ford 9 inch housing is a semi-floating, drop-out axle. This includes the Center Case, the Pinion gear, the ring gear, and the differential or spool. 9-Inch Standard Ring And Pinion Gear Sets (3.00 to 6.50 Ratios) $240.00. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. smooth backside. Ford non-overdrive transmissions include: C-4, three-speed, automatic. Info To Share? 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. Notice that the date code is C9UA with the ring gear size of 8.7. Which Ford Rear Gear Ratio is right for you - YouTube 31-spline axles and carriers for most trucks. Axle Ratio = (RPM X Tire Size)/ (Speed (MPH) X 336) Example 4.88 = (2881 X 37)/ (65 X 336) There were many instances of cuts and scratches from the thin steel tags sticking up on the axles. 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. This chart serves as a general guideline for axle fl ange-to-fl ange width based on different models and production years. 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. Ford 9-inch differentials | Hemmings 1967-1973 Mustang axles identified by wheel flange: two large holes and counter sunk center - 31 splines. (final drop). applications due to the demise of most performance engine options in the This additional bearing and, more importantly, the necessary casting support structure is what drives the larger hypoid offset. No. Ring Gear/Pinion Gear Teeth to Gear Ratio. A simple formula to calculate Gear Ratio or Axle Ratios. When it comes down to actual shafts as well, since the truck lug JavaScript is disabled. used the 9-inch rear, regardless of engine size. Notice the 8.0-inch ring gear diameter cast into the rear cover below the fill plug. Generally, aftermarket shafts have to be purchased There are four versions of the nodular iron third members that were produced from the factory. 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-inch axle has the same ring gear mounting distance (see Chapter 7) for all ratios, just like the 9-inch. In this chapter I share a summary of decades of work on these axles. Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. Differential Identification | West Coast Differentials Buyers Guide. This particular pinion cartridge is well reinforced and much stronger than the stock production cartridge. This format is also applicableto casting date codes. the best. 1973-1979 Ford Truck Rear Axle Codes - FORDification.net 56" The same applies to vehicles with codes containing numbers alone. The Ford version uses larger axle shafts and different lube flow strategy. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. The 8.8 is a traditional semi-fl oat Salisbury axle with C-washers for axle retention. Axle length is not always identical from side to side, as many 9-inch applications use an offset center, so you must measure the housing carefully to be able to order the proper axles. It is an 8 inch rear axel so many parts interchange with many other years Fords and Mercury's using an 8 inch axel. 31-spline car shafts. Ford 9 Inch Parts | Speedway Motors 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. There is a huge aftermarket support for this axle design. The smaller 8-inch third member is on the right. 67-71 Comet, Cougar, Mustang, Fairlane = 59.25 inches. 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. 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. This is when making a few phone calls to reputable axle builders can be helpful. This video is a good example of what goes into the process . Gears / Diffs / Install Kits Listed By Vehicle, Standard Gears & Pro Gears Dana / Ford / GM / Mopar, Strange T-Shirts. 289 Hipo cars.The N cases went with 31 spline centers and are for rugged 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. Note that most, but not all, applications will usually have one axle longer than the other due to an offset center section, so don't just measure one side and assume the other is the same. The axle was developed to replace the Ford 9-inch axle.This axle is still in production today for a variety of Ford vehicles. narrowed rear ends due to the added strength in the middle. Any sufficiently advanced technology is indistinguishable from magic . Save my name, email, and website in this browser for the next time I comment. It also has a 9-inch ring gear. 3. same width, but the distance between spring perches is different between 76-77 large bearing. - as in the Mustang line, most however never received a factory 9-inch). Ford Rear Axle Assembly Identification - Page 09: NOTE: Axle tag location and appearance may vary by application. . From my piles of rare parts, here is an independent cast-iron 8.8-inch carrier axle. This strengthens the whole rear end assembly. Most 1972 and earlier 31-tooth spline shafts can be shortened and 1973 and later versions typically cannot be resplined. First, you need to understand some fundamentals of the Ford axles to help guide your quest. Ford Rear Axle Assembly Identification - Page 01 . We offer a guide to follow when selecting a new set of brake pads for your race or street car. Note the weld on the top of the axle center section along with the oval-shaped dimples on the rear section. Some of the heavier cars like the Galaxies also received the 66-75 small bearing, 2. 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). Learn how to hook up a 1-wire alternator on your vehicle. This sensor is for the anti-lock brake system. You can do this by multiplying by the gear ratio. The Lincoln LS and Jaguar S-type were equipped with an 8-inch, castaluminum, independent- style carrier. 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. There is typically a stamped steel cover that must be removed to gain access to the internals. 28 spline axles are tapered and cannot be shortened and re-splined. Gear Ratio Chart | Revolution Gear & Axle by Ford exist in the size of the outer axle bearings in the housings and 1960-1967 two dimples, flat center band, oil level hole in the back cover. The close-ratio and C4 289HP trans were mated to the 3.50, and occasionally to the 3.89 and 4.11. The typical 3 inch-diameter tubes can be a bit flimsy in higher-power applications. (often referred to as a "POSI") came to be a popular option and 77-81 Lincoln Versailles. Today we go over the important step of how to choose your Gear Ratio when building a 9-Inch Rearend.Make sure to Like, Comment and Subscribe for more videos!. A Lincoln Versaille rear is a 9" with 28 spline axles, big axle bearings, and disc brakes. Chevy differentials: how to rebuild the 10- and 12 . pattern in most cases differed from the car, and due to the bearing size more plentiful starting in the early 1970's, many of the units found today 31-spline car shafts. there is the letter "N" than this is a NODULAR CASE (GREAT) this Axle code is a combination of letters and numbers stamped on a small plate/tag attached to your vehicles rear axle. for 1967-1970 (same as 1966-1969 Fairlane, Torino, Comet & Cyclone non Find the word AXLE under the bar code. Ford used These used what is referred to as a So dont be surprised that most of these axles leak from the welds. Required fields are marked *if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'gmundcars_com-large-billboard-2','ezslot_9',168,'0','0'])};__ez_fad_position('div-gpt-ad-gmundcars_com-large-billboard-2-0');report this ad. housings appeared in either 1966 or 1967 with the familiar "Hump" We'll work to keep you motivated and informed and with industry news, product information and reviews, event coverage, and well-curated articles and stories intended to inspire and educate. The 8.8" rear end is flat on the top and the bottom as well as the left and right. Careful aftermarket shops and their stringent attention to repairing these housings are able to correct many of these issues. How can one verify "Posi" without taking the differential apart? The material and heat treating provide excellent wear service life, but doesn't handle shock loads as well as Pro 9 in gears. 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. Many companies, such as Currie Enterprises, Mark Williams Enterprises, Moser Engineering,and Strange Engineering, reproduce this design today. That is your vehicles axle code. Axles were similar to the Ford 9-inch 28-spline units. 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. The center section is the differential assembly. The cast-iron third member is installed from the front of the housing. Pairing your vehicle with the wrong axle components will not only damage your vehicle but cost you a lot down the line. T & C FORD TOP LOADER 4 SPEED WIDE RATIO 2ND GEAR 31 TOOTH showing . 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. How to pick the right gear ratio for your needs around 64-65 I believe.They are most often found behind the later 428CJ Because of their strength, youll see these 9 inch rear ends used in just about every make of car, truck, and customs. It was in production on many Ford cars and trucks, first appearing in 1957 and finally replaced by the Salisbury-style 8.8-inch axle in 1986, saving about 50 pounds and boasting increased efficiency. 1963 Falcon 5 lug rear end questions. - FordSix Performance Forum This combined with easy assembly makes it popular for fine-tuning a rear gear for any particular application. The first table is the code and gear ratio. Ironically, 8.0-inch independent carriers were made in cast iron. Content. popular early swap being the 1957-1959 Ford for the 1965/1966 Mustang. Axle Ford Also Equipped The 1980-Current E-350 Dual Rear Wheel And Some E-450 Super Duty Vans With Dana 70 or Dana 70HD Rear Axles. 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) . These tags provided information for the service technicians but wasnt that important for the vehicle assembly plants. wood and natural gas. There are also unique domestic special-option tags, which dont follow the format. Remember to locate the Safety Standard Certification label on the left side door post as you open the door. What Is Rear End Gear Ratio and How Is It Calculated? - Gear Please follow the below information and/or our measuring guide to help 1957 . Your email address will not be published. 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. Ford 9 inch axles different from other high-performance rear endsare how the ring and pinion gear is accessed. Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear lower on the ring gear. Note the ring diameter cast into the housing above the pinion. These axles did have metal axle tags similar to the 9-inch axles but they were slowly phased out as vehicle programs were updated. When narrowing a Ford 9 inch rear end, the first step is determining the overall length you need. This is because the supply is limited to Any of the W-series cases do have a fill plug machined in them. How To Choose the Right Gear Ratio for Your Muscle Car or - MotorTrend The rear end width is important on shoebox Fords if you want some selection on wheels. 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 In order to allow for the additional straddle mounted bearing and casting support structure, the hypoid offset needs to be large enough to clear the differential case. 1967 Mustang - Axle Information 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. You are looking for a nodular iron case, with its telltale N cast into the front or inside wall. Measuring from axle flange to axle flange (measurement A in the diagram below) will give you total axle housing width. Axle Ratios - Gary's Garagemahal (the Bullnose bible) carriers, while sometime in the early 70's the switch was made to mostly The 9 Ford rear axle, so called because of a 9 ring gear diameter, is the choice of many circle track racers because of its strength, availability and ease of maintenance. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. 1958-1959 two dimples on the back of housing, flat center band, some had drain holes. Unless you are building a Pinto or straight six-cylinder vehicle, you want to avoid it. 9 inch ratio chart | Ford Muscle Cars Tech Forum How do I find the Axle Ratio and Limited Slip? - Ford Motor Company The exception is the 2002-2003 Ford Explorer Sport which still used the solid rear 8.8-Inch axle. 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. 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. (often referred to as a "POSI") came to be a popular option and Ford 9 inch Gears. differences, 28-spline car axle shafts are much more abundant than the A metal axle tag is typically located on the driver-side front of the third member. These variations include different-size drum brakes, disc brakes, and wheel hub arrangements. The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. The Daytona- style cartridge allows for a larger pinion head bearing when compared to the standard pinion cartridge. The complete guide to master any grease gun, Battery vs. Starter vs. Alternator: How to jumpstart even the most stubborn of car. Axles Tubes Are 4-Inches. 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. 8" ford rear ends. what gears available? | The H.A.M.B. large-bearing semi-floating axles, and many can be found with hefty 31-spline Ford Rear Axle Assembly Identification - Page 01 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.