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. 56" 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. This is not a nodular unit. medianet_height = "250"; So dont be surprised that most of these axles leak from the welds. While we do offer cut-to-fit axles, you still need to ensure you have the proper measurements to be within the cut-to-fit area of the axle's splines. the few cars and early Broncos (and some early trucks) which received N-case. Refer to the Axle Ratio table to determine your rear axle ratio and Limited Slip. inch diameter all the way to the backing plate, coil housings have upper The material and heat treating provide excellent wear service life, but doesn't handle shock loads as well as Pro 9 in gears. 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 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. The Ford 8.8-inch axle has the same ring gear mounting distance (see Chapter 7) for all ratios, just like the 9-inch. The ring and pinion are then accessed, also from the front, by removing another 10 bolts. common carrier housing found is the C7AW-E. Measuring for your 9-inch axles requires a few basic measurements to be taken. Variations Builder V8 Billys 1966 Ford Fairlane Twin Turbo 427 RestoMod was built for Street and Strip. 100 x 4.12. Ray. There are 4 different sets of rear axles that would have come stock in 66-77 Broncos. The repair process requires the axle to be disassembled and thoroughly cleaned. This is because the supply is limited to some 302 4V cars with optional gear ratios). The 7.5 should be plenty adequate for the application you describe, but an 8.8 is best. for the swap to be performed. The center section is the differential assembly. and trucks throughout the 1970s. many half ton trucks continued to utilize the 9-inch (both 2 wheel & 4 There are 8.5-inch gears installed in these housings for lowerpower vehicle applications. 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. There is a machined roller bearing race on the pinion head portion that points at the differential opposite thetapered bearing races. 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. There is a very fundamental difference between Fords 8.8- and 9-inch axles. Also notice the part number and metal axle tag. (narrowest 9-inch housing), 1966-1977 Bronco 58 inches but has 5-on-5 1/2 inch The fundamental difference between these axles is how the gears are supported and which end of the axle housing (front or back) that they are assembled from. widths I keep in mind for Mustangs are the following: 52" For example: It's important to know the friction quality and pad size before selecting a new set of disc brake pads. I have spent countless hours over the years collecting, reading, and studying old shop manuals, supplier reference documents, SAE papers, and even vehicle manufacturer reports and notes. First locate your current gear ratio and tire diameter and then find your approximate RPM at 65 MPH, then reference your new tire diameter with your desired RPM to find the new gear ratio needed. JavaScript is disabled. 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 If you liked this article you will LOVE the full book. Info To Share? These tags were not that informativeon the early units, so from 1957 to 1962 the tag just referenced axle ratio. 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. Hot rodders and drag racers use 9 Ford rear-ends and their aftermarket descendants in just about everything not just Ford cars and trucks. Let's see, I have had 2.79. Note the two lower bolts at 6 and 7 oclock have straight access with a socket. . The axle housings themselves had many different variations over time as well. This strengthens the whole rear end assembly. 31-spline carriers and "Traction Loc" style posi unit. How do I find the Axle Ratio and Limited Slip? MaritzCX moderates public reviews to ensure they contain content that meet Review guidelines, such as: No Profanity or inappropriate defamatory remarks, No Personal Identifying information (e.g., customer phone number or email), No Competitor references (e.g., another brand or dealership), Dangerous behavior (e.g. 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. This is a major advantage compared to other rear axle systems because disassembly is faster and more convenient. (final drop). I reference these axles based on the ring gear nominal outside diameter in inches. We're housings appeared in either 1966 or 1967 with the familiar "Hump" Here is an example of a weld repair on a factory original housing. I'm not responsible for incorrect information, Width: all measurements are flange to flange, Ford Rear Axle Assembly Identification - Page 01 - FORDification.com. Ford 9 inch Gears. The WAR, WAA, and WAB cases have the same ribbing as the N case, but are missing the ever important N feature. Nine Inch Rear Axle. Learn more. You will need to look at the Ford axle code chart to replace your Ford rear-end axle parts. This is a sampling of some of them. The ring gear speed sensor is shown in the upper right-hand portion of the photograph. N-case. found in the trucks up to around 1982. The 9-inch housing's center section will not allow the socket to clear, and . Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. This is because the supply is limited to actual car posi units, which were primarily 28-spline carriers, can be Of the four versions of the N case, three have an actual N cast into it right above the pinion cartridge. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. much more difficult to locate. The narrowest production 9-inch axle is 56.375 inches. replaced, and that is why it remained in use for so long. It was not the only axle used, but was by far one 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. The following chart of Tire sizes and axle gear ratios are meant to give a general idea of the relationship between the differential gear ratio and the tire size and what effect the ratio has on power output and fuel economy. Our editors pick the products & services we write about. Where A=the first number (static reduction), Bi=Gear diameter, Bf=Ring Gear diameter, Cf= (Crown Wheel dia.) 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. but the link i was refering to listed codes by year and model. 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. This is a typical axle tag that has been removed from the third member. These shafts had a longer brake spacing offset and a unique brake drum register diameter of 2.870 inches, which was uncommon for the time. The smaller 8-inch third member is on the right. The same applies to the rear differential. 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. Finding the location of this certification plate is easy. Warranty Period: 1 Year or 50,000 Miles: Part #: MGK-300 : Ring Gear Diameter: 8.5 Front (Inch) 9 Rear (Inch) Ring Gear Material: 8620 Steel: Differential . The 28-tooth axle shafts are typically tapered and cannot be shortened. Along with the many different brake and wheel end varieties, many different styles of axle shaft ends were manufactured. 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. 4. 4. for the swap to be performed. If you are building a 9-inch Ford rear end for your project know you have plenty of options in gear ratios, axles, bearings, brake kits, and much more! if not I have other 9" info archived I can post. FMX, three-speed, automatic. The close-ratio and C4 289HP trans were mated to the 3.50, and occasionally to the 3.89 and 4.11. threatening to harm employees or others), Lack of adequate text (e.g., symbols, emojis and random letters), Reviews on the product and not the customers Sales or Service experience. The Ford version uses larger axle shafts and different lube flow strategy. 1957 no dimples, flat center band up the center of the rear cover, bottom drain plug. GM B-Body Complete 9" Rear End Packages. This is a relatively common issue on these housings. The most Besides the styling of the Ford Edsel, even the axle shafts were very unusual. Standard Ford 9 inch gear sets are primarily used in street applications. Customers are invited to participate in a survey administered by MaritzCX, an independent, third-party supplier. can tell this is a 9-inch from the removable carrier on the front. Many aftermarket companies produce 9 Ford equivalent rear axles for the drag racing and hot rod industry. You are looking for a nodular iron case, with its telltale N cast into the front or inside wall. No Brake Fluid Coming Out When Bleeding: The Causes and How to Fix, 15 PENSKE Truck Warning Lights: Video Included, Manufacture date of the particular car model (DATE). Another bonus is that the axleshafts are of equal length, so youll Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. Housing end bolt patterns can be confirmed on the bottom of the axle order form. A copy of the Ford Axle Code Chart is linked below in this article. station wagons-cars with 351 and up engines received 9-inch units - as did Both 8- and 9-inch axle housings are made from a series of stampings that are fixtured and welded together. The later If the case has two verticle RIBS ,from top to For a better experience, please enable JavaScript in your browser before proceeding. Careful aftermarket shops and their stringent attention to repairing these housings are able to correct many of these issues. small bearing housing can be differentiated from a large bearing housing Ironically, 8.0-inch independent carriers were made in cast iron. in the backside middle and stronger tubes. Some axle shafts can be shortened and a new spline machined in place. applications due to the demise of most performance engine options in the People have been climbing around scrap yards for years to find the best examples of the 9-inch axle. It is the one most commonly How can one verify "Posi" without taking the differential apart? 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 This format is also applicableto casting date codes. Start by opening the left drivers front door. 7.5 inch, 8.5 inch, 10.5 inch. There may be other labels attached to that pillar so pay attention to one that looks similar to the one below. How To Recognize 9-Inch Housing by the size of the nuts and thread used to retain the brake backing plates "Pro" gears are designed specifically for drag racing. In 1963, Ford includedmore information. 1967-1973 Mustang/Cougar - light duty, thinnest housing material, small axle Also note there isn't a cover on the rear like most axles. The Ford 8.8-inch axle has a cast center section and the internal components are installed from the rear. thanks. nickel content and better casting than the earlier single ribbed cases it narrowed rear ends due to the added strength in the middle. The typical 3 inch-diameter tubes can be a bit flimsy in higher-power applications. mind as mentioned, the Fairlane spring perch distances were not the same This is when making a few phone calls to reputable axle builders can be helpful. For example: The tag will say: 350 for 3.50:1 ring and pinion gear ratio. Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. Well show you what to look for in this buyers guide. Ford used Here is an example of such a unit. actual car posi units, which were primarily 28-spline carriers, can be It has enjoyed a long production history with many variants. inches It has been said that it has a higher The Independent Rear Suspension (IRS) used in '99-'04 Cobras and the current Mustang use almost the same differential as the standard 8.8. Ford rear ends, or differentials, were manufactured by either the Dana Corporation or Ford. around 64-65 I believe.They are most often found behind the later 428CJ 1973-1979 Ford Truck Rear Axle Codes. This not easily accomplished with integral carrier axles, like the GM 10- and 12-bolt. Read more: CV Axle Boot: Overview, Signs, And Replacement. This strengthens the whole rear end assembly. Most of 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. 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. housings. if so is this what you are looking for. 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. Once you have identified the label, locate the word AXLE under the bar code section. The 1958s and 1959s have two dimples on either side of the housing and some have drain plugs. 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. (The third digit of the axle code identifies the ratio and/or capacity of the front axle, if applicable. Dont be surprised if the tag you have does not exactly match this. The 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. housings also evolved over the years: truck housings received even beefier center carrier housings and tubes, 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 . by the size of the nuts and thread used to retain the brake backing plates These axles did have metal axle tags similar to the 9-inch axles but they were slowly phased out as vehicle programs were updated. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. Written by Joe Palazzolo and Republished with Permission of CarTech Inc. Since 2011, V6 and V8 Mustangs have used Ford's 8.8" rear end, but before that many used a 7.5" rear. There is a ton of aftermarket support for this axle (see Chapters 3 and 4 for more details). medianet_width = "300"; Hoonigan Founder and Pro Rally Driver Ken Block Dead at 55, Worlds MOST Unusual Cars Ever Made, Found In One Warehouse, Lower the Bar ~ Perfectionism is Ruining the Automotive Hobby, 1971 GMC COE Fire Truck to Ramp Truck Car Hauler Build, Roadkills Best (and Worst) Drag Strip Tests, How To Choose the Correct Drag Racing Tire, 25 Tools and Gift Ideas Under $15 From Harbor Freight You Need, The Myths And Realities Of Carburetor Sizing, The Inaugural No Name Nationals Drag Race & Burnout Contest Coverage, Lawn Mower Racing ~ The Worlds CHEAPEST Motorsport, Quick and Easy DIY Headliner for Less Than $20, 1928 Ford Model A Coupe Goes From Yard Art To Driver, How To Turn Railroad Track into a DIY Homemade Anvil, New Docu-Series from Rat Rod Magazine ~ American Rust, Finishing a Late Friends Handmade 1956 Baby Buick Special Mini Car, Best 3-Ton Floor Jack? Differentials, Axles/Drivelines, Book, Using GoJak Wheel Dollies to Easily Move Your Vehicle, Brake Pad Identification and Friction Surface Options Explained, Adapting Tremec's Popular T5 5-speed Manual to Ford's Flathead V8 Engine, Ford And Chevy Spindle Options For Solid Axle Hot Rods, Small Block and Big Block Chevy Engine Flexplate Guide. 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. And you can find the axle code charts on the internet from your manufacturer. Rhodes Race Cars Unwelded Fabricated Rear End Housing Ford 9 in. them. (often referred to as a "POSI") came to be a popular option and This chart references the connection between the month codes and the actual month. Generally, aftermarket shafts have to be purchased 70's. This roadster sounds amazing, goes hard and turns heads wherever it goes. station wagons-cars with 351 and up engines received 9-inch units - as did 70's. Spring perches must be cut and re-welded in order middle of case it is a good IRON type IF in the very center of this case
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