How To Recognize 9-Inch Housing Any sufficiently advanced technology is indistinguishable from magic . Dont be surprised if the tag you have does not exactly match this. A Lincoln Versaille rear is a 9" with 28 spline axles, big axle bearings, and disc brakes. N-case. But the 9" is better in a couple respects: It's much lighter than a Dana 60. For reference, this section from the Ford MPC is posted . widths I keep in mind for Mustangs are the following: 52" in the backside middle and stronger tubes. CASE" 2. popular early swap being the 1957-1959 Ford for the 1965/1966 Mustang. 1973 and later cars have a 55 bolt pattern, and the axles cannot be shortened. The "rough" 289 Hipo cars.The N cases went with 31 spline centers and are for rugged The middle number is the ring gear diameter in inches, typically an 8 or 9. 31-spline carriers and axle shafts. It is an 8 inch rear axel so many parts interchange with many other years Fords and Mercury's using an 8 inch axel. 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 The bottom line begins with the ratio being the first set of numbers. There are 4 different sets of rear axles that would have come stock in 66-77 Broncos. 56" A strong 9" with a nodular diff and 31 spline axles is fairly comparable in strength to a stock Dana 60 rear end. The There is a huge aftermarket support for this axle design. 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. common carrier housing found is the C7AW-E. The WJ Handy Dad recommends safe practices when working on vehicles/homes and or with tools seen or implied in this video. There are 8.5-inch gears installed in these housings for lowerpower vehicle applications. This is a major advantage compared to other rear axle systems because disassembly is faster and more convenient. In this chapter I share a summary of decades of work on these axles. 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. When it comes down to actual shafts as well, since the truck lug Ford Aerostar: The 8.8-Inch axle . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Here is a picture of the milling machine cutting new spline teeth after the axle has been cut to length. If you liked this article you will LOVE the full book. These third members are the strongest of the production cases and the most desired. Ford differential tags are very . 1-wire alternators are perfect for engine swaps or just keeping things simple for your project. dimples. You can find the axle code on the Safety Standard Certification label information. Its called a 9 inch because the ring gear measures 9 inches. actual car posi units, which were primarily 28-spline carriers, can be Restoration matching issues will be avoided since the right optioned components will be used to make the restoration. Both axles share a common design and are often referred to as banjo style or third-member style. 66-75 small bearing, 2. 8.75, 9.25, Ford 9 inch, and GM's 8.25 inch . Mustangs to the housing, the small bearing housings use 9/16" socket size nuts Gear ratios can be quickly changed by removing the axles and driveshaft, unbolting the . replaced, and that is why it remained in use for so long. If your vehicle has a Limited Slip Differential, it will be noted as Limited Slip. station wagons-cars with 351 and up engines received 9-inch units - as did GM Chevy S10 82-04 Complete 9" Rear End Package. 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. But 10.168 / 4.70 (to determine the equivalent rear-gear ratio) equals 2.16:1, which is not realistic. Ford 9 inch axles different from other high-performance rear endsare how the ring and pinion gear is accessed. The last set of digits on the top row on the right side is the date code. 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". You Like the H in our case shows a car with a limited-slip differential. Ford 9.5 PRO GEAR* *PRO GEAR RATIO PART NO. It was required to repair a leaking weld. You are looking for a nodular iron case, with its telltale N cast into the front or inside wall. 74-75 medium duty large bearing, and. "N Case" was no longer needed for passenger car/truck Note: Rear axle ratios are available for 2008 and newer models. C-6, three-speed, automatic. Thanks. by Ford exist in the size of the outer axle bearings in the housings and Select the Towing Guide for your vehicle's model year. The 9-inch housing's center section will not allow the socket to clear, and . inch diameter all the way to the backing plate, coil housings have upper It is as easy to cut down as any other 8 or 9 inch Ford axel. 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. Generally most cars received the small axle bearings and 28-spline axle * Pro Gears are specifically designed for drag race only. An assortment of Ford 9-inch axle stampings is welded together to create the housing. When measuring from the top left bolt to the bottom left bolt, the 8.8" rear end will measure 11" from bolt to bolt. (It was later used for pick-ups and Broncos.) It was not the only axle used, but was by far one of Some even consider these axles to be bulletproof. This is a relatively common issue on these housings. "Pro" gears are designed specifically for drag racing. 6. You Here is a quick visual summary: The 1957 housings do not have dimples on them and have an oil drain plug. The ranger truck works good with a 9-inch from a Differential Gear Ratio Calculator. tubes with flat tops, 1969-1977 Galaxies (coils), Lincolns (coils), and late pickups (leaf)- 3.25 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. is by far the most abundant case being used in both full size Ford cars How do I find the Axle Ratio and Limited Slip? Applications: Ford Used The Dana 70 And Dana 70HD Axles In F-350 Trucks Up To 1985.5. with 3/8" fine thread, while the larger bearing use 11/16" Cost and complexity are two. This is because the supply is limited to 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 other identification information, 9, as observed from the chart, indicates a 3.55 gear ratio of the Ford F-150. Theres an easy way to tell an 8-inch apart from a 9-inch. 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. There are several reasons for this. This bearing is one of the reasons that the 9-inch has the reputation for being bulletproof. Keep in From my piles of rare parts, here is an independent cast-iron 8.8-inch carrier axle. The Lincoln LS and Jaguar S-type were equipped with an 8-inch, castaluminum, independent- style carrier. So rare Ford dropped it after 66, when they also dropped the 7" Equalock. The ring gear speed sensor is shown in the upper right-hand portion of the photograph. Along with the many different brake and wheel end varieties, many different styles of axle shaft ends were manufactured. smooth backside. * Pro Gears are specifically designed for drag race only. determine which axle housing many cars and trucks received. The rear-end housing has a vast amount of ford 9-inch gear ratios available. This is an easy way to identify the third members, so youre sure to buy the correct axle. medianet_crid = "364974658"; . 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.. The original applications are as follows: 1. Any of the W-series cases do have a fill plug machined in them. Front Axle Codes While the parts catalog says "The third digit of the axle code identifies the ratio and/or capacity of the front axle", that is not true.As seen below, there are only 4 codes (2 - 5) and they do not define the axle ratio nor capacity.In fact, to find the front axle ratio you need the codes off the axle itself, as shown here: Home / Performance Front & Rearends / Parts Department / Ring & Pinion Sets / 9-Inch Ford. The 28-tooth axle shafts are typically tapered and cannot be shortened. Original gear ratios range between 2.79:1 and 5.43:1, and aftermarket replacement gears are available for many ratios as well. It was then replaced by the Ford 8.8 inch rear axle. The narrowest production 9-inch axle is 56.375 inches. Discount is automatically applied. 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. People have been climbing around scrap yards for years to find the best examples of the 9-inch axle. It is underneath one of the nuts that holds the third member in place. them. The Ford 8.8-inch axle has a cast center section and the internal components are installed from the rear. For instance, if both the engine and transmission deliver up to 100 ft./lbs. Some tags reference the week of the month instead of the exact day and just use a letter (A to E) for first through the fifth week of the month. most abundant. Get any 3 for $25 plus shipping. Note the weld on the top of the axle center section along with the oval-shaped dimples on the rear section. much more difficult to locate. So dont be surprised that most of these axles leak from the welds. 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. Many aftermarket companies produce 9 Ford equivalent rear axles for the drag racing and hot rod industry. There may be other labels attached to that pillar so pay attention to one that looks similar to the one below. 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. for 1967-1970 (same as 1966-1969 Fairlane, Torino, Comet & Cyclone non We stand behind our products with some of the smartest technicians in the industry. Here is an example of a weld repair on a factory original housing. carriers both, as well as with the spline count on the axle shafts. You will need to get your hands on your manufacturers axle code chart for this part. Ford personnel and/or dealership personnel cannot modify or remove reviews. This allows quick gear ratio changes to accommodate different tracks or updates to your vehicles horsepower and torque ratings. The date code is stamped on the tag. These were used sporadically until about 1969. You bring the gumption. Install Kits and Gears Sets Listed By Rear End. Some of the heavier cars like the Galaxies also received the Careful aftermarket shops and their stringent attention to repairing these housings are able to correct many of these issues. 8. 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. It is still used in NASCAR racing as well. With the chart in hand, locate your vehicles axle code on the axle code column. We're This chart applies to all Ford non-overdirve transmissions, manual and automatic. is by far the most abundant case being used in both full size Ford cars Because of the long production history of this axle, many variants are available. Learn more. The bar code is present on this unit as well, although later axles just carry the bar code and the metal tag is no longer required. axleshafts. Buyers Guide. The Ford version uses larger axle shafts and different lube flow strategy. The WAR, WAA, and WAB cases have the same ribbing as the N case, but are missing the ever important N feature. The and Fairlane axle housings are often grouped together because they are the The desirable N-style, nodular-iron gear cases are available in four different versions. and trucks throughout the 1970s. A metal axle tag is typically located on the driver-side front of the third member. And you can find the axle code charts on the internet from your manufacturer. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. 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. Standard Ford 9 inch gear sets are primarily used in street applications. 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. many half ton trucks continued to utilize the 9-inch (both 2 wheel & 4 WJ Handy Dad assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear lower on the ring gear. The third reason was basic health and safety concerns for the assembly technicians and other employees who handled the axles in the manufacturing and assembly plants. The 7.5" rear end is also flat on top and bottom. station wagons-cars with 351 and up engines received 9-inch units - as did The rear-end housing has a vast amount of ford 9-inch gear ratios available. determine which axle housing many cars and trucks received. same width, but the distance between spring perches is different between Would very much apreciate it if someone would post it again. The N cases had two vertical ribs, three horizontal ribs, and a machined-in fill plug. Because of their strength, youll see these 9 inch rear ends used in just about every make of car, truck, and customs. small bearing housing can be differentiated from a large bearing housing 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. The code, 4L11, tells us that it is a 4.11:1 ratio with a limited-slip or Traction-Lok differential. The Maverick 8" or Ranger 7.5 and 8.8 are good options. 31-spline carriers and "Traction Loc" style posi unit. Also note there isn't a cover on the rear like most axles. Mustangs and Fairlanes. 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. Dec 1, 2011. This case looked like a nodular unit from the front regarding rib structure but did not have the N on it. - as in the Mustang line, most however never received a factory 9-inch). Any Ford 9" carrier will fit, as long as it has a fill plug on the side. 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. Drag Racing 101 ~ Everything You Need to Know! shafts. All of the 8-inch case nuts can be accessed with a socket. 76-77 large bearing. The smaller 8-inch just cannot handle the abuse as its bigger brother can. in cars and trucks. Richmond Tech Support. The same applies to vehicles with codes containing numbers alone. The Fora platform includes forum software by XenForo. If an L is included, it was equipped with a limited-slip differential or Traction- Lok. From the arrow, you can see the axle code is H9. The rear-end housing has a vast amount of ford 9-inch gear ratios available. Both standard and W-series cases are made out of gray cast iron. Talk to the experts. The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. if one wants to use a 31-spline truck carrier in a car. Ford cars and trucks from 1968 on have an axle code on the Certification Plate, information on this plate can be used to determine if you vehicle is factory equipped with a limited slip positraction rear end - differential. 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. There are also unique domestic special-option tags, which dont follow the format. I reference these axles based on the ring gear nominal outside diameter in inches. 9-inch (cars) have a 5-on-5 bolt circle and the axles cannot be shortened. found in the trucks up to around 1982. 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!. the best. When it comes down to actual shafts as well, since the truck lug Enter the required Overall Width, Pinion Offset (location), Brake Space and Drum/Rotor thickness to find axle length and housing width. and 429CJ cars.From what I have seen don't expect to find them in 390 or diameter bolt circle, 1967-1973 Torinos, Rancheros, Fairlanes 59.25 inches or Most of socket size and 7/16" fine thread. medianet_height = "250"; Mustangs This is because the supply is limited to Where A=the first number (static reduction), Bi=Gear diameter, Bf=Ring Gear diameter, Cf= (Crown Wheel dia.) socket size and 7/16" fine thread. It allows for the pinion side Center Section to be removed. is the strongest factory case made BY FORD!!! I'm not responsible for incorrect information, Width: all measurements are flange to flange, Ford Rear Axle Assembly Identification - Page 01 - FORDification.com. First, the pinion shaft housing is removed from the front of the housing by removing five bolts. The magnesium addition causes the grain structure to change from flakes to nodules and thus the name nodular iron. These variations include different-size drum brakes, disc brakes, and wheel hub arrangements. control arm mount. if not I have other 9" info archived I can post. 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. The leaking weld area is then ground down and a MIG or TIG welder is used for the repair. This will ensure that the correct replacement parts are purchased or salvaged from a junkyard to be used in the vehicle. T & C FORD TOP LOADER 4 SPEED WIDE RATIO 2ND GEAR 31 TOOTH showing . The Ford 9 inch rear end is one of the most popular axles in automotive history. But it will also use more fuel in all situations because the engine's rpm will be higher. 800-646-6718. This is 2.25 inches for the Ford 9-inch and 1.5 inches for the 8.8-inch axle. You can then enter any term, such as Axle Ratio,to search the guide. Note: Rear axle ratios are available for 2008 and newer models. 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. This includes the Center Case, the Pinion gear, the ring gear, and the differential or spool. CLICK HERE to see a complete listing of front axle codes). The larger offset is better for strength and noise but worse for sliding and efficiency. - Rod Stroke Ratio - Stroke Size Rear Gear Requirements - Rear End Gear Ratio Needed - Speed from RPM, Rear & Trans. Anyone know? if so is this what you are looking for. there is the letter "N" than this is a NODULAR CASE (GREAT) this Ford Differential Axle Codes. For example, Ford says the 2018 F-350 Super Duty 4x2 regular cab pickup equipped with the 6.2-liter . The case Only the N-series cases are made out of the stronger, more desirable, nodular iron. Spring perches must be cut and re-welded in order also received the larger axle bearings housings. Ford 8 Ford 9: CLICK FOR MORE INFO. This larger offset (hypoid distance) between ring-gear . The ring and pinion are then accessed, also from the front, by removing another 10 bolts. This strengthens the whole rear end assembly. of course most desirable is the N case, first used on the 427 Galaxies The original carrier is normally equipped with a CV joint flange, which can be replaced with a U . Calculators. allow larger ring gear to fit. 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. Filed Under: Ford Tech Tips, Rebuild Ford Differentials, The Best Ford Tech Articles, 2023 DiY Ford. 77-81 Lincoln Versailles. 1967-1973 Mustang axles identified by wheel flange: two large holes and counter sunk center - 31 splines. The Daytona- style cartridge allows for a larger pinion head bearing when compared to the standard pinion cartridge. The Ford 9 inch rear end also has the widest variety of ratios on the market, Particularly in the 3.0:1 to 5.0:1 range. 66-71 Fairlanes, Torinos, Montegos, Comets, and other Ford intermediates with big blocks. Axles Tubes Are 4-Inches. 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. applications due to the demise of most performance engine options in the The same applies to vehicles with codes containing numbers alone. Using the correct part is imperative to engine longevity and proper drivetrain assembly. With its 2.250-inch offset, the Ford 9 inch gears hypoid distance is greater than popular competitors, most of which are at 1.5 inches or even less. Note the ring diameter cast into the housing above the pinion.
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