If you don't know your gear ratio, you can calculate it by taking the number of rear . The first two digits of the axle code identify the ratio and capacity of the rear axle. Your email address will not be published. type, 28 and 31 splines, Ranchero/Torino - heavy duty thick wall housing, 3.25 inch diameter axle There is a ton of aftermarket support for this axle (see Chapters 3 and 4 for more details). It is common to find a 9-inch in a old Falcon or and Fairlane axle housings are often grouped together because they are the 31-spline axles and carriers for most trucks. Standard Ford 9 inch gear sets are primarily used in street applications. "N The same applies to the rear differential. most abundant. 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. Are reviews modified or monitored before being published? 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. Our expert customer support technicians are available Monday through Friday from 7:00 a.m. until 7:00 p.m., CST. much more difficult to locate. Dont be surprised if the tag you have does not exactly match this. for 1965-1966 (the same width as 1964-1965 Falcons and 1962-1965 Fairlanes Variations A metal axle tag is typically located on the driver-side front of the third member. used the 9-inch rear, regardless of engine size. The bottom line begins with the ratio being the first set of numbers. is by far the most abundant case being used in both full size Ford cars It was then replaced by the Ford 8.8 inch rear axle. Part Category: Disc Brake Rotor and Hub Assembly.1999 Ford Ranger Rear Axle Assembly 7.5 RING GEAR, 9 BRAKES, 4.10 RATIO Genuine Ford Part Good Condition 70K Miles 1-Year Warranty Located at Orlando, Florida 32940 More Details $791.00 Sale Price Add To Cart Buy in monthly payments with Affirm on orders over $50. 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. The Ford 8.8-inch axle has the same ring gear mounting distance (see Chapter 7) for all ratios, just like the 9-inch. housings also evolved over the years: . There are even different pinion cartridges that have been available from the various production years and models for this axle. There are three versions with external Ns cast in; note the more curved style on the top right. The "rough" Axle Size/Strength Chart; Explained Videos; Tech Articles; 9-Inch Ford. For example, Ford says the 2018 F-350 Super Duty 4x2 regular cab pickup equipped with the 6.2-liter . Ford used For reference, this section from the Ford MPC is posted . Theres an easy way to tell an 8-inch apart from a 9-inch. 4. There are four versions of the nodular iron third members that were produced from the factory. It was not the only axle used, but was by far one of 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 third member supports all of the gears and bearings, which allows for easier gear ratio swaps if you have multiple third members. Here is a picture of the milling machine cutting new spline teeth after the axle has been cut to length. SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read. 1958-1959 two dimples on the back of housing, flat center band, some had drain holes. These axles even have a unique bolt pattern of five on 5 inches. 1957 . At this width, many were used in street rod applications without modifi cation. 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(The third digit of the axle code identifies the ratio and/or capacity of the front axle, if applicable. Note the two lower bolts at 6 and 7 oclock have straight access with a socket. Read more: CV Axle Boot: Overview, Signs, And Replacement. the few cars and early Broncos (and some early trucks) which received The 1966 Mustang had 14 possible rear gear ratio/differential combinations. Also notice the part number and metal axle tag. same width, but the distance between spring perches is different between We offer a guide to follow when selecting a new set of brake pads for your race or street car. Generally, aftermarket shafts have to be purchased This particular pinion cartridge is well reinforced and much stronger than the stock production cartridge. The 7.5 should be plenty adequate for the application you describe, but an 8.8 is best. . 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. Mustangs and Fairlanes. As part of my research, I went to renowned Currie Enterprises and gathered one of just about every different 9-inch axle variant. Spring perches must be cut and re-welded in order carriers both, as well as with the spline count on the axle shafts. 100 x 4.12. The Maverick 8" or Ranger 7.5 and 8.8 are good options. by the size of the nuts and thread used to retain the brake backing plates The unit on the top left seems to be nodular iron but requires a little more investigation to verify. the best. Ford Differential Axle Codes. You are looking for a nodular iron case, with its telltale N cast into the front or inside wall. Some axle shafts can be shortened and a new spline machined in place. The same applies to vehicles with codes containing numbers alone. Richmond Tech Support. Ford 9-inch can be found under 1974-1986 F-150s and 1978-1986 Broncos. You bring the gumption. Therefore, these axle assemblies require better quality oil and good underbody airflow to keep the unit cool. 2. 31-spline car shafts. It can also help in identifying the axle ratio of your particular vehicle. 31-spline carriers and axle shafts. The complete guide to master any grease gun, Battery vs. Starter vs. Alternator: How to jumpstart even the most stubborn of car. Give us a call at 800-216-1632 to get started. the best. Customers are invited to participate in a survey administered by MaritzCX, an independent, third-party supplier. it was very complete. This pinion shows excessive wear on the trunnion surface and should not be re-used. There are three bearings on the pinion shaft: the two traditional tapered roller bearings for the head and tail bearings with a third cylindrical roller bearing on the opposite end of the pinion head. Hypoid offset is the distance between the centerline of the pinion and the centerline of the ring gear. Ray. Pay attention to the Axle column, where you will get the correct Axle identification code similar to the one stamped on a metal tag on the rear-end axle. Start by opening the left drivers front door. There may be a second dash and more numbers and letters on the top row if there are specifics that are unique for interchange information. Save my name, email, and website in this browser for the next time I comment. Most of the later trucks The same applies to vehicles with codes containing numbers alone. Amateur restorer. 2. 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. 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. The Ford 8.8-inch axle has the same ring gear mounting distance (see Chapter 7) for all ratios, just like the 9-inch. It is the one most commonly Nine Inch Rear Axle. Measuring from axle flange to axle flange (measurement A in the diagram below) will give you total axle housing width. Ford used In 1963, Ford includedmore information. These tags provided information for the service technicians but wasnt that important for the vehicle assembly plants. Dana 50 - Ford Front Dana 60 - Standard or Reverse Rotation Ring Gear Diameter: 9" / 229mm Ring Gear Diameter: 9.75" / 248mm Pinion Diameter / Spline: 1.375" / 26 Pinion Diameter / Spline: 1.625" / 29 Ring Gear Bolts: (10) 7/16"x20 RH Ring Gear Bolts: (12) 1/2"x18 RH Cover Bolts: 10 Cover Bolts: 10 Carrier Breaks: None Carrier Breaks: 4.10 / 4.56 With their high-volume production, the two biggest quality problems were leaks from poor welds and poor alignment of the housings. The Ford 10.25-Inch Rear Axle Replaced The Dana 70 After 1985. 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. Axle 3.00, 3.25, and 3.55; so I know at least those ratios were all available from the factory in the 8 inch rears. 7.5 inch, 8.5 inch, 10.5 inch. A Lincoln Versaille rear is a 9" with 28 spline axles, big axle bearings, and disc brakes. The additional straddle mount pocket bearing provides additional support to the pinion head during high-torque events. Learn more. Remember to locate the Safety Standard Certification label on the left side door post as you open the door. There are also unique domestic special-option tags, which dont follow the format. The BOM will identify the model number, the gear ratio, the type of differential, and all component parts. These first became available on the 1964 Galaxies with the 427-ci engine and were found on many higher horsepower cars and trucks. Another bonus is that the axleshafts are of equal length, so youll Like the H in our case shows a car with a limited-slip differential. larger wheel bearing housings. This complex fixturing and welding process, coupled with fuel economy concerns, is what eventually led to their production demise. 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. and trucks throughout the 1970s. These variations include different-size drum brakes, disc brakes, and wheel hub arrangements. 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 narrowest production 9-inch axle is 56.375 inches. It is a column with the label AXLE on top and the Axle Code at the bottom. The 9-inch housings center section will not allow the socket to clear, and you must remove the two bottom retaining nuts with a boxed end wrench. Ratio & type. Hot rodders and drag racers use 9 Ford rear-ends and their aftermarket descendants in just about everything not just Ford cars and trucks. I guess this helps add to the splendor of the vehicle. There are several reasons for this. 31-spline carriers and "Traction Loc" style posi unit. The 9-inch ring and pinion is front-loaded into the rear end housing. Ford trucks and cars from 1968 onwards are equipped with the Ford Axle codes, which are clearly indicated on the certification plate. Vintage 1980 Yamaha Enticer Snowmobile Revival to Former Glory. Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear lower on the ring gear. This is a relatively common issue on these housings. None of which changes the strength of the axle shaft. This chart serves as a general guideline for axle fl ange-to-fl ange width based on different models and production years. Because Because The original applications are as follows: 1. housings. as the Mustang. 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 common carrier housing found is the C7AW-E. Any of the W-series cases do have a fill plug machined in them. The Independent Rear Suspension (IRS) used in '99-'04 Cobras and the current Mustang use almost the same differential as the standard 8.8. However, the critical aspects of the rear axle are the axle flanges and axle lengths. On this particular third member, the original copper washers that were under the factory fasteners have been discarded as well. 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. there is the letter "N" than this is a NODULAR CASE (GREAT) this housings appeared in either 1966 or 1967 with the familiar "Hump" It was also used in the 1983-1996 full-size Bronco, and E150 Econoline . Since the "Limited slip" or Locking rear end if one wants to use a 31-spline truck carrier in a car. Notice the 8.0-inch ring gear diameter cast into the rear cover below the fill plug. 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Generally most cars received the small axle bearings and 28-spline axle The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. CASE" The ring and pinion are then accessed, also from the front, by removing another 10 bolts. The Ford 9-inch has a reputation as a durable axle that can transmit enormous torque, and this is rightfully deserved. Our experts will help you find the correct ring and pinion set for your particular application. The 7.5" rear end is also flat on top and bottom. The cast-iron third member is installed from the front of the housing. mind as mentioned, the Fairlane spring perch distances were not the same It was required to repair a leaking weld. 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. Torsion Axle Vs. The 8.5- and 8.8-inch gears have even found themselves in the independent-carrier-style axles. There was a desire to have the stronger, larger tubes near the center of the axle but still retain the narrower tube ends for the wheel ends and the unique Shelby suspension brackets. The other identification information, 9, as observed from the chart, indicates a 3.55 gear ratio of the Ford F-150. Most of the time, the differences are in shock and spring mounting brackets and, of course, brake hardware. We offer Ford Racing ring and pinion gear sets in 3.55, 3.73, 4.10 and 4.56:1 gear ratios for solid axles, as well as Motive Gear's 3.90 and 4.30:1 gear sets. Generally most cars received the small axle bearings and 28-spline axle Ranger Station, Submit 67-71 Comet, Cougar, Mustang, Fairlane = 59.25 inches. 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. An assortment of Ford 9-inch axle stampings is welded together to create the housing. Restoration matching issues will be avoided since the right optioned components will be used to make the restoration. Learn how to hook up a 1-wire alternator on your vehicle. There are 4 different sets of rear axles that would have come stock in 66-77 Broncos. version of the case came into use in 1967 or in subsequent years, but it some 302 4V cars with optional gear ratios). at car swap meets and shows are the units pulled from trucks with the While the iron is molten, magnesium is added to increase the shear strength of the alloy. Our editors pick the products & services we write about. and 429CJ cars.From what I have seen don't expect to find them in 390 or 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. In most cases, the tag has been lost. Our example is going to assume a 6000 rpm redline and 26-inch-diameter tires. Also note there isn't a cover on the rear like most axles. Mustangs The LS swap is no doubt still going strong, but if youre planning to run an automatic behind your 4.8, 5.3, or 6.0L LS-powered ride, youll need to pay attention to a few items we discuss in this buyers guide. The 9-inch third-member bottom fasteners, on the left, can only be accessed with a wrench. 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). These axles had a stout 2.25-inch ring gear offset as compared to a 1.5-inch ring gear offset of the later 8.8-inch axle. Typically with just this information, you can cross reference what you need to know about the axle. - Rod Stroke Ratio - Stroke Size Rear Gear Requirements - Rear End Gear Ratio Needed - Speed from RPM, Rear & Trans. Read more: Torsion Axle Vs. WJ Handy Dad recommends safe practices when working on vehicles/homes and or with tools seen or implied in this video. Real World Hagerty Collector Car Insurance Claim Experience, How To Be Prepared For A Dyno Session And Not Waste Your Money, Holey Goat Father/Son Texas Road Trip 5 Days, and 2000+ Miles, Are You Killing The Hot Rod Community? It is still used in NASCAR racing as well. * Pro Gears are specifically designed for drag race only. The The other identification information, 9, as observed from the chart, indicates a 3.55 gear ratio of the Ford F-150. The top line typically starts with a three-digit axle model code (or the prefix of the part number), followed by a dash, and then thesuffix. . applications due to the demise of most performance engine options in the earlier housings used in cars from 1957 to mid 1960s tended to be the 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. GM X-Body Nova Complete Rear End Packages. The Ford Axle code chart is a handy tool for positraction replacements. On some tags, the first 2 digits don't appear on the tag, but they must be used to identify the axle. shafts. It is underneath one of the nuts that holds the third member in place. 289 Hipo cars.The N cases went with 31 spline centers and are for rugged How do I find the Axle Ratio and Limited Slip? 1957 no dimples, flat center band up the center of the rear cover, bottom drain plug. 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!. 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. if one wants to use a 31-spline truck carrier in a car. Differentials take the power from the rear axle and transfer it to the rear wheels by way of special gears. Ford 9.5 PRO GEAR* *PRO GEAR RATIO PART NO. You can find the axle code on the Safety Standard Certification label information. The tags were replaced with adhesive labels that are placed around the axle tube near the brake and wheel end. The This axle tag belongs to a 1977 F-150. (often referred to as a "POSI") came to be a popular option and Click on the 'Submit' button to find out how you The straddle-mounted pinion has a roller bearing in the gear case, which provides additional support for the pinion under heavy loads. Call 800.979.0122, 7am-10pm, everyday. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. * Pro Gears are specifically designed for drag race only. Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. 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. It is easy to locate the Axle Ratio from the Axle code, but first, we need to know how to get the Ford axle code itself. But 10.168 / 4.70 (to determine the equivalent rear-gear ratio) equals 2.16:1, which is not realistic. 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. for the swap to be performed. People have been climbing around scrap yards for years to find the best examples of the 9-inch axle. Ford codes may have one or two characters, but any code starts with a letter. A copy of the Ford Axle Code Chart is linked below in this article. The Ford Axle code will also help you identify your particular models engine capacity and the year/vehicle make. 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. Like the 9-inch, the 8-inch uses no carrier breaks, meaning you can put a 5.43:1 ring and pinion in a 2.79:1 rear without changing to a smaller differential carrier. There is a gear ratio stamped on the tag. The Lincoln Continental style of disc brakes use 11-inch rotors. The rear end width is important on shoebox Fords if you want some selection on wheels. For example: The tag will say: 350 for 3.50:1 ring and pinion gear ratio. From my piles of rare parts, here is an independent cast-iron 8.8-inch carrier axle. Original ratios are 2.47, 2.50, 2.75 or 3.0 with the 2.50 being the most common. The Lincoln LS and Jaguar S-type were equipped with an 8-inch, castaluminum, independent- style carrier. same width, but the distance between spring perches is different between Generally, aftermarket shafts have to be purchased 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. Ford Rear Axle Assembly Identification - Page 09: NOTE: Axle tag location and appearance may vary by application. The exception is the 2002-2003 Ford Explorer Sport which still used the solid rear 8.8-Inch axle.
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