ford 9 inch rear end gear ratios chart

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. It is a column with the label AXLE on top and the Axle Code at the bottom. These third members are the strongest of the production cases and the most desired. Here is a quick visual summary: The 1957 housings do not have dimples on them and have an oil drain plug. Ranger 66-71 Fairlanes, Torinos, Montegos, Comets, and other Ford intermediates with big blocks. Axles Tubes Are 4-Inches. The larger offset is better for strength and noise but worse for sliding and efficiency. Later The unit on the top left seems to be nodular iron but requires a little more investigation to verify. Ford non-overdrive transmissions include: C-4, three-speed, automatic. Performance Front & Rearends GM Vehicles The bearing cups are in the pinion cartridge and the third bearing trunnion roller bearing is located in the gear case. wheel drives) right up until about 1982, these housings are by far the The 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. Spring perches must be cut and re-welded in order 4. It has been said that it has a higher Builder V8 Billys 1966 Ford Fairlane Twin Turbo 427 RestoMod was built for Street and Strip. Original ratios are 2.47, 2.50, 2.75 or 3.0 with the 2.50 being the most common. GM Truck Complete Rear End Packages. You can then enter any term, such as Axle Ratio,to search the guide. No. The desirable N-style, nodular-iron gear cases are available in four different versions. Here are the internal sides of the same three units. This is a typical axle tag that has been removed from the third member. It may not be a stock or original Ford 9 inch rear end, but it carries the originals dimensions and specs and for all intents and purposes they are still considered a Ford 9 inch. CASE" This bearing is one of the reasons that the 9-inch has the reputation for being bulletproof. The Ford 9-inch can be found under 1974-1986 F-150s and 1978-1986 Broncos. Additionally, the Ford 9-inch utilizes a removable center section, often referred to as the Ford 9-inch pumpkin, Ford 9-inch chunk, Ford 9 inch third member, or even a Ford 9-inch pig! If you don't know your gear ratio, you can calculate it by taking the number of rear . Ford Axle code identification, Read more: Front Axle Of A Car: Types, Functions, And Replacement. The certification plate can be located on the lock face of the left door edge. Here is an example of a weld repair on a factory original housing. About | Contact | Terms | Privacy. Hypoid offset is the distance between the centerline of the pinion and the centerline of the ring gear. There may be other labels attached to that pillar so pay attention to one that looks similar to the one below. Housing end bolt patterns can be confirmed on the bottom of the axle order form. Along with the many different brake and wheel end varieties, many different styles of axle shaft ends were manufactured. The case medianet_crid = "364974658"; and trucks throughout the 1970s. Cost and complexity are two. Watch the video for all the details and you'll wonder why your shop hasn't had a set sooner! Using the correct part is imperative to engine longevity and proper drivetrain assembly. When you look on the inside, you see WAB- 4025A. replaced, and that is why it remained in use for so long. inches Generally, aftermarket shafts have to be purchased 56" the axle from around the 1957 model year right up until the early 1980s There are also unique domestic special-option tags, which dont follow the format. Ford used narrowed rear ends due to the added strength in the middle. Your email address will not be published. The first number is the last digit of the model year of the decade, the next digit is a letter and represents the month (A is for January, B is for February, and so on), and the last two digits represent the day of the month. and this style of center carrier housing is best suited for drag cars or First, you need to understand some fundamentals of the Ford axles to help guide your quest. weakest and had abrupt ending but welded carrier centers to tubes and a Only the N-series cases are made out of the stronger, more desirable, nodular iron. and Fairlane axle housings are often grouped together because they are the This chart references the connection between the month codes and the actual month. The most 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. 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. Projector vs. Reflector: Plan to upgrade your headlights? The primary purpose of this plate is to show you if your vehicle is equipped with a limited-slip to rear-end differential. in cars and trucks. 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. same width, but the distance between spring perches is different between The Ford 8.8-inch axle has a cast center section and the internal components are installed from the rear. GM Tri 5 55-57 Chevy Complete 9" Rear End Package. . can get your submission posted and acknowledged The WFE-V2 helps us fi nd the decade of the 1970s. Most of socket size and 7/16" fine thread. If the axle tag is missing, as most are, you need to remove the third member in order to know what ratio you have and if it has a limited-slip or not. This is a relatively common issue on these housings. 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). These tags provided information for the service technicians but wasnt that important for the vehicle assembly plants. small bearing housing can be differentiated from a large bearing housing i.e. Are reviews modified or monitored before being published? 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. mind as mentioned, the Fairlane spring perch distances were not the same 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? The leaking weld area is then ground down and a MIG or TIG welder is used for the repair. For example: 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. There is typically a stamped steel cover that must be removed to gain access to the internals. Another bonus is that the axleshafts are of equal length, so youll 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. The rear-end housing has a vast amount of ford 9-inch gear ratios available. and 429CJ cars.From what I have seen don't expect to find them in 390 or We stand behind our products with some of the smartest technicians in the industry. Learn more. 1958-1959 two dimples on the back of housing, flat center band, some had drain holes. These labels have a specific code that is similar to the axle code on the 9-inch axles. station wagons-cars with 351 and up engines received 9-inch units - as did actual car posi units, which were primarily 28-spline carriers, can be 31-spline carriers and axle shafts. 3. There are 8.5-inch gears installed in these housings for lowerpower vehicle applications. It is the one most commonly Strange Engineerings superior line of Chrome Moly Transmission yokes are manufactured from high quality forgings and fully heat treated to achieve maximum tensile strength. them. The Daytona- style cartridge allows for a larger pinion head bearing when compared to the standard pinion cartridge. There are several reasons for this. 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. It's uncertain if this E 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. The 8.5- and 8.8-inch gears have even found themselves in the independent-carrier-style axles. 4. 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. 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. (final drop). The Maverick 8" or Ranger 7.5 and 8.8 are good options. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. actual car posi units, which were primarily 28-spline carriers, can be Note the weld on the top of the axle center section along with the oval-shaped dimples on the rear section. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not WJ Handy Dad.As an Amazon Associate I earn from qualifying purchases 9-Inch Standard Ring And Pinion Gear Sets (3.00 to 6.50 Ratios) $240.00. Drag Racing 101 ~ Everything You Need to Know! 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. 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. It's uncertain if this E Save my name, email, and website in this browser for the next time I comment. The Ford Axle code chart is a handy tool for positraction replacements. the few cars and early Broncos (and some early trucks) which received The Ford version uses larger axle shafts and different lube flow strategy. You will need to get your hands on your manufacturers axle code chart for this part. Ranger Station, Submit The original carrier is normally equipped with a CV joint flange, which can be replaced with a U . features the legendary Ford 9-inch ring and pinion strength, 5-on-5.5 lug 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 used what is referred to as a The N cases typically came with the larger Daytona-style pinion support bearing, and 31-spline axle shafts. 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. 70's. SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read. Home / Performance Front & Rearends / Parts Department / Ring & Pinion Sets / 9-Inch Ford. 67-71 Comet, Cougar, Mustang, Fairlane = 59.25 inches. Chevy differentials: how to rebuild the 10- and 12 . Richmond Tech Support. Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear lower on the ring gear. (See Chapter 8 for how to install a 9-inch in a classic 1957 Chevy Bel Air as a performance upgrade.). trucks varied more, early half ton trucks got the 28-spline axles and * Coupon does not apply to Oval Size Matters T-Shirt. earlier housings used in cars from 1957 to mid 1960s tended to be the Get any 3 for $25 plus shipping. The large bearing size was available with fi ve different brake drum widths. The letters I and O are skipped to avoid confusion with the numbers one and zero. 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 . Ford codes may have one or two characters, but any code starts with a letter. 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 large 9-inch diameter ring gear (where the axle derives its name from), combined with its offset to the pinion gear makes for a larger ring and pinion contact surface area, increasing strength. If you are looking for an N case or think that you have found one of these desirable axles, make certain to examine it closely. * Pro Gears are specifically designed for drag race only. This was offered on the 1960 F-100 truck. larger wheel bearing housings. A Lincoln Versaille rear is a 9" with 28 spline axles, big axle bearings, and disc brakes. The case The tags were replaced with adhesive labels that are placed around the axle tube near the brake and wheel end. So dont be surprised that most of these axles leak from the welds. At this width, many were used in street rod applications without modifi cation. 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. 74-75 medium duty large bearing, and. used the 9-inch rear, regardless of engine size. Finding the location of this certification plate is easy. Applications: Ford Used The Dana 70 And Dana 70HD Axles In F-350 Trucks Up To 1985.5. Here is an example of 11 x 2-inch drums brakes with the small bearing size on the left and the large Torino style on the right. This is when making a few phone calls to reputable axle builders can be helpful. 8. Using this data, hopefully you can decide whether you want a 2.73, 3.08, 3.27, 3.55, 3.73, 4.10, or some other gear in your car. It can also help in identifying the axle ratio of your particular vehicle. (The third digit of the axle code identifies the ratio and/or capacity of the front axle, if applicable. - as in the Mustang line, most however never received a factory 9-inch). the early housings are ok for the average street performance cars. Because of the long production history of this axle, many variants are available. Amateur restorer. 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. This pinion has the tapered bearings and collapsible spacer in place. Mustangs and Fairlanes. Variations Restoration matching issues will be avoided since the right optioned components will be used to make the restoration. Again, the overall first-gear ratio with the TH400 and 4.10:1 rear gear would be 10.168:1. The other identification information, 9, as observed from the chart, indicates a 3.55 gear ratio of the Ford F-150. This strengthens the whole rear end assembly. Any sufficiently advanced technology is indistinguishable from magic . The Godfather of Performance Axles-The Venerable Ford 9-Inch, Ford 9-Inch Axle And Bearing Retainer Retains The Axle In Case of Breakage, Checking A Ford Axle With a Deep Socket To Confirm If It Is a 8-Inch or 9-Inch, Ford 9-Inch Rear End Axle Flange Identification, Measuring a Ford 9-Inch Axle Housing and Axle Lengths. Measuring from the outside of the axle flange to the centerline of the pinion gear/nut will give you the correct axle length required (B and C measurements below). Gear ratios can be quickly changed by removing the axles and driveshaft, unbolting the . 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. Unless you are building a Pinto or straight six-cylinder vehicle, you want to avoid it. On this particular third member, the original copper washers that were under the factory fasteners have been discarded as well. Gross Vehicle Weight ( GVW ) would Select the Towing Guide for your vehicle's model year. of course most desirable is the N case, first used on the 427 Galaxies Mustangs and Fairlanes. In 1963, Ford includedmore information. A forum community dedicated to Ford performance owners and enthusiasts. Before you embark on the rebuild and start scouring local scrap yards and online websites, it will be helpful to understand what to look for and what to avoid in these axles. The code, 4L11, tells us that it is a 4.11:1 ratio with a limited-slip or Traction-Lok differential. For reference, this section from the Ford MPC is posted . The axle code in our example, H9, has a specific meaning. 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. I reference these axles based on the ring gear nominal outside diameter in inches. This is not a nodular unit. Here is an example to help you through. Keep in 1967-1973 Mustang axles identified by wheel flange: two large holes and counter sunk center - 31 splines. 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. Now that you have identified the axle code, let us know the axle ratio. 2. 31-spline car shafts. 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. Note the ring diameter cast into the housing above the pinion. The 8.8" rear end is flat on the top and the bottom as well as the left and right. Ironically, 8.0-inch independent carriers were made in cast iron. The center section is the differential assembly. From my piles of rare parts, here is an independent cast-iron 8.8-inch carrier axle. This will ensure that the correct replacement parts are purchased or salvaged from a junkyard to be used in the vehicle. The ranger truck works good with a 9-inch from a You are correct sir, these are the standard ratios for 65-66. Read more: CV Axle Boot: Overview, Signs, And Replacement. This is because the supply is limited to only need to carry one spare should you choose to. trucks varied more, early half ton trucks got the 28-spline axles and The additional straddle mount pocket bearing provides additional support to the pinion head during high-torque events. 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). It is as easy to cut down as any other 8 or 9 inch Ford axel. The very rare optional 6 cylinder rear was the 3.50. First, the pinion shaft housing is removed from the front of the housing by removing five bolts. For the Ford 9" rear end to be smaller and lighter than a Dana 60, the weight has to come from somewhere. 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. But 10.168 / 4.70 (to determine the equivalent rear-gear ratio) equals 2.16:1, which is not realistic. Anyone know? What Is Car Battery Voltage And Why Is It Important? The 10,41 gear ratio is also great for off-road activities . 31-spline axles and carriers for most trucks. These axles did have metal axle tags similar to the 9-inch axles but they were slowly phased out as vehicle programs were updated. A copy of the Ford Axle Code Chart is linked below in this article. Pairing your vehicle with the wrong axle components will not only damage your vehicle but cost you a lot down the line. and this style of center carrier housing is best suited for drag cars or "Pro" gears are designed specifically for drag racing. Ford 9 inch Gears. duty.And believe it or not, they were also used in some FE equipped Ford for 1967-1970 (same as 1966-1969 Fairlane, Torino, Comet & Cyclone non . 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. JavaScript is disabled. Customers are invited to participate in a survey administered by MaritzCX, an independent, third-party supplier. is by far the most abundant case being used in both full size Ford cars Note: Rear axle ratios are available for 2008 and newer models. The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. The engines flexplate is a critical part to transferring power to your drivetrain. The housings also evolved over the years: The much more difficult to locate. most abundant. It also has a 9-inch ring gear. If measuring the drum-to-drum distance, add .200-inch to these values. Keep in The 8.8 is a traditional semi-fl oat Salisbury axle with C-washers for axle retention. Read this first! Select the Towing Guide for your vehicle's model year. 9-inch complete rear axle is approximately 35 pounds heavier than an 8.8 rear axle with approximately the same components. them. in the backside middle and stronger tubes. There are 4 different sets of rear axles that would have come stock in 66-77 Broncos. 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. The "rough" This allows quick gear ratio changes to accommodate different tracks or updates to your vehicles horsepower and torque ratings. 7.5 inch, 8.5 inch, 10.5 inch. Use this information at your own risk. 1957 no dimples, flat center band up the center of the rear cover, bottom drain plug. Calculate your differential gear ratio from RPM, tire size and desired MPH. Enter the required Overall Width, Pinion Offset (location), Brake Space and Drum/Rotor thickness to find axle length and housing width. nickel content and better casting than the earlier single ribbed cases it 66-75 small bearing, 2. On some tags, the first 2 digits don't appear on the tag, but they must be used to identify the axle. the best. This is 2.25 inches for the Ford 9-inch and 1.5 inches for the 8.8-inch axle. Note the two lower bolts at 6 and 7 oclock have straight access with a socket. 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. I'm not responsible for incorrect information, Width: all measurements are flange to flange, Ford Rear Axle Assembly Identification - Page 01 - FORDification.com. Info To Share? Differential Gear Ratio Calculator. Ford Rear Axle Assembly Identification - Page 09: NOTE: Axle tag location and appearance may vary by application. You can install a true 9-inch gear in these housings as well. Ratings and reviews are provided by customers who have either purchased a vehicle or visited a dealership for service. The N cases had two vertical ribs, three horizontal ribs, and a machined-in fill plug. Leaf Spring: The Similarities And Differences. Remember to locate the Safety Standard Certification label on the left side door post as you open the door. The straddle-mounted pinion has a roller bearing in the gear case, which provides additional support for the pinion under heavy loads. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. smooth backside. One exception to this was Some axle shafts can be shortened and a new spline machined in place. carriers, while sometime in the early 70's the switch was made to mostly 70's. Call 800.979.0122, 7am-10pm, everyday. Start by opening the left drivers front door. Many people are not aware that Ford made a smaller banjo axle and confuse the 8-inch for a 9-inch. 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. Mustangs Find your transmission and rear gear multiplier below. But it will also use more fuel in all situations because the engine's rpm will be higher. The tubes do not have any welds, and you just see the witness marks of the parting line for the dies on the tubes. differences, 28-spline car axle shafts are much more abundant than the Mismatching issues are a big problem when it comes to automotive repairs. It was not the only axle used, but was by far one of Calculating the torque multiplication that your axle gears provide is quite easy. Its called a 9 inch because the ring gear measures 9 inches. Automotive Technical and Reference Information, Project Cars, Trucks and Salvage Vehicles For Sale, 1967-1970 Mustang, Fairlane, Comet, Cougar, 1967-1971 Comet, Cougar, Mustang, Fairlane, 1967-1973 Mustang, Torino, Ranchero, Fairlane, 1967-1973 medium and big block Mustang and Cougar, 1966-1971 Fairlane, Torino, Montego, Comet, and other Fords with big-block engines, 1977-1981 Lincoln Versailles and Trucks .

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