ford 9 inch rear end gear ratios chart

The inches Keep in Snap On vs Daytona, Pittsburgh, ESCO, Husky, More. A simple formula to calculate Gear Ratio or Axle Ratios. 77-81 Lincoln Versailles. The Ford Axle code will also help you identify your particular models engine capacity and the year/vehicle make. 1972 and earlier, 31 spline axles have the ability to be shortened. The transmission yokes are CNC machined to assure concentricity and balance for ideal driveshaft operation. There is a machined roller bearing race on the pinion head portion that points at the differential opposite thetapered bearing races. A Ford 9 Inch Rear-End Widths and Potential Donor Cars - Roadkill Customs Gear Ratios Drag Strip Performance - 1/8 Mile Horsepower Requirements from MPH - 1/8 Mile Horsepower Requirements from ET - 1/8 Mile ET from MPH - MPH - Km/H in 1/4 Mile using Horsepower The Ford 9 inch rear end is one of the most popular axles in automotive history. shafts. Our editors pick the products & services we write about. Now you can see the C4AW-4025-B part number on the lower left unit, which verifies it as a nodular unit. However, the critical aspects of the rear axle are the axle flanges and axle lengths. For reference, this section from the Ford MPC is posted . The material and heat treating provide excellent wear service life, but doesn't handle shock loads as well as Pro 9 in gears. Width: all measurements are flange to flange. Hot rodders and drag racers use 9 Ford rear-ends and their aftermarket descendants in just about everything not just Ford cars and trucks. the Broncos from 1966 to 1977, they stayed with the 28-spline units. We stand behind our products with some of the smartest technicians in the industry. Please follow the below information and/or our measuring guide to help Which Ford Rear Gear Ratio is right for you - YouTube Proceed to match the code with its corresponding Axle Ratio column on the table to find the ratio. Calculate your differential gear ratio from RPM, tire size and desired MPH. The last set of numbers is the vehicle plant code. Ford 9-inch can be found under 1974-1986 F-150s and 1978-1986 Broncos. In order to verify a nodular unit, you need to look on the inside of the casting. Ford Rear Axle Assembly Identification - Page 09 much more difficult to locate. Both standard and W-series cases are made out of gray cast iron. Ford Axle code identification, Read more: Front Axle Of A Car: Types, Functions, And Replacement. Learn more. 67-73 medium and big block Mustangs and Cougars. 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. 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. The last set of digits on the top row on the right side is the date code. What gear ratio do I have in my GM or Chevrolet - Drivetrain The 1966 Mustang had 14 possible rear gear ratio/differential combinations. Are reviews modified or monitored before being published? These tags are typically quite beat up, twisted, and rusted over the years. 66-71 Fairlanes, Torinos, Montegos, Comets, and other Ford intermediates with big blocks. 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. H. 2.75 locking differential. Here is a picture of the milling machine cutting new spline teeth after the axle has been cut to length. Here is a down-and-dirty way of picking the best gearing for a particular car from three choices: 3.07:1 final drive with a wide-ratio transmission, a 3.07:1 final drive with a close-ratio transmission, and a 3.36:1 final drive with a close-ratio transmission. 66-75 small bearing, 2. Ford intermediates with big blocks. The center section is the differential assembly. It was not the only axle used, but was by far one of HOW TO CHOOSE YOUR GEAR RATIO FOR A 9-INCH REAREND - YouTube 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. N-case. It has a square design with four rounded corners and ten bolts. This combined with easy assembly makes it popular for fine-tuning a rear gear for any particular application. The Parts You Need to Build a Bulletproof Ford 9" Rear End When it comes down to actual shafts as well, since the truck lug Chevy Rear End Gear Ratio Chart - Autos Hub WJ Handy Dad recommends safe practices when working on vehicles/homes and or with tools seen or implied in this video. 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. 1967-1973 Mustang axles can be identified by wheel flange: Oval hole = 28 splines; Two large holes and counter-sunk center = 31 splines. The axle tag typically has two lines of numbers and letters stamped on it. A 1-wire alternators are perfect for engine swaps or just keeping things simple for your project. by Ford exist in the size of the outer axle bearings in the housings and The tubes do not have any welds, and you just see the witness marks of the parting line for the dies on the tubes. Refer to the Axle Ratio table to determine your rear axle ratio and Limited Slip. with 3/8" fine thread, while the larger bearing use 11/16" The Daytona- style cartridge allows for a larger pinion head bearing when compared to the standard pinion cartridge. 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. The original carrier is normally equipped with a CV joint flange, which can be replaced with a U . Ford 8.8 axle - Wikipedia Careful aftermarket shops and their stringent attention to repairing these housings are able to correct many of these issues. around 64-65 I believe.They are most often found behind the later 428CJ 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 TEETH 1 4.11 79-0097-1 37-9 1 4.29 79-0098-1 30-7 1 4.57 79-0101-1 32-7 2 5.14 79-0109-L 36-7 2 5.17 79-0112-L 31-6 2 5.20 79-0111-L 26-5 For Maximum . The 28-tooth axle shafts are typically tapered and cannot be shortened. Differential Gear Ratio Calculator. Note the ring diameter cast into the housing above the pinion. It was required to repair a leaking weld. Axles were similar to the Ford 9-inch 28-spline units. It is underneath one of the nuts that holds the third member in place. I reference these axles based on the ring gear nominal outside diameter in inches. Builder V8 Billys 1966 Ford Fairlane Twin Turbo 427 RestoMod was built for Street and Strip. This is by far the most common axle used by restorers, hot rodders, customizers, and racers. in cars and trucks. 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: A forum community dedicated to Ford performance owners and enthusiasts. Interestingly, the Ford axle uses the exact same size of tapered roller bearings as the GM 12-bolt. Later nickel content and better casting than the earlier single ribbed cases it The smaller 8-inch third member is on the right. socket size and 7/16" fine thread. 13 lovely chevy 10 bolt rear end gear ratio chart. actual car posi units, which were primarily 28-spline carriers, can be . Tech Tip: Ford 9" Rear Axle Information - Pit Stop USA There are several reasons for this. 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. Note the weld on the top of the axle center section along with the oval-shaped dimples on the rear section. at car swap meets and shows are the units pulled from trucks with the The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. it was very complete. Variations 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 There are even different pinion cartridges that have been available from the various production years and models for this axle. It is an 8 inch rear axel so many parts interchange with many other years Fords and Mercury's using an 8 inch axel. 74-75 medium duty large bearing, and. Rear Axles - WILD HORSES Early Ford Bronco Parts SHARE THIS ARTICLE: Please feel free to share this post on Facebook / Twitter / Google+ or any automotive Forums or blogs you read. The later With 568 Ford 9 Inch Parts for sale, you're sure to find the ideal parts . 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. * Pro Gears are specifically designed for drag race only. is by far the most abundant case being used in both full size Ford cars Original gear ratios range between 2.79:1 and 5.43:1, and aftermarket replacement gears are available for many ratios as well. This combined with easy assembly makes it popular for fine-tuning a rear gear for any particular application. These tags provided information for the service technicians but wasnt that important for the vehicle assembly plants. 31-spline carriers and axle shafts. 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. 1957 no dimples, flat center band up the center of the rear cover, bottom drain plug. The answer lies in several of the Ford 9-inchs design aspects, starting with the Ford 9 inch gears. You must confirm the flange version to be able to order the correct drum brake backing plates, disc brake conversion kit, or even the axles bearing retainer. smooth backside. GM Chevy S10 82-04 Complete 9" Rear End Package. Note: Rear axle ratios are available for 2008 and newer models. . (often referred to as a "POSI") came to be a popular option and It is still used in NASCAR racing as well. 9 inch ratio chart | Ford Muscle Cars Tech Forum narrowed rear ends due to the added strength in the middle. Pairing your vehicle with the wrong axle components will not only damage your vehicle but cost you a lot down the line. How To Recognize 9-Inch Housing The Ford 9-inch is an automobile axle manufactured by Ford Motor Company.It is known as one of the most popular axles in automotive history. Read more: Torsion Axle Vs. 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. The 31-spline car shafts. The 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. The N cases had two vertical ribs, three horizontal ribs, and a machined-in fill plug. Check it out. 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. bearings, 28 and 31 splines, 57-68 passenger car and 1/2 ton truck - medium duty, stronger than Mustang It's uncertain if this E 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. 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. It has more ground clearance than a Dana 60. some 302 4V cars with optional gear ratios). Mismatching issues are a big problem when it comes to automotive repairs. Where A=the first number (static reduction), Bi=Gear diameter, Bf=Ring Gear diameter, Cf= (Crown Wheel dia.) large-bearing semi-floating axles, and many can be found with hefty 31-spline The chart is based on RPM levels at 65 mph (105 kph) and a drive train running at a 1:1 gearing ratio, meaning the . This is because the supply is limited to Buyers Guide. 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. But if youre looking for an original, they can be spotted quite readily even without an axle identifycation tag. The Ford chart below contains a general decoder system for Ford pickup from the 1980s till the 1990s. Calculating the torque multiplication that your axle gears provide is quite easy. The Ford Axle code chart is a handy tool for positraction replacements. 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. Ratings and reviews are provided by customers who have either purchased a vehicle or visited a dealership for service. Ford Axle Code Chart: Everything You Need To Know - Gmund Cars Paint gmc dupont charts reference chart 1956 1959. 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. CLICK HERE to see a complete listing of front axle codes). 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. WJ Handy Dad assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. 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). The Applications: Ford Used The Dana 70 And Dana 70HD Axles In F-350 Trucks Up To 1985.5. The close-ratio and C4 289HP trans were mated to the 3.50, and occasionally to the 3.89 and 4.11. This allows quick gear ratio changes to accommodate different tracks or updates to your vehicles horsepower and torque ratings. 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. There were many instances of cuts and scratches from the thin steel tags sticking up on the axles. 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. Leaf Spring: The Similarities And Differences. shafts. Get any 3 for $25 plus shipping. The Ford Mustang and Thunderbird used this style for a few model years. Axle code. Discount is automatically applied. control arm mount. In this chapter I share a summary of decades of work on these axles. There are even different drum brake registers. 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. There are a few exceptions that you will see in the Ford Axle code chart. housings also evolved over the years: This particular pinion cartridge is well reinforced and much stronger than the stock production cartridge. 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. 67-70 Mustang = 59.25 inches. Axle Size/Strength Chart; Explained Videos; Tech Articles; 9-Inch Ford. Some axle shafts can be shortened and a new spline machined in place. The middle number is the ring gear diameter in inches, typically an 8 or 9. differences, 28-spline car axle shafts are much more abundant than the Our experts will help you find the correct ring and pinion set for your particular application. Because of the long production history of this axle, many variants are available. 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. I put together a whole collection of housings and third members. The typical 3 inch-diameter tubes can be a bit flimsy in higher-power applications. Ford Drive Ratios - Gearvendors pattern in most cases differed from the car, and due to the bearing size and this style of center carrier housing is best suited for drag cars or The certification plate can be located on the lock face of the left door edge. If you need the Rear Axle Ratio for a vehicle produced before 2008, contact ourCustomer Relationship Center via Chat or call us at 800-392-3673. Chevy differentials: how to rebuild the 10- and 12 . This was an 8.75- inch ring gear in a 9-inch housing. Ford non-overdrive transmissions include: C-4, three-speed, automatic. 31-spline carriers and "Traction Loc" style posi unit. Most 1972 and earlier 31-tooth spline shafts can be shortened and 1973 and later versions typically cannot be resplined. This format is also applicableto casting date codes. Note the two lower bolts at 6 and 7 oclock have straight access with a socket. Save my name, email, and website in this browser for the next time I comment. This is a major advantage compared to other rear axle systems because disassembly is faster and more convenient. What rear end ratio do I have in my Ford is it posi! The instructions below will walk you through the steps. The case This pinion shows excessive wear on the trunnion surface and should not be re-used. Standard Ford 9 inch gear sets are primarily used in street applications. The N-case. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. are you wanting the listing for the ratio tags? The A Lincoln Versaille rear is a 9" with 28 spline axles, big axle bearings, and disc brakes. 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 WFE-V2 helps us fi nd the decade of the 1970s. Most of the time, the differences are in shock and spring mounting brackets and, of course, brake hardware. the Broncos from 1966 to 1977, they stayed with the 28-spline units. An assortment of Ford 9-inch axle stampings is welded together to create the housing. Of course, if your budget allows, you can purchase an aftermarket iron case that is stronger than any factory case. (often referred to as a "POSI") came to be a popular option and On some tags, the first 2 digits don't appear on the tag, but they must be used to identify the axle. (The third digit of the axle code identifies the ratio and/or capacity of the front axle, if applicable. Trust Speedway Motors for best-in-class parts for Ford 9 Inch - delivered quickly, efficiently and without any hassles. 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. Using the Ford Axle code chart, you will get to negate all these issues with ease. Factory Original Gear Ratio | Vintage Mustang Forums Axle code is a combination of letters and numbers stamped on a small plate/tag attached to your vehicles rear axle. Tip: To search the Towing Guide, press CTRL + F to open a search box in your . pattern in most cases differed from the car, and due to the bearing size 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. 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. replaced, and that is why it remained in use for so long. The most 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 axle from around the 1957 model year right up until the early 1980s wood and natural gas. The bottom line begins with the ratio being the first set of numbers. Have The aftermarket Daytona-style pinion cartridge accommodates the larger and stronger pinion head bearing. Customers are invited to participate in a survey administered by MaritzCX, an independent, third-party supplier. The Ford 9 inch rear end is one of the most popular axles in automotive history. to the housing, the small bearing housings use 9/16" socket size nuts Our expert customer support technicians are available Monday through Friday from 7:00 a.m. until 7:00 p.m., CST. Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. for 1967-1970 (same as 1966-1969 Fairlane, Torino, Comet & Cyclone non That is your vehicles axle code. Mustang Rear End Gear Ratios & Axle Guide - LMR.com This will ensure that the correct replacement parts are purchased or salvaged from a junkyard to be used in the vehicle. This chart serves as a general guideline for axle fl ange-to-fl ange width based on different models and production years. This is a great upgrade component to use for high-power applications or if you are replacing your cartridge. There are 8.5-inch gears installed in these housings for lowerpower vehicle applications. Ford differential tags are very . for the 1971-1973 Mustangs - cars with 351 engines and up receiving the 9-inch This is an easy way to identify the third members, so youre sure to buy the correct axle. 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 was not the only axle used, but was by far one of What Is Car Battery Voltage And Why Is It Important? 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. $(document).ready( function () {$('#dtTable').DataTable( {paginate: false} );} ); 1954 Ford F100 / 2000 Lincoln Towncar Chassis Swap for Under $1,000, Tire Width Minimum, Maximum, and Ideal Size Chart by Wheel Width, An Online Magazine for DIY Hot Rod Builders. Ratio & type. medianet_width = "300"; Many companies, such as Currie Enterprises, Mark Williams Enterprises, Moser Engineering,and Strange Engineering, reproduce this design today. common carrier housing found is the C7AW-E. Generally, aftermarket shafts have to be purchased 100 x 4.12. (CROSS SECTION WIDTH x 0.ASPECT RATIO x 2 25.4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER. This is an example of the only Ford 9-inch version that utilized one-piece tubes. Measuring for your 9-inch axles requires a few basic measurements to be taken. 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. We will look at what axle codes are and how to identify the axle ratio from the code. trucks varied more, early half ton trucks got the 28-spline axles and So rare Ford dropped it after 66, when they also dropped the 7" Equalock. found in the trucks up to around 1982. Ford personnel and/or dealership personnel cannot modify or remove reviews. Axle Ratios - Gary's Garagemahal (the Bullnose bible) weakest and had abrupt ending but welded carrier centers to tubes and a Its called a 9 inch because the ring gear measures 9 inches. Ford 9-Inch Housing Identification and Axle Measurement - Speedway Motors The 9-inch housing's center section will not allow the socket to clear, and . The Ford 9 inch housing is a semi-floating, drop-out axle. In contrast, on the 9-inch, two nuts on the bottom at about the 6 and 7 oclock positions cannot be accessed with a socket and require a wrench. dimples. Ford 8-in. differential carriers | Hemmings Filed Under: Ford Tech Tips, Rebuild Ford Differentials, The Best Ford Tech Articles, 2023 DiY Ford. Dec 1, 2011. 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). Spring perches must be cut and re-welded in order 800-646-6718. Produced from 1957 to 1987 by the Ford Motor Company, it was used in full size . A copy of the Ford Axle Code Chart is linked below in this article. Find the word AXLE under the bar code. You bring the gumption. FORD FINAL DRIVE RATIOS. With so many better performing aftermarket options today, there is no reason to use these marginal brakes. Ford rear ends, or differentials, were manufactured by either the Dana Corporation or Ford. These axles even have a unique bolt pattern of five on 5 inches. The 7.5 should be plenty adequate for the application you describe, but an 8.8 is best.