ford 9 inch rear end gear ratios chart

Content. Mustangs and Fairlanes. 1/2 ton 4X4 pickups! version of the case came into use in 1967 or in subsequent years, but it Ford used The larger offset is better for strength and noise but worse for sliding and efficiency. with 3/8" fine thread, while the larger bearing use 11/16" applications due to the demise of most performance engine options in the The date code on this axle tag is 7AC, and it corresponds to the 7th year, 1st month (January), and 3rd day. There are 4 different sets of rear axles that would have come stock in 66-77 Broncos. The 8.5- and 8.8-inch gears have even found themselves in the independent-carrier-style axles. 3. 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). The 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 Lincoln Continental style of disc brakes use 11-inch rotors. You can do this by multiplying by the gear ratio. and Fairlane axle housings are often grouped together because they are the Another bonus is that the axleshafts are of equal length, so youll The Ford 9 inch rear end is one of the most popular axles in automotive history. - as in the Mustang line, most however never received a factory 9-inch). 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. This larger offset (hypoid distance) between ring-gear . 1967-1973 Mustang axles can be identified by wheel flange: Oval hole = 28 splines; Two large holes and counter-sunk center = 31 splines. bearings, 28 and 31 splines, 57-68 passenger car and 1/2 ton truck - medium duty, stronger than Mustang The image below shows the Safety Label of a Ford Truck. Of course, if your budget allows, you can purchase an aftermarket iron case that is stronger than any factory case. 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). (often referred to as a "POSI") came to be a popular option and socket size and 7/16" fine thread. Keep in For the Ford 9" rear end to be smaller and lighter than a Dana 60, the weight has to come from somewhere. by Ford exist in the size of the outer axle bearings in the housings and This axle tag belongs to a 1977 F-150. nickel content and better casting than the earlier single ribbed cases it much more difficult to locate. "N Case" was no longer needed for passenger car/truck (often referred to as a "POSI") came to be a popular option and of course most desirable is the N case, first used on the 427 Galaxies 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 narrowest production 9-inch axle is 56.375 inches. This roadster sounds amazing, goes hard and turns heads wherever it goes. Here is an example to help you through. The first two digits of the axle code identify the ratio and capacity of the rear axle. 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. These first became available on the 1964 Galaxies with the 427-ci engine and were found on many higher horsepower cars and trucks. 9-inch complete rear axle is approximately 35 pounds heavier than an 8.8 rear axle with approximately the same components. The Maverick 8" or Ranger 7.5 and 8.8 are good options. 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? 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 Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. and 429CJ cars.From what I have seen don't expect to find them in 390 or Comet that has had a HIPO SMALL block with 31-splines and a locker. There is a huge aftermarket support for this axle design. Ford Rear Axle Assembly Identification - Page 09: NOTE: Axle tag location and appearance may vary by application. 61.25 inches, 1967-1971 Comets, Cougars, Fairlanes 59.25 inches, 1967-1973 medium and big block Mustangs and Cougars, 1966-1971 Fairlanes, Torinos, Montegos, Comets, and other This was offered on the 1960 F-100 truck. Note the ring diameter cast into the housing above the pinion. Read more: CV Axle Boot: Overview, Signs, And Replacement. 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. 1967-1973 Mustang axles identified by wheel flange: two large holes and counter sunk center - 31 splines. The letters I and O are skipped to avoid confusion with the numbers one and zero. GM Chevy S10 82-04 Complete 9" Rear End Package. It was then replaced by the Ford 8.8 inch rear axle. as the Mustang. 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. 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 . Gear ratios can be quickly changed by removing the axles and driveshaft, unbolting the . That is your vehicles axle code. - Rod Stroke Ratio - Stroke Size Rear Gear Requirements - Rear End Gear Ratio Needed - Speed from RPM, Rear & Trans. The "rough" You are correct sir, these are the standard ratios for 65-66. if not I have other 9" info archived I can post. Ford trucks and cars from 1968 onwards are equipped with the Ford Axle codes, which are clearly indicated on the certification plate. But it will also use more fuel in all situations because the engine's rpm will be higher. 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. is by far the most abundant case being used in both full size Ford cars GM B-Body Complete 9" Rear End Packages. These third members are the strongest of the production cases and the most desired. Now you can see the C4AW-4025-B part number on the lower left unit, which verifies it as a nodular unit. Because of the long production history of this axle, many variants are available. widths I keep in mind for Mustangs are the following: 52" There are four versions of the nodular iron third members that were produced from the factory. inch diameter all the way to the backing plate, coil housings have upper for the 1971-1973 Mustangs - cars with 351 engines and up receiving the 9-inch differences, 28-spline car axle shafts are much more abundant than the There is a gear ratio stamped on the tag. On this particular third member, the original copper washers that were under the factory fasteners have been discarded as well. You can install a true 9-inch gear in these housings as well. 31-spline car shafts. This is not a nodular unit. Give us a call at 800-216-1632 to get started. widths I keep in mind for Mustangs are the following: wheel drives) right up until about 1982, these housings are by far the Watch the video for all the details and you'll wonder why your shop hasn't had a set sooner! The N cases typically came with the larger Daytona-style pinion support bearing, and 31-spline axle shafts. Ford 9.5 PRO GEAR* *PRO GEAR RATIO PART NO. The ring gear speed sensor is shown in the upper right-hand portion of the photograph. Some of the 9-inch truck differentials will have an exaggerated hump on the rear cover to . This allows quick gear ratio changes to accommodate different tracks or updates to your vehicles horsepower and torque ratings. . This is when making a few phone calls to reputable axle builders can be helpful. Of the four versions of the N case, three have an actual N cast into it right above the pinion cartridge. This is 2.25 inches for the Ford 9-inch and 1.5 inches for the 8.8-inch axle. It has a square design with four rounded corners and ten bolts. determine which axle housing many cars and trucks received. Measuring for your 9-inch axles requires a few basic measurements to be taken. "N This is by far the most common axle used by restorers, hot rodders, customizers, and racers. This sensor is for the anti-lock brake system. 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. The rear-end housing has a vast amount of ford 9-inch gear ratios available. The exception is the 2002-2003 Ford Explorer Sport which still used the solid rear 8.8-Inch axle. This was an 8.75- inch ring gear in a 9-inch housing. The I put together a whole collection of housings and third members. If measuring the drum-to-drum distance, add .200-inch to these values. Get any 3 for $25 plus shipping. The same applies to the rear 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. in cars and trucks. (It was later used for pick-ups and Broncos.) No. Performance Front & Rearends GM Vehicles 289 Hipo cars.The N cases went with 31 spline centers and are for rugged Discount is automatically applied. Most of some 302 4V cars with optional gear ratios). in the backside middle and stronger tubes. narrowed rear ends due to the added strength in the middle. 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 This strengthens the whole rear end assembly. It is a column with the label AXLE on top and the Axle Code at the bottom. 31-spline carriers and "Traction Loc" style posi unit. 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! 31-spline axles and carriers for most trucks. Along with the many different brake and wheel end varieties, many different styles of axle shaft ends were manufactured. Mustangs and Fairlanes. 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. 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. narrowed rear ends due to the added strength in the middle. Dec 1, 2011. 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. Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear lower on the ring gear. medianet_crid = "364974658"; 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. 54" A The same width, but the distance between spring perches is different between 77-81 Lincoln Versailles. There are a few exceptions that you will see in the Ford Axle code chart. T & C FORD TOP LOADER 4 SPEED WIDE RATIO 2ND GEAR 31 TOOTH showing . Its called a 9 inch because the ring gear measures 9 inches. These axles even have a unique bolt pattern of five on 5 inches. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. for 1965-1966 (the same width as 1964-1965 Falcons and 1962-1965 Fairlanes . Proceed to match the code with its corresponding Axle Ratio column on the table to find the ratio. Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. Repairing a twisted brake or throttle cable with a simple homemade tool in just minutes Easy and functional. Start by opening the left drivers front door. 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). Your email address will not be published. housings also evolved over the years: The This combined with easy assembly makes it popular for fine-tuning a rear gear for any particular application. 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 It is common to find a 9-inch in a old Falcon or The original applications are as follows: 1. There were many instances of cuts and scratches from the thin steel tags sticking up on the axles. A simple formula to calculate Gear Ratio or Axle Ratios.