them. A simple formula to calculate Gear Ratio or Axle Ratios. 59.25 inches to 61.25 inches, 1957-1959 Ranchero and station wagon rears, 57.25 inches, 1967-1971 Comet, Cougar, Mustang, Fairlane, 59.25 inches, 1967 Fairlane 63.50 inches (coil springs), 1957-1959 Ranchero and station wagon 57.25 The image below shows the Safety Label of a Ford Truck. The fourth version did not have the N in the casting on the outside but still retained the rib structure. 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. Ranger many half ton trucks continued to utilize the 9-inch (both 2 wheel & 4 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. Because of the long production history of this axle, many variants are available. with 3/8" fine thread, while the larger bearing use 11/16" The same applies to the rear differential. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Using the Ford Axle code chart, you will get to negate all these issues with ease. There is a gear ratio stamped on the tag. It is common to find a 9-inch in a old Falcon or The fundamental difference between these axles is how the gears are supported and which end of the axle housing (front or back) that they are assembled from. 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. Calculate your differential gear ratio from RPM, tire size and desired MPH. The format has changed over the years but mostly follow this sequence:. mind as mentioned, the Fairlane spring perch distances were not the same wheel drives) right up until about 1982, these housings are by far the earlier housings used in cars from 1957 to mid 1960s tended to be the 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 Another bonus is that the axleshafts are of equal length, so youll The Ford chart below contains a general decoder system for Ford pickup from the 1980s till the 1990s. While the iron is molten, magnesium is added to increase the shear strength of the alloy. Axle Ratio = (RPM X Tire Size)/ (Speed (MPH) X 336) Example 4.88 = (2881 X 37)/ (65 X 336) Torsion Axle Vs. 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. socket size and 7/16" fine thread. 67-73 medium and big block Mustangs and Cougars. Restoration matching issues will be avoided since the right optioned components will be used to make the restoration. A strong 9" with a nodular diff and 31 spline axles is fairly comparable in strength to a stock Dana 60 rear end. the best. The third member supports all of the gears and bearings, which allows for easier gear ratio swaps if you have multiple third members. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. Pairing your vehicle with the wrong axle components will not only damage your vehicle but cost you a lot down the line. Original ratios are 2.47, 2.50, 2.75 or 3.0 with the 2.50 being the most common. Gross Vehicle Weight ( GVW ) would There may be other labels attached to that pillar so pay attention to one that looks similar to the one below. 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. I put together a whole collection of housings and third members. Later There are also unique domestic special-option tags, which dont follow the format. The Ford 9 inch housing is a semi-floating, drop-out axle. Many aftermarket companies produce 9 Ford equivalent rear axles for the drag racing and hot rod industry. for the 1971-1973 Mustangs - cars with 351 engines and up receiving the 9-inch 31-spline carriers and "Traction Loc" style posi unit. middle of case it is a good IRON type IF in the very center of this case for 1965-1966 (the same width as 1964-1965 Falcons and 1962-1965 Fairlanes Its called a 9 inch because the ring gear measures 9 inches. for 1965-1966 (the same width as 1964-1965 Falcons and 1962-1965 Fairlanes Ford 9-inch can be found under 1974-1986 F-150s and 1978-1986 Broncos. Save my name, email, and website in this browser for the next time I comment. We offer a guide to follow when selecting a new set of brake pads for your race or street car. 289 Hipo cars.The N cases went with 31 spline centers and are for rugged The primary purpose of this plate is to show you if your vehicle is equipped with a limited-slip to rear-end differential. 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. Our Mopar flexplate buyers guide will help. Housing end bolt patterns can be confirmed on the bottom of the axle order form. 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. The material and heat treating provide excellent wear service life, but doesn't handle shock loads as well as Pro 9 in gears. There is typically a stamped steel cover that must be removed to gain access to the internals. The Ford 9-inch is the most desirable drag racing rear end because it has a removable carrier, which allows quick rear end changes. 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 Mustang Shelby GT housing is an easy one to spot, albeit rare, because it has extreme tapering of the axle tubes at the ends. All of the 8-inch case nuts can be accessed with a socket. Standard Ford 9 inch gear sets are primarily used in street applications. A 2-inch version is not shown. and trucks throughout the 1970s. This is a major advantage compared to other rear axle systems because disassembly is faster and more convenient. The later Some of the heavier cars like the Galaxies also received the When measuring from the top left bolt to the bottom left bolt, the 8.8" rear end will measure 11" from bolt to bolt. (The third digit of the axle code identifies the ratio and/or capacity of the front axle, if applicable. 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. 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. 100 x 4.12. (often referred to as a "POSI") came to be a popular option and Ford used You Axle Ratio : Axle Ratio : Diesel: 5.13: 4.10: 3.55: Gas: 4.10: 3.55 : Trans Ratio: . The 8.5- and 8.8-inch gears have even found themselves in the independent-carrier-style axles. 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. If an L is included, it was equipped with a limited-slip differential or Traction- Lok. The later The repair process requires the axle to be disassembled and thoroughly cleaned. weakest and had abrupt ending but welded carrier centers to tubes and a With 568 Ford 9 Inch Parts for sale, you're sure to find the ideal parts . But 10.168 / 4.70 (to determine the equivalent rear-gear ratio) equals 2.16:1, which is not realistic. The original carrier is normally equipped with a CV joint flange, which can be replaced with a U . 8.75, 9.25, Ford 9 inch, and GM's 8.25 inch . Again, the overall first-gear ratio with the TH400 and 4.10:1 rear gear would be 10.168:1. Boss 429s, 427s, 428 CJ/SCJ and the 429 cars which received the 1/2 in Ring Gear Bolts: WCN-B: Ford Pass '63-64: 3.50: 9 in: NL4-1/2 in Ring Gear Bolts . nickel content and better casting than the earlier single ribbed cases it 9-Inch Standard Ring And Pinion Gear Sets (3.00 to 6.50 Ratios) $240.00. If you are building a 9-inch Ford rear end for your project know you have plenty of options in gear ratios, axles, bearings, brake kits, and much more! always looking for good content to share with There are a few exceptions that you will see in the Ford Axle code chart. the best. Details: Motive Gear . Click on the 'Submit' button to find out how you Call us at (864) 843-9275. H. 2.75 locking differential. The transmission yokes are CNC machined to assure concentricity and balance for ideal driveshaft operation. The Ford Axle code chart is a handy tool for positraction replacements. The case as the Mustang. The axle code in our example, H9, has a specific meaning. For example, Ford says the 2018 F-350 Super Duty 4x2 regular cab pickup equipped with the 6.2-liter . also received the larger axle bearings housings. can tell this is a 9-inch from the removable carrier on the front. If measuring the drum-to-drum distance, add .200-inch to these values. . 3. in cars and trucks. WJ Handy Dad assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Builder V8 Billys 1966 Ford Fairlane Twin Turbo 427 RestoMod was built for Street and Strip. wood and natural gas. It is still used in NASCAR racing as well. 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. Calculators. carriers, while sometime in the early 70's the switch was made to mostly pattern in most cases differed from the car, and due to the bearing size Comet that has had a HIPO SMALL block with 31-splines and a locker. Besides the styling of the Ford Edsel, even the axle shafts were very unusual. Ford intermediates with big blocks. Gears / Diffs / Install Kits Listed By Vehicle, Standard Gears & Pro Gears Dana / Ford / GM / Mopar, Strange T-Shirts. 4.09 Front, 4.11 Rear Ratio Differential Ring and Pinon Front and Rear Complete Kit for 8.5 Front (Inch), 9 Rear (Inch) (10 Front, Dropout Rear) . Keep in About | Contact | Terms | Privacy. 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! A metal axle tag is typically located on the driver-side front of the third member. Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear lower on the ring gear. This chart applies to all Ford non-overdirve transmissions, manual and automatic. housings also evolved over the years: 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. This not easily accomplished with integral carrier axles, like the GM 10- and 12-bolt. 2. for the swap to be performed. The Ford 9 inch rear end is one of the most popular axles in automotive history. Of course, if your budget allows, you can purchase an aftermarket iron case that is stronger than any factory case. Both axles share a common design and are often referred to as banjo style or third-member style. axleshafts. Check it out. more plentiful starting in the early 1970's, many of the units found today For a better experience, please enable JavaScript in your browser before proceeding. if so is this what you are looking for. features the legendary Ford 9-inch ring and pinion strength, 5-on-5.5 lug Well help you determine the correct flexplate for your Chevy engine in this buyers guide. Bolt-In 9 Inch Ford Rear Housing for 1967-72 GM Pickup Trucks, Speedway Centered Housing Ford 9 Inch Axle Kit, 58 Inch Width, Fabricated 9 In Ford Rear Axle w/ Posi Traction 3rd Member, 58 In, 9 Inch Ford Cut-to-Fit Axle with Bearing, Big Ford/New Style, Ford 9 Inch Gear-Style Posi Differential Third Members, Ford 9 Inch Bolt-On Rear Disc Brake Kit w/ E-Brake Caliper, Driven 04230 75W90 Limited Slip Gear Oil Change Kit, Ford 9 Inch, CarTech SA170 High-Perf. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. Only the N-series cases are made out of the stronger, more desirable, nodular iron. If the case has two verticle RIBS ,from top to 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. threatening to harm employees or others), Lack of adequate text (e.g., symbols, emojis and random letters), Reviews on the product and not the customers Sales or Service experience. 1. Generally, aftermarket shafts have to be purchased 77-81 Lincoln Versailles. The axle housings themselves had many different variations over time as well. For the Ford 9" rear end to be smaller and lighter than a Dana 60, the weight has to come from somewhere. 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. 1957 . Axles were similar to the Ford 9-inch 28-spline units. Along with the many different brake and wheel end varieties, many different styles of axle shaft ends were manufactured. JavaScript is disabled. This roadster sounds amazing, goes hard and turns heads wherever it goes. The exception is the 2002-2003 Ford Explorer Sport which still used the solid rear 8.8-Inch axle. Let's see, I have had 2.79. In the 1980s and 1990s, the Lincoln Versailles brakes and complete axles were highly sought after because it was the only way to get a 9-inch axle with discs in a 58-inchwide axle package. 66-75 large bearing, 3. for the swap to be performed. The last set of digits on the top row on the right side is the date code. . small bearing housing can be differentiated from a large bearing housing The Fora platform includes forum software by XenForo. I reference these axles based on the ring gear nominal outside diameter in inches. 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. 6. 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. 66-75 small bearing, 2. control arm mount. The instructions below will walk you through the steps. (It was later used for pick-ups and Broncos.) 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. Gross Vehicle Weight ( GVW ) would Drag Racing 101 ~ Everything You Need to Know! The The (CROSS SECTION WIDTH x 0.ASPECT RATIO x 2 25.4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER. duty.And believe it or not, they were also used in some FE equipped Ford The Maverick 8" or Ranger 7.5 and 8.8 are good options. Also notice the part number and metal axle tag. Variations 8. Here is an example of a weld repair on a factory original housing. 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. This case looked like a nodular unit from the front regarding rib structure but did not have the N on it. Applications: Ford Used The Dana 70 And Dana 70HD Axles In F-350 Trucks Up To 1985.5. version of the case came into use in 1967 or in subsequent years, but it Refer to the Axle Ratio table to determine your rear axle ratio and Limited Slip. The aftermarket Daytona-style pinion cartridge accommodates the larger and stronger pinion head bearing. the few cars and early Broncos (and some early trucks) which received Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. Measuring from axle flange to axle flange (measurement A in the diagram below) will give you total axle housing width. Ford 9 inch axles different from other high-performance rear endsare how the ring and pinion gear is accessed. Use this information at your own risk. It is the one most commonly station wagons-cars with 351 and up engines received 9-inch units - as did 1972 and earlier, 31 spline axles have the ability to be shortened. it was very complete. more plentiful starting in the early 1970's, many of the units found today smooth backside. With the pinion gear and differential in place, rear-end marking compound in place, and with the bearings only "snug" (just tight enough to eliminate any "play"), check the pinion depth by way of the contact pattern that can be found by the rotation of the pinion against the ring gear. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The most The rear end width is important on shoebox Fords if you want some selection on wheels. same width, but the distance between spring perches is different between by Ford exist in the size of the outer axle bearings in the housings and Careful aftermarket shops and their stringent attention to repairing these housings are able to correct many of these issues. 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 from around the 1957 model year right up until the early 1980s The first table is the code and gear ratio. People tend to be drawn to it like a magnet. determine which axle housing many cars and trucks received. GM A-Body Complete 9" Rear End Packages. Find your transmission and rear gear multiplier below. First, the pinion shaft housing is removed from the front of the housing by removing five bolts.
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