1973-1986 Ford Van 3/4 ton 65.25 inches. RPM - Rear End Ratio Chart: The chart below may be of some help in deciding what rear end ratio is right for you. The following table shows the various Ford part numbers and gear ratios for the matched ring and pinion gear sets used on 1928 through 1934 Model A (103-1/2" WB) and Model B (106" WB) Ford car and commercial chassis, not trucks. Contemplating between 3.25 and 3.50 gear ratios. Ford 9" - 3.25 Yukon Ring and Pinion. Free UPS Ground Delivery in lower 48 States. I cannot say for ratios after 1978, I quit looking after I found what I needed so I don't know much after that date of manufacture. 4L80E trans. Like the H in our case shows a car with a limited-slip differential. 9 inch ID tag numbers: ID tag: Ratio: Ring Gear Diameter (in) ID tag: Ratio: Ring Gear Diameter (in) WDM-AH: 3.25:1: 9 : WCZ-S: 3.50:1: 9 : WCZ-T: 3.50:1: 9: WDC-DW: 2.75:1: 9 : WDC-EB: 2.75:1: 9: WDC-EE: 3.00:1: 9 : WDC-EH: 2.75:1: 9: WDC-EK: 3.00:1: 9 : WDC-EL: 2.50:1: 9: WDC-EM: 2.50:1: 9 : WDX-E: 2.75:1: 9: WCZ-H: 3.89:1: 9 : WCZ-J: 4.11:1: 9: WCZ-P: 3.50:1: 9 : WCZ-R: 3.89:1: 9: WFU The stamped numbers on the left or right axle tube can also identify the axle. 1957-1959 Ranchero and station wagon. 1975 Ford Boss Ranchero June 4, 2022; Big Turtle V 1999 Ford F-550 May 12, 2022; The last Ford 9-inch rear end to be installed in a truck was at the end of 1985, which concluded all (factory) production of the Ford 9-inch rear. Note: To Perform This Rebuild, You Should Have A Shop Manual That Lists Torque Specs, A Full. 66-75 large bearing, 3. The original applications are as follows: 1. 1966-1977 Bronco 58 inches 5-on-5 1/2 inch diameter bolt circle. 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. Only show this user. A high ratio gear is low, numerically. Ford Mustang Complete 9" Rear End Packages. also the granada-monarch versailles front disc's aare a bolt on. 2000 - 2002 Front Axle Model Designation changes. Our affordable aftermarket 3rd Member and Ford 9 inch center section components offer you an optimal rear differential setup for powerful racing results. Recent Featured Vehicles. 3.73s are available from the factory depending on package options. Ford - Differential IdentificationShop by your differential. The Axle Ratio is stamped on a Gear Ratio Tag on the axle cover. Owen Sound 07/04/2022. Street Car. 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 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. Write down that number. Stick a floor jack under the rear end, put it in neutral and rotate the passenger's rear wheel one complete revolution. 1971-1973 Mustang 61.25 inches. 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. Pro gears are designed specifically for drag racing. If you have ford car, Ford 9 inch gear ratios chart is useful to inspect what gear your car uses. The 6 cyl cars didn't have an 8 inch or 9 inch rear end, they have the 7 1/4 inch integral carrier, which looks kind of like a GM thing. Divide that number by 60. On the other end, you can get a kit like RuffStuff Specialties' 9" disc conversion. 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. Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear 4. The gears and the carrier have proven to be significantly stronger than the 10 and 12-bolt Chevrolet, which use smaller 8-1/2 and 8-7/8 diameter ring gears, respectively. These codes are arranged in alphanumeric order. You can do this by multiplying by the gear ratio. I lost .15et and almost 2mph when going from a 7.5" 10 bolt to a 9" (same gear ratio) But after breaking 3 10 bolts I had no desire to build another one. A guide to deciphering the rear axle code displayed on the VIN (warranty) tag of your 1973-1979 Ford truck. Available In Ratios From 3.89 Thru 6.20. 8 specifications: rg diameter 8.875" 8 7/16" x 20 rh threaded bolts pinion diameter 1.625" 28 splines cases:2.73 & numerically lower 2.50 open differential. FREE Shipping by Amazon. (CROSS SECTION WIDTH x 0.ASPECT RATIO x 2 25.4) + WHEEL DIAMETER = OVERALL TIRE DIAMETER. View our Top Ten 1969 Mustang photos. Axle code. There is a gear ratio stamped on the tag. GM Chevy S10 82-04 Complete 9" Rear End Package. Then the formula would be calculated as: (38*3.91)/30 giving you 4.95. If it goes about 3 1/2 times then you probably have about a 3.50, if it goes almost 4 times around then you have a 3.90 etc. GM Tri 5 55-57 Chevy Complete 9" Rear End Package. Compare Axle Ratios for all Years. 1967-1970 Mustang 59.25 inches. That is why I chose to use a Dana 44 in my CJ which has a more centered pinon. I suspect that Lincolns might have been the same. i.e. RuffStuff Weld-On Ford 9" Disc Brake Conversion Kit. We stand behind our products with some of the smartest technicians in the industry. To recognize a Locking 9" differential, look for a metal tag on one of the bolts that holds the center section to the housing. Third members for any Ford or Mercury using a removable carrier. 1965-1973 | Ford Mustang 1965-1973 | Mercury Cougar. A low ratio gear is high, numerically. 1972 Ford Van 3/4 ton 68 inches. The 1966 Mustang had 14 possible rear gear ratio/differential combinations. (C)opyright 2007-2022 MustangAttitude.com. A complete Currie 9-inch third member makes it easy to update your street rod, muscle car, or truck with a new gear ratio or performance differential. The first table is the code and gear ratio. The Ford 9 inch rear end is one of the most popular axles in automotive history. How To Identify 9 Inch Ford Housings Chart via Speedway Motors. Replacing a Mustang's stock rear gears with a higher ratio will give you quicker acceleration, greatly improving your 60 foot times--depending on what ratio you choose. Heat Treated for High Shock Loads. 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. This is often referred to ring and pinion ratio. Limited-Slip Differentials. A. We carry everything from the 8" IFS front end parts, to the large 10.5" rear end parts for F-Series trucks.We make it easy to verify your exact rear end by providing specs and year, make, and model applications for each 01: Ford 9 1977 Ford Axle Codes: Below is a axle code chart from 1977: Search This Site. 66-75 small bearing, 2. The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. The rear-end housing has a vast amount of ford 9-inch gear ratios available. Door 429. Axle Ratio = (RPM X Tire Size)/ (Speed (MPH) X 336) Example 4.88 = Hypoid offset is the distance between the centerline of the pinion and the centerline of the ring gear. Multiply that number by Another option for a TJ is using an 8.8 out of a late model Ford Explorer. Yukon Gear & Axle Standard Open and Positraction Carrier Cases. Pinion location in relation to ring gear. For example: The tag will say: 350 for 3.50:1 ring and pinion gear ratio. GM A-Body Complete 9" Rear End Packages. Pick the tire hiegth, pick your gear ratio. Ford attached an aluminum tag to one of the carrier bolts at the factory to aid in determining the gear ratio and build date of the 9-inch rear. Find many great new & used options and get the best deals for NEW 9" Ford Gears - Ring & Pinion - 3.91 Ratio - Rearend Axle 9 Inch 391 at the best online prices at Ford Fab rear end. Item #: F9-325-YG Yukon Gear. Gear Ratio Calculators; Setup & Torque Specs; GM RPO Codes; Carrier Breaks Additional Components For Ford 9 Inch Axles. 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. Most 9" rear differentials will be the open type. You don't need to worry about the axle flange pattern. See all stats for 1969. Rear Axles Used: Ford 7.5-Inch Axle: From the example above, you can see that the lower line shows the gear ratio, and axle diameter. Automatic Locking Differentials 1957-1983 | Ford F-100 1968-1987 | Ford F-150 1966-1986 | Ford Bronco. Particularly in the 3.0:1 to 5.0:1 range, there's The close-ratio and C4 289HP trans were mated to the 3.50, and occasionally to Many vehicles have been produced. The pinion sits alot lower on the ring gear in the 9" then a 10 bolt. the stock Ford design sliding calipers tend to wear off one side of the rotor. The Function of Ford 9 Inch Gear Ratios Chart. Get it as soon as Wed, Apr 20. 74-75 medium duty large bearing, and. The most popular rear end around is no doubt the Ford 9 inch unit, it is used by restorers, street rodders and racers alike, regardless of what brand of car the axle is going in. If not, you can use this method:Block the front wheels so that they cannot move.Jack the rear of the car up so that the rear tires are off the ground.Put the vehicle in neutral (but not running).Mark the driveshaft somewhere you can see it from a safe area.Rotate the rear wheel towards the front of the car one full rotation while watching how many times the driveshaft turns. Gear ratios depend on the year and model of the Ford vehicle. Call us at (864) 843-9275. Details: Competition Use Only Gear Sets. All the Galaxies I have seen from throughout the 1960s used the 9-inch rear, regardless of engine size. Power is transmitted from the transmission to rear end 1:1 in high gear. The material and heat treating provide excellent wear service life, but doesnt handle shock loads as well as Pro 9 in gears. GM B-Body Complete 9" Rear End Packages. Count the times your driveshaft revolves per one complete wheel revolution as you rotate the back wheel towards the cars front. Keep your front tires from moving by putting a block in front of them.Lift the trucks back end so that the back tires are above ground level.Place the vehicle in neutral while it is lifted off the ground.More items 1967 Fairlane 63.50 inches coil springs. Find your transmission and rear gear multiplier below. 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. You are correct sir, these are the standard ratios for 65-66. Gear Ratio: Year / Vehicle. The same applies to vehicles with codes containing numbers alone. Richmond Tech Support. Should be at 500 na-600-650 (turbo'd) at the rear wheels. FORD FINAL DRIVE RATIOS. For example: USD 321.93 321.93 1 321.93. 2.75 open differential. Rear Axle Gear Ratios. 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. Only 18 left in stock (more on the way). 335/18 tire. Search for: Share With Your Friends. narrowest 9" housing. 67-73 medium and big block Mustangs and Cougars. Ranger: Code: Prior to 1978 the 2.75 seems to be the common ratio, along with the 3.00. The first row will show five digits that designate the Ford part number for the axle. Ford is prominent manufacturer in car industry. 2021 Ford Bronco. 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 Most of the versailles had gear ratios for freeway cruizing but the 9's are easy to change. Back to VIN Tag Decoding: 1973-1979 Ford Truck Rear Axle Codes : Axle Code The first two digits of the axle code identify the ratio and capacity of the rear axle. 1970. $12,000.00. Nine Inch Rear Axle 66-71 Fairlanes, Torinos, Montegos, Comets, and other Ford intermediates with big blocks. This weld-on disc brake kit will go on any Ford 9" with 3.5" OD axle tubes. The gear ratio of each overdrive gear of your transmission. A Simple Formula. What does the Rear Differential do? Count the bolts on the rear-end housing, and visually identify the rear-end gasket shape; compare the gasket shape with the chart found on the Drivetrain site (see References section). A Simple Formula. If you have such an equipped Mustang and still feel that 3.73s are not enough, the next jump is up to 4.10s. Identifying Ford Vehicles Equipped with OE Traction Rear Ends. Explore all of our Ford 9 inch Third Member products online today. Is A Model Of Simplicity For Adjustment Of Pinion Depth And Setting Backlash. Calculating the torque multiplication that your axle gears provide is quite easy. The majority of Mustangs come with a ratio of 2.73-3.31 from the factory. You can also lift the rear end up, mark the rear drive shaft & also a tire & count the revolutions. Like the H in our case shows a car with a limited-slip differential. *** The other identification information, 9, as observed from the chart, indicates a 3.55 gear ratio of the Ford F-150. The aftermarket has responded to this by offering a plethora of ratios ranging from 2.91 to 6.50:1. In some cases both an 'A' and a 'B' prefix part number are shown for a particular gear set. I am looking for Ford 9" Rear end Gears with Ratio 3.50 to 3.89 in Great Condition or New. The Ford 10.25-Inch Rear Axle Replaced The Dana 70 After 1985. The Ford 9 was produced with 28 and 31 spline axles that even in their smallest form, are larger in diameter than those in the 10-bolt Chevrolet rear axle. 1,795. Ford 7.5s and 8.8s have 10 bolts, the 10.25 has 12 and all Dana units have 10 bolts, but each has a different gasket shape. The last Ford 9-inch rear to be installed in a passenger car was 1980. People have been climbing around scrap yards How to use the chart. The very rare optional 6 cylinder rear was the 3.50. For example: The tag will say: 350 for 3.50:1 ring and pinion gear ratio. I'm almost 100% sure it was a 9 inch rear end and not the double braced 9-3/8 gear piece. Selecting the Best Gear Ratio One of the primary reasons why the 9" Ford rear end has come to dominate drag racing is the ease with which thirdmembers with various ring & pinion gear ratios can be installed. The chart below may be of some help in deciding what rear end ratio is right for you. Listed are the expected RPM's at 60 MPH with a given rear end ratio and tire height. This chart applies to all Ford non-overdirve transmissions, manual and automatic. Power is transmitted from the transmission to rear end 1:1 in high gear. Ratio & type. In todays high-performance applications, however, theres rarely a single Ford-built part in a 9-inch rear end. The only ratios available from the factory were 2.83:1, 3.20:1 or 3.50:1 If the tag is still on the back of it, it should say WCY- something. The car was a mid '70's Lincoln Mark VII I think. 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. There are two rows of numbers on the tag. Ford 9 inch Gears. The same applies to vehicles with codes containing numbers alone. To recognize a Locking 9" differential, look for a metal tag on one of the bolts that holds the center section to the housing. 9 Inch Ford rear differential. Description: Yukon Ring and Pinion sets give you the confidence of knowing you're running gears designed for the harshest of For instance, if both the engine and transmission deliver up to 100 ft./lbs. The 9&Quot; Ford Rear. 57.25 inches. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. The other identification information, 9, as observed from the chart, indicates a 3.55 gear ratio of the Ford F-150. Applications: Ford Used The Dana 70 And Dana 70HD Axles In F-350 Trucks Up To 1985.5. The original tire size is 30" and the original gear ratio is 3.91. Any Ford 9" carrier will fit, as long as it has a fill plug on the side. The 351 and 400 engined cars that I have seen used the other rear axle, none the nine inch. Axles Tubes Are 4-Inches. Ford Rear End Product Details - More about how our rear ends are built. Gear Ratios - RPM from Speed, Rear & Trans. 1967 Cougar 60 inches. Original ratios are 2.47, 2.50, 2.75 or 3.0 with the 2.50 being the most common. $107.09 - $587.99 Shop Now. Original gear ratios range between 2.79:1 and 5.43:1, and aftermarket replacement gears are available for many ratios as well. Code. 1968. Show some Mustangs from 1969. Chrysler Dodge differential gasket patterns can help you indentiy what rear end you have. The pinion would just barely fit through the hole in the case. The pinion gear measures 1.626 inches in diameter with a 28-spline axle shaft through 2001, and 31 splines beginning in 2002. GM F-Body Complete 9" Rear End Packages. Great Choice High-Horsepower, High-Impact Racing Applications. Width: all measurements are flange to flange 67-71 Comet, Cougar, Mustang, Fairlane = 59.25 inches 65-66 Mustang = 57.25 inches 67-70 Mustang = 59.25 inches The heat treated aluminum alloy well suited to absorb high impact shock loads. If there is an "L" in between, you should have a locking or limited slip Let's see, I have had 2.79. This chart applies to all Ford non-overdirve transmissions, manual and automatic. GM Truck Complete Rear End Packages. So from that example, we can see that the tag above is a 7.5 inch axle with 3.73 gears. Our expert customer support technicians are available Monday through Friday from 7:00 a.m. until 7:00 p.m., CST. 76-77 large bearing. There are a few exceptions that you will see in the Ford Axle code chart. 1972 Ford LTD 2. The Final Drive Ratio shows you how many times the engine turns for one complete turn of the tires. If for example you have a rear gear ratio of 3.73:1, this simply means that the drive shaft (which is connected directly to the pinion gear) is going to rotate 3.73 times to the wheels turning one, full rotation. 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. Find your transmission and rear gear multiplier below. 1. NOTE: These width dimensions were measured with 1940 style brakes. 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. More Buying Choices. This means the supply of Ford-produced 9-inch rear ends, from the wrecking yards, has been drying up for 28 years now. 0. The chart consists of several columns that represents ratio, ring teeth, common factor,