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: carriers, while sometime in the early 70's the switch was made to mostly It has been said that it has a higher most abundant. Traditional BOM's are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. Cost and complexity are two. Strange Engineerings heavy-duty lines of S-Series transmission and pinion yokes were designed by Strange and are manufactured from USA made high tensile strength nodular iron castings. 289 Hipo cars.The N cases went with 31 spline centers and are for rugged The rear-end housing has a vast amount of ford 9-inch gear ratios available. for the 1971-1973 Mustangs - cars with 351 engines and up receiving the 9-inch thanks. 9-inch (cars) have a 5-on-5 bolt circle and the axles cannot be shortened. 1967-1973 Mustang axles can be identified by wheel flange: Oval hole = 28 splines; Two large holes and counter-sunk center = 31 splines. If an L is included, it was equipped with a limited-slip differential or Traction- Lok. Ford differential tags are very . Of course, if your budget allows, you can purchase an aftermarket iron case that is stronger than any factory case. Snap On vs Daytona, Pittsburgh, ESCO, Husky, More. The heat treated aluminum alloy well suited to absorb high impact shock loads. Your email address will not be published. The center section is the differential assembly. If the socket fits (as shown in our photo below) it is a Ford 8-inch housing. Original ratios are 2.47, 2.50, 2.75 or 3.0 with the 2.50 being the most common. The engines flexplate is a critical part to transferring power to your drivetrain. Now you can see the C4AW-4025-B part number on the lower left unit, which verifies it as a nodular unit. GM B-Body Complete 9" Rear End Packages. The 8.5- and 8.8-inch gears have even found themselves in the independent-carrier-style axles. truck housings received even beefier center carrier housings and tubes, Any of the W-series cases do have a fill plug machined in them. The Ford 9-inch has a reputation as a durable axle that can transmit enormous torque, and this is rightfully deserved. only need to carry one spare should you choose to. The material and heat treating provide excellent wear service life, but doesn't handle shock loads as well as Pro 9 in gears. 13 lovely chevy 10 bolt rear end gear ratio chart. Besides the styling of the Ford Edsel, even the axle shafts were very unusual. - as in the Mustang line, most however never received a factory 9-inch). Thanks. There were many instances of cuts and scratches from the thin steel tags sticking up on the axles. Discount is automatically applied. 70's. around 64-65 I believe.They are most often found behind the later 428CJ (narrowest 9-inch housing), 1966-1977 Bronco 58 inches but has 5-on-5 1/2 inch 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 . if one wants to use a 31-spline truck carrier in a car. Since 2011, V6 and V8 Mustangs have used Ford's 8.8" rear end, but before that many used a 7.5" rear. inch diameter all the way to the backing plate, coil housings have upper by Ford exist in the size of the outer axle bearings in the housings and carriers both, as well as with the spline count on the axle shafts. Ford 9.5 PRO GEAR* *PRO GEAR RATIO PART NO. It can also help in identifying the axle ratio of your particular vehicle. Here is an example to help you through. The answer lies in several of the Ford 9-inchs design aspects, starting with the Ford 9 inch gears. The first table is the code and gear ratio. for 1967-1970 (same as 1966-1969 Fairlane, Torino, Comet & Cyclone non Keep in The narrowest production 9-inch axle is 56.375 inches. A The close-ratio and C4 289HP trans were mated to the 3.50, and occasionally to the 3.89 and 4.11. There are 8.5-inch gears installed in these housings for lowerpower vehicle applications. but the link i was refering to listed codes by year and model. This was offered on the 1960 F-100 truck. It is an 8 inch rear axel so many parts interchange with many other years Fords and Mercury's using an 8 inch axel. Hot rodders and drag racers use 9 Ford rear-ends and their aftermarket descendants in just about everything not just Ford cars and trucks. 3. These third members are the strongest of the production cases and the most desired. 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. common carrier housing found is the C7AW-E. also received the larger axle bearings housings. 31-spline axles and carriers for most trucks. These first became available on the 1964 Galaxies with the 427-ci engine and were found on many higher horsepower cars and trucks. The format has changed over the years but mostly follow this sequence:. This format is also applicableto casting date codes. 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). Only the N-series cases are made out of the stronger, more desirable, nodular iron. Width: all measurements are flange to flange. wheel drives) right up until about 1982, these housings are by far the It has more ground clearance than a Dana 60. Mustangs and Fairlanes. GM G-body 78-87 Complete 9" Rear End Package. 66-75 small bearing, 2. I have included the narrow 8-inch axles for reference. *** SELECT GEAR RATIO FOR PRICE *** Categories. Select the Towing Guide for your vehicle's model year. The Ford version uses larger axle shafts and different lube flow strategy. The 9-inch ring and pinion is front-loaded into the rear end housing. 1-wire alternators are perfect for engine swaps or just keeping things simple for your project. On this particular third member, the original copper washers that were under the factory fasteners have been discarded as well. Ford improved tooth contact of the Ford 9 inch gears by locating its pinion gear lower on the ring gear. If measuring the drum-to-drum distance, add .200-inch to these values. Our Mopar flexplate buyers guide will help. diameter bolt circle, 1967-1973 Torinos, Rancheros, Fairlanes 59.25 inches or JavaScript is disabled. 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 This particular pinion cartridge is well reinforced and much stronger than the stock production cartridge. 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. Call us at (864) 843-9275. When narrowing a Ford 9 inch rear end, the first step is determining the overall length you need. Then take that answer and divide it by 100% and then multiply it by itself to find out what gears/axles you need to run to achieve the desired tire size. Check it out. Boss 429s, 427s, 428 CJ/SCJ and the 429 cars which received the The cast-iron third member is installed from the front of the housing. Standard Ford 9 inch gear sets are primarily used in street applications. This combined with easy assembly makes it popular for fine-tuning a rear gear for any particular application. These labels have a specific code that is similar to the axle code on the 9-inch axles. 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. Now that you have identified the axle code, let us know the axle ratio. 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. These have a C4AW-4025-B casting part number next to the adjuster nut. Original gear ratios range between 2.79:1 and 5.43:1, and aftermarket replacement gears are available for many ratios as well. The Ford 9 inch rear end is one of the most popular axles in automotive history. The entire S550 Mustang generation has had 4, due in part to the limited-slip differential option. 1967-1973 Mustang/Cougar - light duty, thinnest housing material, small axle Start by opening the left drivers front door. 74-75 medium duty large bearing, and. 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. 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. Performance Front & Rearends GM Vehicles Axles were similar to the Ford 9-inch 28-spline units. Enter the required Overall Width, Pinion Offset (location), Brake Space and Drum/Rotor thickness to find axle length and housing width. 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). 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. This is a relatively common issue on these housings. Details: Motive Gear . 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. The unit on the top left seems to be nodular iron but requires a little more investigation to verify. medianet_versionId = "3111299"; The Ford 9-inch can be found under 1974-1986 F-150s and 1978-1986 Broncos. Are reviews modified or monitored before being published? Where A=the first number (static reduction), Bi=Gear diameter, Bf=Ring Gear diameter, Cf= (Crown Wheel dia.) Ford 8 Ford 9: CLICK FOR MORE INFO. All the Galaxies I have seen from throughout the 1960s Read more: CV Axle Boot: Overview, Signs, And Replacement. So dont be surprised that most of these axles leak from the welds. This bearing is one of the reasons that the 9-inch has the reputation for being bulletproof. Many racers carry an extra carrier assembly for their 9 inch third member with a different rear end ratio so they can try different combinations on the same day while at the track. - as in the Mustang line, most however never received a factory 9-inch). Over several generations of small block Chevy (and big block Chevy) engines there have been several changes that dictate what flexplate works with them. the best. Ford used weakest and had abrupt ending but welded carrier centers to tubes and a All of the 8-inch case nuts can be accessed with a socket. 54" The Ford 9 inch rear end is one of the most popular axles in automotive history. Call 800.979.0122, 7am-10pm, everyday. is the strongest factory case made BY FORD!!! Ranger Station, Submit pattern (same as older Jeep), a 65-inch width at the wheel mounting surfaces, larger wheel bearing housings. other Ford Ranger enthusiasts. Filed Under: Ford Tech Tips, Rebuild Ford Differentials, The Best Ford Tech Articles, 2023 DiY Ford. I'm not responsible for incorrect information, Width: all measurements are flange to flange, Ford Rear Axle Assembly Identification - Page 01 - FORDification.com. If you know your axle tag number, simply go to the second table. It has been said that it has a higher The repair process requires the axle to be disassembled and thoroughly cleaned. This not easily accomplished with integral carrier axles, like the GM 10- and 12-bolt. Chevy differentials: how to rebuild the 10- and 12 . Rear ends with 3.42 gears usually come in 8.2 and 8.6-inch units, Rear ends with 3.73 gears come in 8.5 8.6-inch units Best Gear Ratio For Your GM 10 Bolt. 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? Spring perches must be cut and re-welded in order These variations include different-size drum brakes, disc brakes, and wheel hub arrangements. 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.. 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. This larger offset (hypoid distance) between ring-gear . This is a typical axle tag that has been removed from the third member. 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. Axle to the housing, the small bearing housings use 9/16" socket size nuts Axle Ratio : Axle Ratio : Diesel: 5.13: 4.10: 3.55: Gas: 4.10: 3.55 : Trans Ratio: . Ironically, 8.0-inch independent carriers were made in cast iron. We have a large selection of gear sets in stock and can recommend the correct . trucks varied more, early half ton trucks got the 28-spline axles and the few cars and early Broncos (and some early trucks) which received This custom axle tag was obviously hand cut as evidenced by the sharp tin-snipped-looking ends and includes DSO, for Dealer Special Order. You can use the social sharing buttons to the left, or copy and paste the website link: https://www.diyford.com/ford-axle-history-identification-ford-differentials/. control arm mount. The larger offset is better for strength and noise but worse for sliding and efficiency. always looking for good content to share with Axles Tubes Are 4-Inches. Again, the overall first-gear ratio with the TH400 and 4.10:1 rear gear would be 10.168:1. The date code on this axle tag is 7AC, and it corresponds to the 7th year, 1st month (January), and 3rd day. Written by Joe Palazzolo and Republished with Permission of CarTech Inc. 67-70 Mustang = 59.25 inches. - Rod Stroke Ratio - Stroke Size Rear Gear Requirements - Rear End Gear Ratio Needed - Speed from RPM, Rear & Trans. 31-spline carriers and "Traction Loc" style posi unit. In order to verify a nodular unit, you need to look on the inside of the casting. The most there is the letter "N" than this is a NODULAR CASE (GREAT) this Ring Gear/Pinion Gear Teeth to Gear Ratio. 1957 no dimples, flat center band up the center of the rear cover, bottom drain plug. 31-spline carriers and axle shafts. 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! You are looking for a nodular iron case, with its telltale N cast into the front or inside wall. There are quite a few companies making Ford 9-inch housings to fi t just about any muscle car out there, including non- Ford vehicles. This additional bearing and, more importantly, the necessary casting support structure is what drives the larger hypoid offset. Theres an easy way to tell an 8-inch apart from a 9-inch. housings appeared in either 1966 or 1967 with the familiar "Hump" The last set of numbers is the vehicle plant code. This is by far the most common axle used by restorers, hot rodders, customizers, and racers. 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. Notice the 8.0-inch ring gear diameter cast into the rear cover below the fill plug. Many companies, such as Currie Enterprises, Mark Williams Enterprises, Moser Engineering,and Strange Engineering, reproduce this design today. Note the weld on the top of the axle center section along with the oval-shaped dimples on the rear section. It is a column with the label AXLE on top and the Axle Code at the bottom. The original carrier is normally equipped with a CV joint flange, which can be replaced with a U . About | Contact | Terms | Privacy. 28 spline axles are tapered and cannot be shortened and re-splined. 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. The 10,41 gear ratio is also great for off-road activities . Any sufficiently advanced technology is indistinguishable from magic . Get any 3 for $25 plus shipping. This will ensure that the correct replacement parts are purchased or salvaged from a junkyard to be used in the vehicle. 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. This chart serves as a general guideline for axle fl ange-to-fl ange width based on different models and production years. if one wants to use a 31-spline truck carrier in a car. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The GoJak wheel dolly makes moving immobile vehicles around your shop easy as place, pump, and push! Generally, aftermarket shafts have to be purchased It was then replaced by the Ford 8.8 inch rear axle. The ring gear speed sensor is shown in the upper right-hand portion of the photograph. The ring and pinion are then accessed, also from the front, by removing another 10 bolts. There are also unique domestic special-option tags, which dont follow the format. some 302 4V cars with optional gear ratios). (often referred to as a "POSI") came to be a popular option and housings. The same applies to vehicles with codes containing numbers alone. Ratings and reviews are provided by customers who have either purchased a vehicle or visited a dealership for service. The Ford Mustang and Thunderbird used this style for a few model years. 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 These used what is referred to as a Ratio & type. When it comes down to actual shafts as well, since the truck lug Since the "Limited slip" or Locking rear end These used what is referred to as a 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. 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. Generally, aftermarket shafts have to be purchased Note: Rear axle ratios are available for 2008 and newer models. Axle Ratio = (RPM X Tire Size)/ (Speed (MPH) X 336) Example 4.88 = (2881 X 37)/ (65 X 336) The case Applications: Ford Used The Dana 70 And Dana 70HD Axles In F-350 Trucks Up To 1985.5. 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. WJ Handy Dad assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. This strengthens the whole rear end assembly. How to Narrow a 9 Inch Ford Rear End. by Ford exist in the size of the outer axle bearings in the housings and Our editors pick the products & services we write about. Axle Size/Strength Chart; Explained Videos; Tech Articles; 9-Inch Ford. The case in cars and trucks. The image below shows the Safety Label of a Ford Truck. C-6, three-speed, automatic. At this width, many were used in street rod applications without modifi cation. Our experts will help you find the correct ring and pinion set for your particular application. People tend to be drawn to it like a magnet. It's uncertain if this E But 10.168 / 4.70 (to determine the equivalent rear-gear ratio) equals 2.16:1, which is not realistic. While the 1350 u-joints provide enough strength to handle most demanding of applications, Strange also offers a variety of yokes with1480 u-joints for the ultimate in driveline strength and dependability. Some have only one access hole for the backing plate bolts, while others have three. Ford 9 inch axles different from other high-performance rear endsare how the ring and pinion gear is accessed. Learn how to hook up a 1-wire alternator on your vehicle. Axle code. Since the "Limited slip" or Locking rear end These axles did have metal axle tags similar to the 9-inch axles but they were slowly phased out as vehicle programs were updated. 1958-1959 two dimples on the back of housing, flat center band, some had drain holes. 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.