Gm 10 Bolt Gear Ratio Identification

The 3-67 means it was manufactured in March or 1967. Filthy Motorsports carries a wide range of parts, gears, and upgrades for the GM 8. 225S10 differential replaces the conventional differential internals used in certain 1973 - present GM axles. 8 Inch Rearend; How To Rebuild a GM 10 Bolt Chevy 8. Borg Warner Second Design ST-10 4-Speed Info History Based on fact, rumors, internet stories, and my vague memory The history of the ST-10 transmission begins with the Borg Warner T-85 3-speed which was the basis for the Borg Warner T-10 4-speed first used by GM in 1957. 5" 10 Bolt 4. Synonymous with performance across applications, the Dana 44™ is available for both front and rear. See how to assemeble this beast of a 14-bolt AAM-1150 axle in this month's issue of Diesel. Diff Ratio ID All 4x4 We turned the tire about 3 times for one turn of the ring gear. Visit Quirk Chevrolet Manchester in Manchester NH serving Manchester, Nashua and Derry #KL7CJNSB7LB029801. In the off-road world, you'll. The bearing set is the same since around the mid 1980's when GM increased the pinion bearing size. 2-inch rear. Its quite possible that i may have to replace my rear end gear set. Whether it's on the street, off-road, or at the track; Yukon ring & pinion sets deliver unrivaled performance. Checking to see if your Chevrolet vehicle has a 10-bolt differential will allow you to better prepare when repairing or performing maintenance to your front or rear drive axles. The new corporate 10-bolt started with a medium, 8. The basic rule of thumb is that a 2-series differential will only work with gear ratios in the 2 series, as in 2. Currie 12-bolt Rearends for 64-72 A-body vehicles are complete, ready to bolt-in assemblies, with a choice of popular differential type, gear ratio and brake options, making it easy to customize the package to meet almost any need. CID to Liter Conversion. 30 Motive Gear Ring and Pinion Gear Set w/ Install Kit. Dana Model 60, 70 & 80 Axles are not internally identical. 2 inline six. 5 is to remove the cover and inspect the ring gear bolts. 27-6550 is the quick ration gear, and 27-6530 is the standard ratio gear for the Camaro applications from 1980-1992. Uses 28 spline c clip axles. The superior quality of these gear sets is the result of years of racing development, outstanding design, and state-of-the-art manufacturing methods. Model Year Engine Trans Type. 14 Bolt GM Axle: 73 - 87 Chevy Truck Specs. The actual gear ratios for each of these versions is listed in the Performance American Style factory publication. And gear oil will work. 06 Brevini Riduttori Swing Gear W Motor Sdu31hprm130-cf Buy Now. GM CORPORATE IO-BOLT The GM 10-bolt is named for the number of bolts on the cover; ring gear diameter is 7 1/2 inches. Lets look at these two perfectly rount gears. The 10-41 means it has 10 teeth on the pinion gear, and 41 teeth on the ring gear. Commonly 7 or 8. Welcome to Torsen ®. It will read slow by about 10%. Home » Shop Drag Racing Parts » Ring and Pinion Gear Sets » GM Install Kits » Complete Installation Kit For Chevy 8. I am looking to change the rear diff cover to an aluminum or chrome cover. Welcome to the GM-Trucks. 5″ 10-bolt rear differential, the parts and processes described herein cover most differential housings. Carrier Casting Numbers. The axletubes and. Last 3 part numbers indicate gear ratio. 5″ Rear-end; How To Install Ring and Pinion Gears in a Ford 8. The 10-bolt differential fits all passenger cars. 5″ Rear End February 20, 2019 Roadkill Customs How To & DIY Tinman 2 Kustoms shows how to rebuild a 10 bolt Chevy 8. 5" 14 bolt axle is also used in 3rd Generation Dodge Ram 2500 and 3500 trucks. 5; GM 12 Bolt 8. Identified by casting #’s, physical characteristics/appearance, cover bolts (10 or 12) & code stamped in axle tube. By changing the ratio of just the head set (input shaft and front of the countergear) you can change the overall ratio. Gm 5 Speed Manual Transmission Gear Ratios >>>CLICK HERE<<< 3 GM transmissions, including Muncie M20, M21, M22, 4 Automatic transmissions 4. GM CORPORATE 10-BOLT The GM 10-bolt is named for the number of bolts on the cover; ring gear diameter is 7 1/2 inches. Jeep Accessories, Jeep Parts -JeepHut Offroad is your destination for Jeep parts, Jeep accessories, Jeep repair and Jeep customization for all of your Jeep, truck four wheel drive and offroad needs. 2 Chevy Rear. The semi floater is in fact a 14 bolt, but it has a 9. 2 Bellhousing bolt pattern and The first T-5 five speed was found in the 1981 AMC. In Chevy Differentials: How to Rebuild the 10- and 12-Bolt, author Jefferson Bryant walks you through the entire process of disassembling, evaluating, and rebuilding the perfect differential for your GM application. The Ford pattern was also used on AMC and Nissan. 2 ring and pinion. This subject comes up often enough I thought I'd post this service bulletin There's a lot of conflicting info about whether or not to use a posi or limited-slip additive to the gear oil when filling a G80 (Eaton Gov-Loc) differential in a GM truck. 5" ring gear. The round 10-bolt cover with a bulge for the ring gear identifies this axle assembly as an 8. Everything else is going to require new spring perches to be welded to the housing. Chevrolet used the 10-bolt on passenger cars and Corvettes for a long time, so, consequently, different versions and sizes are available. 2, and if it takes a 9/16 wrench, it's the 8. Place a piece of tape on the end of the input shaft and mark the 12 o'clock position. 2 gear with the robust Buick 8. There is only one "bolt in" axle replacement for a 55-57 Chevy. If your looking for more power or performance, you would switch to a lower ratio. The Bill of Material (BOM) number is used to identify Dana differentials. ***Call Zumbrota Bearing and Gear at 1-800-658-2537 ext 125 for customer service, availability and technical assistance***. 2" ring gear from 1964 to early 1972. 3 ways to find rear end gear ratios. Chevrolet Rear Axle Code Identification and Decoding from thecamaro. We have the largest selection of Chevrolet 1500 Pickup Rear Axle Assembly parts at discount prices. 10 & Down Case: $231. The gear ratio most interesting to 4x4 truck owners is the ratio between the driveshaft and axels. A bolt-in off-road axle solution for the Jeep JK Wrangler that features in-demand upgrades built right in. 625 10 Bolt. 260 / 289 Cobra Borg Warner T10 Identification, Gear Ratios & Tooth Counts Several Borg Warner T10s were produced for use in Ford vehicles, with different main case and tail housing configurations depending on the vehicle application and bell housing bolt patterns. 2 inline six. 5 inch bolt pattern. GM CORPORATE IO-BOLT The GM 10-bolt is named for the number of bolts on the cover; ring gear diameter is 7 1/2 inches. Since both the 8. 14 Bolt GM Axle: 73 - 87 Chevy Truck Specs. Gear ratio on 10 bolt 1994 Chevy Suburban The rear gear ratio of a 1989 Chevy Cheyenne truck is between 2. We have the largest selection of Chevrolet 1500 Pickup Rear Axle Assembly parts at discount prices. How do you find gear ratio on a gm 10 bolt rpo said its a gu6 but grea part is 2 gm 1235128 12 41 Supply the vehicle identification number to the nearest dealer and he/she can tell you what. 55 posi gear ratio. 5" Series Axle with 10 Bolt 1990, ECTED Max™ Rear Limited Slip Differential by Auburn Gear®. In 1971, GM instituted a standardized "corporate" rear axle. There has been talk of a few lower ratios being made, but I've never found them after extensive searches and phone calls. If your looking for more power or performance, you would switch to a lower ratio. Choosing the correct gear ratio is critical to maximizing performance, efficiency and drivability for any kind of vehicle operating under any conditions. Advanced Timing Marks for your Balancer. So i recently picked up a 77 chevy 3/4 ton 4x4 and was wondering how to tell the gear ratio. Check out Part 4 of our Doomsday Diesel build as we rebuild an 01 to 10 GM ear axle to last forever. 10 : 1 ratio. Looking in the chart, I find the closest match (using a small drive gear and tailhousing) is an 8-tooth tailshaft gear and a 24-tooth speedometer drive gear. 2 Bellhousing bolt pattern and The first T-5 five speed was found in the 1981 AMC. Mine was 2. 5" Diameter Ring Gear • 1. 6 lug 4x4 rearend from a 80 model Chevy truck not sure of gear ratio. (4WD trucks with a divorced transfer case, however, also have the square tail-housing bolt pattern. 5" ring gear was used in Chevelles. I just wanted to stop by and let you know that GM Customer Care is here on the forum and are more then happy to answers questions just like your question regarding gear ratio. Typically, 10-bolt differentials are specific to a series of gears. With several distributions most gears and parts are only a day or two away. Chevrolet Transmission Dimensions Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. 625 inch ring gear, 26 spline axle 1990 to 1992: 7. You may have noticed other sellers using a similar name offering similar products. I know the chevy 10 bolt 8. Common conventional rearends are anything from a GM 10-bolt to a Dana rearend. chuckwrd, I knew that your awesome fellow forum members would be able to provide you with an answer to your question. Rear spring mounting pads differed in that 1964-66 rear ends used a flat pad with a hole drilled in the center. GM Corporate 8. A] The Ford's bolt-in third member (circle) that holds the gears and diff combine with bolt-in axles to allow gear changes at the track in as little as 40 minutes. GM 10 Bolt 8. Visit Quirk Chevrolet Manchester in Manchester NH serving Manchester, Nashua and Derry #KL7CJNSB7LB029801. Ring Gear Diameter: 8. A/X/Z Plan pricing, including A/X/Z Plan option pricing, is exclusively for eligible Ford Motor Company employees, friends and family members of eligible employees, and Ford Motor Company eligible partners. Visit Quirk Chevrolet Manchester in Manchester NH serving Manchester, Nashua and Derry #3GNAXSEVXLS575436. GM RPO Axle Codes. do NOT contact me with unsolicited services or offers. And gear oil will work. 10 gm gears not installed $650. KF meaning 3. 1979 Nova. 1971 Chevelle 10 Bolt Posi 2. Stock gears are suitable for just about everything other than full-power blasts down the dragstrip … or for rock crawlers. A Chevy 3/4 ton pick-up may have a 14 bolt semi-float rear axle or a 14 bolt full-floating axle. The 4 speed toploader is one of the toughest manual transmissions ever built. Well ik its 10 bolt and its 32 spline. The close ratio version is about 4:1. 56 gear 33 spline Moser axles be an OEM GM (Pontiac or Chevy) B/W. The new corporate 10-bolt started with a medium, 8. In the stock Ponitac world 3. Chevy truck 12 bolt. Axle Model and get Free Shipping on Orders Over $99 at Summit Racing!. Rear spring mounting pads differed in that 1964-66 rear ends used a flat pad with a hole drilled in the center. The 1970 12 bolt version will bolt into any second generation Camaro and quite often is done so in high power applications. do NOT contact me with unsolicited services or offers. 14 Bolt GM Axle: 73 - 87 Chevy Truck Specs. WE REBUILD TO YOUR SPEC'S. here is a close-up of a 14 bolt gm rear end. 5″ rear axle in the bagged C10 using Yukon Gear & Axle components…. 10 Bolt Rear Axle Oil Change w/ Factory Limited Slip. ***Call Zumbrota Bearing and Gear at 1-800-658-2537 ext 125 for customer service, availability and technical assistance***. Here is a 12 bolt 1969 Chevelle posi trac rear end with 3:55 gear ratio. If your classic muscle car already has one of the Buick or Pontiac 8. 73 and changed it to 3. 23's She has 4. the pinion. 40 ratio and put that rear end. 6" 10 Bolt 3. Rear spring mounting pads differed in that 1964-66 rear ends used a flat pad with a hole drilled in the center. Borg Warner 7. We have inspected the ring and pinion so as to ensure minimal ware and tare on the differentials that we sell. 73:1 ring gear fits the GM 12-bolt passenger car carrier. There has been talk of a few lower ratios being made, but I've never found them after extensive searches and phone calls. 00 Gear Ratio changes from 513 & Up - Installed $395. Bright Idea, Sep 24, 2019. Our online forum helps enthusiasts get the most out of their vehicle and share the experiance of pickup ownership. Its claim to fame is that it replaced the Dana 44 in '77 when GM decided to use its. The ratios are correct, but use pan gasket ID to determine whether its a 9-bolt or 10-bolt axle. GM 10 Bolt 7. A Chevy 1/2 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. To find the axle gear ratio of any GM vehicle, locate the RPO sticker (typically located in the glove box) and write down any codes starting with F, G, or H. 10:1 - Tooth Combination 41,10 Ratio 4. I have a 68 bird with a basically bone stock drivetrain and looking to do some upgrades to the rearend. Mine shows the code as the same for all the years mentioned. Thanks for looking. 55:1 is a really deep gear set FWIW, this rear still has the 2 series carrier but is packing a 4. 2-inch rear. 2" ring gear from 1964 to early 1972. The ratios are correct, but use pan gasket ID to determine whether its a 9-bolt or 10-bolt axle. 5″ Rear End February 20, 2019 Roadkill Customs How To & DIY Tinman 2 Kustoms shows how to rebuild a 10 bolt Chevy 8. Axles are drilled for the Chevy 5 on 4-3/4 bolt pattern. Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled "Service Parts Identification" inside. Filthy Motorsports carries a wide range of parts, gears, and upgrades for the GM 8. org Ford rear ends sometimes had tags under one of the carrier bolts that had the ratio and a code for being a LSD or not. 10 gear for a 12-bolt Chevy housing that will mount to a 4. New! Front yokes now available. Differential Identification. I Intend to use this article to gather all the info and pics I can find on the venerable GM "corporate" 14 Bolt (14b) full-floating rear axle, also referred to as the 10. 56 and higher gears (numerically lower) such as 2. 5″ Rear-end; How To Install Ring and Pinion Gears in a Ford 8. 29 of 57 6T70/75. Many of these differentials are now more than 40 years old and are due for an overhaul. As fo the gear ratios, don’t forget the GM TH200-4R, which used a Simpson gearset, had basically the same ratio spead as an 4R70W. 5 Inch Ring Gear, Semi-Float Axles, Ratio Option GT5, Without Posi Traction * Stocked in outlying warehouse--shipping delayed up to 4 business days 4 Day Delay ZUMBROTA RAA4351515C. Typically, 10-bolt differentials are specific to a series of gears. I have a 10-bolt chevy rear end and I found this code stamped in the axle tube on passenger side: XPK K211 1. , 1/4" wall), custom alloy axles (30, 33, or 35 spline. Mine shows the code as the same for all the years mentioned. Then, find those codes in the table below. 10 ratio and need better fuel mileage you would switch to a 3. Carrier Casting Numbers. Quality & Customer Service Distributor Support Warranty Info About Yukon Calculators. 2 CHEVY 10-BOLT Ring and Pinions We offer your choice of Ring and Pinions for your 8. 5" 14 bolt axle is also used in 3rd Generation Dodge Ram 2500 and 3500 trucks. See onstar. 10 but i could be wrong. Well ik its 10 bolt and its 32 spline. For cover gasket see 8-1/2" G. Rocker Arm Comp Shaft Mount 1. I have a 68 bird with a basically bone stock drivetrain and looking to do some upgrades to the rearend. The GM 10 Bolt front axle was used on Chevy and GMC 1/2 ton and 3/4 ton 4x4 pickups from 1977 to 1987 and on Blazer/Jimmy, and Suburban SUVs from 1977 through 1991. The OEM Carrier 2 gears fit 3. from what little i can tell just by looking, and after extensive research, i believe it to be an 8. While this article focuses specifically on the GM 8. Divide the ring gear teeth number by the number of teeth on the pinion. Mine was 2. 1971 Chevelle 10 Bolt Posi 2. 10 bolt street gears are designed to withstand the rigors of everyday driving, as well as a weekend at the track. Our user id is: skipwhite, and our store name is whiteperformance1. Please select a rear end that matches your vehicle below. WE REBUILD TO YOUR SPEC'S. 4 Speed Toploader ID Chart 3 Speed Toploader ID Chart View of a Toploader Torque Specs and Gear Ratios Oiling Specifications rail detent bolt : 10-15:. A Chevy 1/2 ton pick-up may have a Chevy 10 bolt rear axle or a 12 bolt rear axle. 88 I had to go with series 3 carrier, series 1 being 4. 5" GM 10 bolt- stock specs: 8. Is there a place I can look to find the gear ratio for ther rear end of my 1964 c10 stepside truck? It has a 12 bolt rear end in it. A Chevy 3/4 ton pick-up may have a 14 bolt semi-float rear axle or a 14 bolt full-floating axle. I have a 10 bolt posi rear out of a 78 Trans Am. 5" - and the differences in setup for each, including semi-float, full-float. Think rear is posi. 2 MOPAR automatic 5. 1977 and 1978 Camaro, Firebird, and Nova. This 1955-1956-1957-1958-1959-1960-1961-1962-1963-1964 Chevrolet 3. Count the number of bolts that secure the differential cover. Find great deals on eBay for gm 10 bolt 8. Variations of this can be found in the rear of GM S-trucks and some ISUZUS, and in the front of S- trucks. Individual gear ratio identification codes can be found for their respective years on this website. Here are two nine inch ring gears side by side, one from a 3. How do you ID the gear ratio of a 10-bolt rear end and find out if it's posi-traction? Most all rear ends have a code stamped on the axle housing. 73 and auburn posi. Rear spring mounting pads differed in that 1964-66 rear ends used a flat pad with a hole drilled in the center. This unit is backed with our 3 year unlimited mileage parts & labor nationwide warranty. Out of a 1987. 8 is similar to the 12-bolt, it isn't identical. A Series 2 carrier will work with 2. Using only authentic OE approved and tested parts, Power to Deliver components will provide the proper fit and function required to avoid noise, vibration and harshness that leads to customer satisfaction. A] The Ford’s bolt-in third member (circle) that holds the gears and diff combine with bolt-in axles to allow gear changes at the track in as little as 40 minutes. The SM465 enjoys a very low compound gear at 6. Muncie (General Motors) 4-speed longitudinal transmissions were developed in three distinct models – The Muncie M20 wide ratio manual transmission, the Muncie M21 close ratio manual transmission and the Muncie M22 heavy-duty close ratio manual transmission. The 3-67 means it was manufactured in March or 1967. 2 is almost as stout as the 8. Find Ring and Pinion Gears with 10 Ring Gear Bolts and GM 8. The OEM Carrier 2 gears fit 3. 2 ring and pinion. Richmond Gear is the leading manufacturer of professional quality, high performance ring and pinion sets. 08 rear end center section is an original used two-pinion type with cast arma-steel housing. also, how do you check to see if you have a locker/limited slip/posi? sorry for such beginner questions but id like to learn more before i start handing out cash for other parts. Mine was 2. Those that came with 20:1 ratios, turn a full 4 to 4. Shims, Crush Sleeve, Pinion Nut & Gasket For side shims, pinion shims and crush sleeve, see 7-1/2” G. 55 posi gear ratio. 5" -1968-70 Oldsmobile 12-Bolt Cover/10-Bolt Gear GM 8. 5" Ring Gear -14 Bolt (Includes Gasket & Hardware) This is a finned polished aluminum GM 10 1/2 inch ring gear differential cover for a corporate 14 Bolt Rear, includes gasket and hardware. RANDYS carries GM differentials from the small 6. This input is transmitted to pinion gear P2/P3 then to pinion gear P1 (auxiliary gear). 1955-1964 Chevy 3. The rear gear set in the 10. The 1970 12 bolt version will bolt into any second generation Camaro and quite often is done so in high power applications. A Chevy 3/4 ton pick-up may have a 14 bolt semi-float rear axle or a 14 bolt full-floating axle. do NOT contact me with unsolicited services or offers. About Torsen ®. GM CORPORATE IO-BOLT This 10-bolt, with a larger 8 1/2-inch ring gear diameter, replaced the Dana 44. 5" 14 bolt axle continues in production today on GMC Savanna and Chevrolet Express vans. We have the largest selection of Chevrolet 1500 Pickup Rear Axle Assembly parts at discount prices. The Auburn unit is a cone style posi instead of a clutch style posi and as a result is not a rebuildable unit. There are many other "10 bolt" axle types, even the original is a "10 bolt". RANDYS carries GM differentials from the small 6. Quality & Customer Service Distributor Support Warranty Info About Yukon Calculators. This code is marked with RED in the location photo above. Engine Type/Size. Typically, 10-bolt differentials are specific to a series of gears. (441) 7 bolt side cover ford 3+1 overdrive ford/mercury (435) borg-warner torque tube tailshaft,. Eaton produces a limited-slip differential unit for 3. Read the tech article on a 10-Bolt Identification Guide, brought to you by the experts at Chevy High Performance Magazine. Some differential experts tell you that the Blue Oval engineers copied the 12-bolt design when they came up with the 8. A lower ratio will give a higher top end. Axle Model and get Free Shipping on Orders Over $99 at Summit Racing!. There are no ID tags anywhere. According to Nasty Z28, the GM/Chevrolet 12-bolt rear end was manufactured from 1965 through 1971. We have the largest selection of Chevrolet Tahoe Rear Axle Assembly parts at discount prices. To find the ratio of any gear combination; count the number of teeth on the pinion gear, and divide that number into the number of teeth on the ring gear, thus 41 divided by 10 = 4. Unfortunately, what gear ratio you should go with isn’t always so clear. 2" '55-'64 Limited Slip Differential Package deals available featuring OE gear sets from AAM American Axle and Dana Spicer as well as aftermarket sets from Dana SVL and Yukon brand ring and pinion gear sets. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse. 5" 10-Bolt Ring & Pinion Gears - 3. chuckwrd, I knew that your awesome fellow forum members would be able to provide you with an answer to your question. (441) 7 bolt side cover ford 3+1 overdrive ford/mercury (435) borg-warner torque tube tailshaft,. New 2019 Chevrolet Trax LT 4D Sport Utility for sale - only $16,666. pinion shaft, 28 spline axles. com or dealer for details. 5" 10 bolt is probably the strongest of the 10 bolt GM's and not much less than the 12 bolt. 3L with 30 Spline with 2. 2" BOP axle including ring and pinion sets, rebuilt kits and bearings, differential covers, upgraded axle shafts, heavy duty u-joints, and more. Just make sure that if it has a G80 you don't use limited slip friction modifiers because the clutches are designed to work without it, and will actually slip with it. Typically, 10-bolt differentials are specific to a series of gears. 11 was the o/d gear. It wasn't until late 1972 that the 10 bolt 8. The result is Chevy GM 12 Bolt TRUCK rear end ring and pinion gears that deliver performance standards set by DANA, one of the world's most trusted supplier of driveline parts. Items may be different than pictured. Each and every gear set is lapped to its mating gear, with all set-up information etched into the gears with each gear set serial numbered. Select from a broad range of gear ratios, differential types and other options that go beyond what’s offered in our standard Crate Rearends. Concerns & Repair Techniques. Advanced Timing Marks for your Balancer. The 1970 12 bolt version will bolt into any second generation Camaro and quite often is done so in high power applications. 2-inch or the 12-bolt 8. 5" 10 bolt is probably the strongest of the 10 bolt GM's and not much less than the 12 bolt. 2" - 10 bolt cover with 8. 3 ways to find rear end gear ratios. After the. Gear Ratios: Current production Dodge NV4500 and GM NV4500 share the same gear ratios. The GM 10-Bolt semi-floating rear axle has been in use for over 40 years. The said, the AOD/AODE didn’t have the wide spread, with a 2. I'm running a ring gear spacer in a 10 bolt for my Austin with a 327, and it seems to be working just fine. Honestly, the abuse those things survive is amazing. Well ik its 10 bolt and its 32 spline. 5" 10 bolt is probably the strongest of the 10 bolt GM's and not much less than the 12 bolt. In the stock Ponitac world 3. 2 is garbage, but I've heard the BOP 8. 10/12/14 bolt, Dana, ring gear size, etc. To find the ratio of any gear combination; count the number of teeth on the pinion gear, and divide that number into the number of teeth on the ring gear, thus 41 divided by 10 = 4. Use these gear ratio calculators to custom tailor Richmond Gear products to your vehicle. While this article focuses specifically on the GM 8. 1955-1964 Chevy 3. Variations of this can be found in the rear of GM S-trucks and some ISUZUS, and in the front of S- trucks. 56 and higher gears ("higher" gears have lower numbers, like 2. 5" gears, ring and pinions, ring and pinion gear sets, master install kits, pinion kits, mini install kits, axles, ujoints, bearings, air lockers, lockers, triple drilled flange, diff housings, solid spacers, flanges and other GM 10 Bolt 8. It will read slow by about 10%. Gear ratio calculator for your Chevrolet.