Chevy Truck Gear Ratio Codes

In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. Get Yours Today! We have the best products at the right price. Our stock Chevy Silverado came with the 3. If the smaller one has 10 teeth and the bigger one 20 the gear ratio between them are 20 to 10 or 2 to 1. 56, etc which is actually a HIGHER gear ratio. 73 usually if you had a 4 speed box a straight 6 cylinder it. The 1973-1980 Chevy trucks had the Vehicle Identification Number (VIN) stamped in many different places on the truck. 5 inch rear differential with a 3. 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. i'm trying to figure out the ratio on this rearend using the ratio code but i cant find it ! i read if your facing the diff that its stamped on the left where center section bolts to axle housing at about axle center line level. Look in the glove box for a label or sticker with a bunch of codes like A25, B16, etc One of them will be the gear ratio, IIRC it will be one starting with a G. For either 55 or 56, was there any other gear ratio used in any Chevy (NOT trucks) besides 3. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. For example, 41/10 gives you a 4. Visit Badger Truck & Auto Group in Milwaukee WI serving Chicago, Madison and Green Bay #3GCNWAEH7LG152916. 55 geared and higher (numerically lower) cars used the wide ratio gearbox. Built to help you work smarter, our 2018 Chevrolet Express Cargo Van 2500 W/T looks great in Summit White! Fueled by a massive 6. Ask questions and post answers for 60-66 Chevrolet & GMC Pickups The 1960 - 1966 Chevrolet & GMC Pickups Message Board - The 1947 - Present Chevrolet & GMC Truck Message Board Network Register or Log In To remove these advertisements. 13 HE3 Rear Axle (3,500 Lbs. 2010 Chevy Malibu engine code B, 2. 6L Duramax in GMC and Chevrolet pickups since 2001. 08 gearing common to most half ton trucks today. The codes over the years have been on tags attached to the diff. The suspension was also upgraded with 32 mm (1. Our NV3500 features an efficient two piece design with fully synchronized gears. 10 but i could be wrong. SOMETIMES, if you crawl underneath the truck, there will be a tag on the rear axle cover (held on by a bolt) and the gear ratio will be stamped into the metal tag. By changing the ratio of just the head set (input shaft and front of the countergear) you can change the overall ratio. There are also several ways to determine the ratio manually even if you can't see the number of teeth on the ring gear or pinion. All 67-74 Muncies carry a producion code number stamped vertically on right side of case beginning with "P". all chevy 1/2 ton trucks came with three basic gearsets--3. (example: P8R23 is assembled Oct 23, 1967 for 1968 model year. A stock 1994 chevy silverado come with what gear ratio? its a 2500 5. Back to Chuck's Chevy Truck Pages. GM RPO Axle Code Notes. Yes it should just buy the right one for the diff in your truck and all the shim's bearing or ( 3. 73:1 can be swapped without having to change carriers (except for the truck differentials with 30-spline axles). 1965 Chevy C10, C10 Chevy Truck, Classic Chevy Trucks, Chevrolet Trucks, Chevy Pickups, Old Pickup Trucks, Gmc Pickup, Gm Trucks, C10 Stepside. They have a 40% off sale starting on the 12th. 00 wheel - 10-bolt disc - tubeless. I could see a work truck coming with a lower ratio standard, however, like a 3. 73 to 1 gearing ratio; GT5/GT8. You could be a technician who wishes to look for referrals or address existing problems. Thanks, Jeff. A new wedge type combustion chamber like the V8 was also used. These axles have been used optionally in production with. This is especially true of a vehicle equipped with a V-6 or small V-8. Search Results for Eaton Ring Gear And Pinion on HeavyTruckParts. 10 ratio and need better fuel mileage you would switch to a 3. What rear axle ratio would be best for a large 5th wheel camper cross country trip? The new Super Duty diesel comes with three rear axle ratios: 3. Fuel Injector Length (between O-rings) 2. 95 first gear and is best if you want performance set up. The differential works in the same way except the directions of the axles are at a. 10/1 code GT5 All variants have a Hub Diameter of 3. Page 1 of 3 CHEVROLET KODIAK C8500 Trucks For Sale - 61 Listings | TruckPaper. P0735 Transmission problems. 73 gear ratio rear end for my truck. Reply 1: The best way to tell is to remove the rear cover and count. Other features: four wheel disc brakes and a 9. Note: The mounting pad is usually a part of the extension housing, but the graphic shows it on the maine case. The 4L80-E is rated to max GVWR of 18,000 (Axle and vehicle dependent) The 4L80-E uses 2 shift solenoids, initially called Shift Solenoid A & Shift Solenoid B, later changed to comply with OBD II (On Board Diagnostics revision 2) regulations to 1-2 Shift Solenoid & 2-3 Shift solenoid. The clutch housing is not a removable component. New Process Gear A833 RPO MY6 or MM7 — 4-speed longitudinal A833 overdrive transmission made by New Process Gear for early to mid 1980's General Motors Light Trucks; Muncie SM465 — 4-speed longitudinal manual used in 68- 91 Chevy 1/2 3/4 and 1 ton trucks; New Venture Gear NV1500 — 5-speed longitudinal manual made by New Venture Gear. The superior quality of these gear sets is the result of years of racing development, outstanding design, and state-of-the-art manufacturing methods. Axle Ratio Maximum Trailer Weight lbs. The vin # does not and can not tell any optins on the truck or gear ratio. Those appear to be the only gear ratios offered on that C2500. I make no claims that they are 100% accurate in every way. Reply 1: The best way to tell is to remove the rear cover and count. 3125 inches. 1999: On some extended-cab 4WD trucks, the steering-box mounting bolts were not tightened to specifications. Engine Code. Includes all items to install a later model 1969-87 GM truck power steering gear box onto your classic. 56 G80 - locking differential compare to the codes in your glove box to know which gear ratio you have. 21; the heavier sports a 3. Find Chevrolet Silverado 2500 Trucks for Sale. Read about the history of GM's iconic Allison 1000 transmission, along with its strengths and weaknesses, only on dieselpowermag. 030 over 1969 chevelle 396,350 transmission,np205 transfercase,1979 1 ton single wheel rearends,dana 60 front,corp 14bolt rear,both have disc b. 73/1 code GT4 4. Use our simple Gear Ratio Calculator to quickly find the correct gear ratio for your ring and pinion gear set. Part of the number is stamped on the engine block and transmission. In 1988 and 1989, the choices on half tons were 2. The Gear Box is your online source for t56 transmission parts,t5 transmission parts,borg warner t56,muncie transmission,t10 transmission,super t10 transmission,3550 transmission parts,manual transmission parts,t56 transmission overhaul kit, t56 transmission rebuild,rebuilding a transmission,transmission shift fork,t56 synchronizer assembly,t56 transmission gears,Corvette T56 transmission. I'm running 2,62 pulling mostly heavy hard pulling trailers, not a good set-up for performance, either MPG or pulling. Chevrolet Parts | Parts Category: Rear Axle | Chevs of the 40s is the World's Most Complete Supplier of 1937-1954 Chevrolet Classic Restoration Chevy Rear Axle Parts and Chevy Rear Axle Street Rod Parts for your Car and Truck. It will give you a good idea, but you need to make sure this kit is a match. From 1973 - 1980 Chevy trucks had a 13 digit VIN#. 21 HC9 Rear Axle 5. [ Home ] [ Up ] [ 55 2nd-59 Chevy ] [ 67-72 Chevy ] [ 73-80 Chevy ] [ 81-87 Chevy ] 1967-1972 Chevrolet VIN Number Codes **NOTE** 1972 VIN # will begin as CC or CK The first C stands for Chevrolet the second the Chassis designation. It is located on the right hand side of the case and is composed of two letters. 08 gear in stall kit you still might need a few inner parts some time ) there a few company's to look at. You might get trim-level and engine, but that's about it. In response to 100 CHEVY There is a code stamped onto the outside of the axle that you can use to decode what the stock gear ratio was - but it isn't "sure-fire", because someone could have changed the gear ratio inside the case. So over the long haul, driving a Chevy is a quality decision. Its heavy duty design and proven reliability have made it stand out in the 3/4 and 1 ton marketplace. The close ratio gearboxs generally came with 3. 73 rear ratio, which was standard with the standard engine and transmission. You will need to change the ring and pinion gear. Differential Gear Ratio. Identifying the truck's use is very important and keeping that truck in its dedicated service will improve efficiency and lower costs. 5 inch rear differential with a 3. 73 rear will get it. In this example (Figure 3), GT4 is the axle ratio code. Please Report any Broken Links or Pages that do not load properly. This is especially true of a vehicle equipped with a V-6 or small V-8. We offer quality used parts for Ford, Lincoln, Chevrolet, GMC, Cadillac, Jeep, Dodge, Chrysler, Toyota, Nissan & more! Buy with confidence, we stand behind all of our parts with a minimum 90 day money-back guarantee. 55 (Powerglide tranny), 3. com as a daily part of their ownership experience. The line of six cylinder engines used in Chevrolet light and medium duty trucks are very tough and durable. Gearing is what you are buying when you purchase a Gear Vendors Under/Overdrive. If your 1973 - 1987 body style has a VIN# located on the dashboard, with 17 digits, then it is between 1981 and 1987 model. Visit Badger Truck & Auto Group in Milwaukee WI serving Chicago, Madison and Green Bay #3GNCJPSB3LL162737. 10 gear ratio. Includes all items to install a later model 1969-87 GM truck power steering gear box onto your classic. For a gear ratio on a GM, you need the "RPO" code. gmheritagecenter. For example: GT4 stands for a trucks gear ratio. The RPO code list on trucks was placed in/on the glove box. VIN Breakdown Method. 80s 4x4 chevy trucks (mostly 10 bolt) rears are 6 lug and 3. 73 rear will get it. I have a '72 1/2 ton Chevy. Get Yours Today! We have the best products at the right price. V-8 engine was enlarged in 1969 to 350 CID (stroke increased from 3. Subway Truck Parts has specialized in used pickup truck, van & SUV parts in the greater Sacramento area since 1923. 10 gears and a 2009 GMC 2500hd regular cab with 3. This means that for 3. As with the 235 light truck engine, the 261 came standard with solid valve lifters and an aluminum camshaft timing gear. Chevy 1500 p/u 4wd 88-89 10 Bolt Cover 8. Choose top quality brands Dorman, G2 Axle & Gear, Motive Gear, Richmond Gear. 92 gears in it. Leave the upper part. Diagnostic trouble codes may be cleared by disconnecting the battery ground cable for at least 20 seconds. AAM has developed a series of axle and driveshaft components to make it easier for the installer to perform a repair or a complete replacement job. 5" WB C5B Reg Cab 159. Remanufactured rear differential assembly. The National Highway Traffic Safety Administration (NHTSA) announced the following safety recalls for the 1999-2006 Chevrolet Silverado 1500. I am just getting started and will add to it as more become available to me. 56 to 1 gearing ratio. 56:1 & down = 2. Find 1966 CHEVROLET C10 PICKUP Differential & Rear-End Components and get Free Shipping on Orders Over $99 at Summit Racing!. Car Brakes: How Do You Know When to Change Them? By Zach Bowman For those who suffer a daily commute through heavy traffic, your vehicle's braking system can bring thousands of pounds of metal, plastic and empty Starbucks cups to a stop hundreds of times before you get to work. The line of six cylinder engines used in Chevrolet light and medium duty trucks are very tough and durable. Here are the codes for each one. Engine Code. From 1981 - 1987 Chevy Trucks used a 17 digit VIN#. Well, if you can believe the internet charts, GM used a T5 with a 3. Start by finding your current gear ratio along the top row and then work your way down the column to find the effective difference of other gear ratios. The code designates the gear ratio. We rarely see them fail unless being used for extreme use or performance. Now, here is a test for those who think they know their 55-56 rear gear ratios. 1 SFI engine. Classic Industries offers a wide selection of 1954 Chevrolet Truck parts, including 1954 Chevrolet Truck interior parts and soft trim, 1954 Chevrolet Truck exterior sheet metal, 1954 Chevrolet Truck moldings, 1954 Chevrolet Truck emblems, 1954 Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. Whatever engine RPM youre turning should be close to your final drive. The Chevy Silverado 1500 full-size pickup truck is expected to see several updates and changes for the 2017 model year. 1974 Chevy/GMC Pickup Truck Chevy C10/GMC K10 Third Generation. Richmond Excel - Rear 8. Variations of this can be found in the rear of GM S-trucks and some Isuzus, and in the front of S-trucks. Its heavy duty design and proven reliability have made it stand out in the 3/4 and 1 ton marketplace. The NV3500 is used with 3. Chevrolet Transmission Dimensions Dimension "C" is the distance from the bellhousing to the center of the transmission mounting pad. New 2020 Chevrolet Silverado 1500 WT 2D Standard Cab for sale - only $30,700. A stock 1994 chevy silverado come with what gear ratio? its a 2500 5. Is there a coding system that will let me tell? The truck has a 4-speed manual (stock) and is running 31 X 10. 0 Oil Pressure Gauge reads from 0-100 psi Speedometer reads up to 160 MPH includes one button calibration (regardless of tire size, gear ratio, or transmission), odometer, trip meter, high speed recall, 0-60 time, and ¼ mile elapsed time (ET), all with the push of a button!. Originally, gear ratios ranged from 2. The code designates the gear ratio. Some Muncies also carry ratio I. From backing plate-to-backing plate, 53. Built to help you work smarter, our 2018 Chevrolet Express Cargo Van 2500 W/T looks great in Summit White! Fueled by a massive 6. Visit Ken Garff Automotive Group in Salt Lake City UT serving Ogden, Bountiful and Draper #3GCNYAEF4KG267979. The passenger car's 235 was equipped with hydraulic valve lifters and a fiber timing gear for quieter operation. Read about the history of GM's iconic Allison 1000 transmission, along with its strengths and weaknesses, only on dieselpowermag. The superior quality of these gear sets is the result of years of racing development, outstanding design, and state-of-the-art manufacturing methods. Get Yours Today! We have the best products at the right price. Fuel Injector Connector: EV6 / USCAR. The D35 is a stronger (than the D28) and can be swapped over from a Ranger (or newer BII, if not already equipped). The Chevy NV3500 Transmission. 07 H04 Rear Axle 4. Used 2017 Chevrolet Colorado LT Truck for sale - only $27,895. Modify your Jeep, truck, muscle car or off-road vehicle with cylinders, tie-rods and other high quality steering components from PSC Motorsports. 73/1 code GT4 4. This model 3100 (1/2 ton) Panel Truck was rusting away due to moisture in the red clay that was caked inside and underneath every part of the body. 42 gears - Tweet We've been experimenting with many stock and aftermarket gear sets in our 2011 Chevy Silverado test truck and have some rather conclusive results from our experiences. com as a daily part of their ownership experience. 30 gears (which is common with automatic transmissions), and a 2-pinion design (common in 4 cylinders). The higher numerically (i. This is a Chevy C-class C&C truck (so bigger than a one-ton pickup, and it wouldn;t have a 14-Bolt rear axle but the pic clearly illustrates the "C&C" concept. You will need to know that there are different series’ of differentials (series two and three). Look in the glove box for a label or sticker with a bunch of codes like A25, B16, etc One of them will be the gear ratio, IIRC it will be one starting with a G. From service and repair work to collisions, your truck has seen its fair share of tweaks, upgrades, modifications, overhauls, and general maintenance as well as minor and major repairs in its lifetime. 1964-67 Chevelle rear ends were manufactured by the Chevrolet Gear and Axle Division and were the same width. all manual case casting numbers are 5679142 regardless of ratio for Camaro. Maintenance is key. LIGHT DUTY TRUCK REAR AXLE IDENTIFICATION. The GM 10-bolt is named for the number of bolts on the cover; ring gear diameter is 7 1/2 inches. Is the RPO code sticker still in the glovebox? If so, the gear ratio is listed, but in 'code' form. Here are the ratios for both,. The SM465 is an outstanding, heavy-duty truck transmission designed and used in ½, 3/4 and 1+ ton trucks. This tag is off a 74 Ford truck. If the axle ratio is too tall. Pulling the cover is the guaranteed way to find out what you have. If there are other transmission codes, repair those problems first before proceeding with an incorrect gear ratio code. 1974 Chevy/GMC Pickup Truck Chevy C10/GMC K10 Third Generation. Yes it should just buy the right one for the diff in your truck and all the shim's bearing or ( 3. The close ratio gearboxs generally came with 3. 2010 Chevrolet Silverado 1500 Configurations. American Muscle and Diesel Performance Parts! RPM Outlet Lowest Prices with Fast, Free Shipping. Ordering the right axle ratio can further help tailor a new GMC truck or SUV to your particular needs. 10 to 15% of the trailer. First gear is 2. How do I determine the rear end gear ratio on my 1977 Chevy pickup? Where are the codes and if I buy a replacement rear - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. 10/1 code GT5 All variants have a Hub Diameter of 3. 73 gears and 29-inch tires and as the above example shows it had a 18 tooth drive gear and a 35 tooth driven gear like the ones pictured here. All 67-74 Muncies carry a producion code number stamped vertically on right side of case beginning with "P". Over 29,000 old truck enthusiasts sharing knowledge and experience. New 2020 Chevrolet Colorado Work Truck 4D Extended Cab for sale - only $30,279. Selecting optional gear ratio within the same vehicle will result in significant towing capacity changes. You could be a technician who wishes to look for referrals or address existing problems. 10 gears and a 2009 GMC 2500hd regular cab with 3. There are 2 types of 14 bolt Rear Ends. Visit Chevrolet for more information on the Chevy Colorado. 875-inch 12-bolt Positraction was the most widely used in 1965-'72 Chevrolet passenger car applications. I bought my 1994 1500 manual transmission and 21 years later with 245,000 miles it runs better than new. 73-87 Chevy Pickup RPO's (A - L) This isn't a complete list of all the RPO codes for our trucks. Or, change input variables (engine RPM, axle gear ratio and tire height) to determine vehicle speed in each forward gear. Call us at 1-866-737-4966 with any questions you may have about your diesel. Here are the codes for each one. Choosing the correct gear ratio is critical to maximizing performance, efficiency, and drivability for a wide range of vehicles operating even under the most extreme conditions. Example; the original rear pinion gear on my k10 exploded, and it was cheaper to buy a parts truck with a good axle than to. A stock 1994 chevy silverado come with what gear ratio? its a 2500 5. Quiet running and easy to set up makes these gears perfect for your car. to 2nd gear to get. WT and LT are bringing more features and higher price. The fourth digit of the warranty or vehicle identification number indicates basic engine identification. I will be adding to this list as I get more info. Atomic Chevy cab lights -125 Driveshaft-75 Tailgate with dent from trailer otherwise it's solid- 100 Rear seats - 75 each Aftermarket Taillights - 100 (Has small crack at top) Driver fender with flair mounting holes and some rust by bumper -45 Pass fender some rust under silver wheel well 45 Have other pass and driver fenders also Hood- 100. WT and LT are bringing more features and higher price. The gear ratio codes are located on the front passenger side of the differential as shown in the illustration below. 06 first gear which is good for initial take off but …. Lower ratios are good for towing and performance but will be less fuel efficient. 11 rear would give you 10. If you're wondering what the original specifications looked like for these trucks, or what options were favorites from the factory, here are all the relevant numbers and facts. Does any one have any back on the gas mileage for the above configurations. My Porsche runs like a scalded ape in first gear and it's overall ratio is 13. THe code is stamped on the right axle tube (as viewed from the front of the car) on the forward side. From buying research to owner support, join 1. com Install the shaft or joint on the gear box/rack. Horsepower and torque ratings for GM van engines are: for the 5. 0 Oil Pressure Gauge reads from 0-100 psi Speedometer reads up to 160 MPH includes one button calibration (regardless of tire size, gear ratio, or transmission), odometer, trip meter, high speed recall, 0-60 time, and ¼ mile elapsed time (ET), all with the push of a button!. Change Ratio Saginaw 4 Speed. 6L DI DOHC V6 VVT, CUSTOM SPECIAL EDITION. Horsepower requirements for some transmissions. As the 1-2-3-4 and 3-5-R clutch housing rotates, the sensor produces a signal frequency based on the machined surface of the 1-2-3-4 and 3-5-R clutch housing. 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. Let me know what you need. Maintenance is key. I need to know what the stock gear ratio is for a 1986 K10 Chevy truck. Edmunds' expert review of the Used 2015 Chevrolet Silverado 1500 provides the latest look at trim-level features and specs, performance, safety, and comfort. They have a 40% off sale starting on the 12th. Lower ratios are good for towing and performance but will be less fuel efficient. Duramax Parts specializes in quality used Chevy Silverado, Suburban, Tahoe and GMC Sierra, Yukon, and Yukon XL Parts and has a huge inventory of late 1999-2007 Classic Chevy Silverado/GMC Sierra 1500, 2500, 3500 parts. 0 Oil Pressure Gauge reads from 0-100 psi Speedometer reads up to 160 MPH includes one button calibration (regardless of tire size, gear ratio, or transmission), odometer, trip meter, high speed recall, 0-60 time, and ¼ mile elapsed time (ET), all with the push of a button!. 73 gear ratio i need to remove and replace front differential on a 2001 chevy taho 3. 92 normally, the 3. Augustine and Orange Park #3GCUYBEF4LG143990. That's pretty extreme and it winds up fast. Login or register now to gain instant access to the rest of this premium content! Often overlooked, optional gear ratios play a key role in pickup truck performance. Home / Trucks / Crossovers / Silverado Gear Sort by Price Low->High Price High->Low Title A->Z Title Z->A Item Code A->Z Item Code Z->A Popularity Top Rated. This is a Chevy C-class C&C truck (so bigger than a one-ton pickup, and it wouldn;t have a 14-Bolt rear axle but the pic clearly illustrates the "C&C" concept. Note: the "code" column of the chart simply corresponds to the common first-through-fourth gear ratio combinations. The 4L80-E is rated to max GVWR of 18,000 (Axle and vehicle dependent) The 4L80-E uses 2 shift solenoids, initially called Shift Solenoid A & Shift Solenoid B, later changed to comply with OBD II (On Board Diagnostics revision 2) regulations to 1-2 Shift Solenoid & 2-3 Shift solenoid. If your looking for more power or performance, you would switch to a lower ratio. This tag is off a 74 Ford truck. 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. 73 gear ratio. For more information, read "What's on your tire's sidewall," As an added bonus, the Gear Ratio Calculator doubles as a Vehicle Speed Calculator. Chevy Silverado 1500 - Silverado Gas Mileage - Repair History - Silverado Accessories - Buying A Chevy - About Us Chevy Silverado 1500 with 3. For 1991 a "more civilized" 454 SS came out, with four-speed electronic automatic transmission, 25 more horsepower, and even higher torque: 405 lbs/ft at 2400 rpm. The original buyer, however, wanted the 3. However, not all Chevy Silverado 1500 models with the same engine and transmission that produce the same amount of horsepower and torque can tow the same amount and that's due to the overall weight of the truck (truck cab and other equipment), as well as the truck's axle ratio. New 2020 Chevrolet Silverado 1500 WT 2D Standard Cab for sale - only $30,700. 07 H04 Rear Axle 4. If your differential has been removed so that you can see and count the teeth on the gears, you can divide the number of teeth on the ring gear by the number of teeth on the pinion gear to come up with their ratio. Power steering bracket kit fits 1960-66 Chevy C10, GMC C15 and C20 trucks. I’m not sure of the gear ratio. Swapping out the entire differential is not that much of a hassle, and most of the trucks I have seen, including mine, have been swapped at some point. This list acts as a decoder, letting you search by equipment or code to learn more about your truck. 5 Ring Gear Size 3. And over the last four years, Chevy rose to the top across cars, trucks and SUVs. I'm running 2,62 pulling mostly heavy hard pulling trailers, not a good set-up for performance, either MPG or pulling. These transmissions complicate close and a wide gear ratio. Well, if you can believe the internet charts, GM used a T5 with a 3. Find 1966 CHEVROLET C10 PICKUP Differential & Rear-End Components and get Free Shipping on Orders Over $99 at Summit Racing!. 92 normally, the 3. The close ratio uses a 2. 10:1 in some pickups. Includes all items to install a later model 1969-87 GM truck power steering gear box onto your classic. A 3-speed automatic transmission and 3. P0733 Improper Ratio for Third Gear. codes that were used by Chevrolet from 1963 thru the 70's. Silverado trucks with this package are rated to tow 10,700 pounds. 73 rear will get it. 0-inch and […]. Used 2017 Chevrolet Colorado LT Truck for sale - only $27,895. Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled "Service Parts Identification" inside the drivers door panel or glove box. Using the charts below, you will be able to learn alot about the rear differential in your classic full size Chevy. The front axle should have the same gear ration as the rear. FROM THE FACTORY IN 1955 there were ONLY 3 gear ratios: 3. Tire diameter will also have an effect on a vehicle's final. Voltmeter with high and low voltage reads from 10. Incorrect ratio codes typically require an advanced mechanical ability and diagnostic tools. 5mm) which is larger than the hub of the AD. 1978 Chevy Truck Specs and Features. 55 (Powerglide tranny), 3. GM CORPORATE 10-BOLT This 10-bolt, with a larger 8 1/2-inch ring gear diameter, replaced the Dana 44 that was used in the front of some pre. 42 Ratio Gear Set. Get a great deal on a Power Steering Gear Box here. They are 2 completely different systems. With a simple Google search you can find a chart of axle codes. For example, my Japanese truck's code is G282. If you don't see the GMC Chevy C5500, C6500, C7500, C8500, Kodiak, Topkick 1995-2002 Hoods you need on our website, please call us at 800 541. If your truck has the VIN# on the dash, but it is not 17 digits, then it is a 1979 or 1981 model. I just found out I've got both! Woot. 42/1 code GU6 3. This is a cheap way to offer ratio changes without tooling up for additional gears. 73/1 code GT4 4. Reg Cab 135. Especially after DECADES have passed. Chevy 1500 p/u 2wd 88-98 (5. That would price the axle assembly at $143 including a $20 core charge. 41 through 4. Chevy 350 Engine - GM Chevrolet 5. do NOT contact me with unsolicited services or offers. With the exception of truck differentials with 30-spline axles, and those carrying 2. 29 HC4 Rear Axle 4. There was only 1 available transfer case in 1990, the NP241C. Get Yours Today! We have the best products at the right price. Does any one have any back on the gas mileage for the above configurations. 27 inch tires with a 3. 73 gears (series two), the differentials will support all gear ratios without having to change.