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USA Standard Gear Manual Bearing Kit for 1955-1968 GM 3-Speed 4-Bolt Side Cover ZMBK131A
$103.89

USA Standard Gear ZMBK131A M/T Bearing Kit

If you're looking to keep your classic GM vehicle running smoothly, the USA Standard Gear ZMBK131A M/T Bearing Kit is an essential component for your transmission overhaul. Designed specifically for models from 1955 to 1968, this kit is a reliable choice for those who appreciate the craftsmanship of their vintage rides.

Product Overview

This M/T Bearing Kit is tailored for the Muncie 318 non-overdrive transmission, featuring a 4 bolt side cover and a main case that measures 7-1/8 inches long. It’s synchronized in both 2nd and 3rd gears, ensuring smooth shifting and reliable performance. Please note that this kit does not include synchronizer rings, so be sure to have those on hand if needed for your restoration project.

Features

  • Compatible with a variety of classic GM models
  • 4 Bolt Side Cover for easy installation
  • 7-1/8 inch Long Main Case for accurate fitment
  • Synchronized in 2nd and 3rd gears for optimal performance
  • California Proposition 65: No

Fitment

This bearing kit is compatible with several classic vehicles, including:

  • Buick Century (1955-1958)
  • Buick Electra (1959-1967)
  • Chevrolet Bel Air (1955-1968)
  • Chevrolet Camaro (1967-1968)
  • Oldsmobile 442 (1965-1968)
  • Pontiac GTO (1964-1966)
  • And many more!

Technical Specifications

  • Transmission Type: Muncie 318 Non-Overdrive
  • Main Case Length: 7-1/8 inches
  • Synchronization: 2nd and 3rd gears

Customer Feedback

Classic car owners have found this kit invaluable for their rebuilds. For instance, a Chevrolet Impala owner shared, “I installed the ZMBK131A in my 1965 Impala, and it shifted like new again. Perfect fit, and I didn’t have to worry about any missing parts!”

Whether you're restoring a vintage ride or simply need to replace worn-out components, the USA Standard Gear ZMBK131A M/T Bearing Kit delivers the quality and reliability you expect from a trusted name in automotive parts.

Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1955-1958
Buick Century
1959-1967
Buick Electra
1965-1967
Buick Gran Sport
1959-1960
Buick Invicta
1959-1960, 1963-1968
Buick LeSabre
1961-1968
Buick Skylark
1955-1958, 1961-1968
Buick Special
1965-1968
Buick Sportwagon
1955-1958
Buick Super
1963-1968
Buick Wildcat
1955-1968
Chevrolet Bel Air
1958-1968
Chevrolet Biscayne
1967-1968
Chevrolet C/K 10
1967-1968
Chevrolet Camaro
1966-1968
Chevrolet Caprice
1964-1968
Chevrolet Chevelle
1962-1967
Chevrolet Chevy II
1955-1968
Chevrolet Corvette
1958
Chevrolet Del Ray
1959-1960, 1964-1968
Chevrolet El Camino
1958-1968
Chevrolet Impala
1955-1957
Chevrolet One-Fifty Series
1960-1967
Chevrolet P10 Series
1955-1957
Chevrolet Sedan Delivery
1967-1968
Chevrolet Suburban
1955-1958
Chevrolet Truck
1955-1957
Chevrolet Two-Ten Series
1960-1965
GMC 1500 Series
1967-1968
GMC C/K 15
1966
GMC I1000
1966
GMC I1500
1966
GMC I2500
1965-1968
Oldsmobile 442
1955-1956
Oldsmobile 88
1955-1956, 1958-1960, 1965-1968
Oldsmobile 98
1964-1965
Oldsmobile Cutlass
1967-1968
Oldsmobile Delmont 88
1968
Oldsmobile Delta 88
1958-1960, 1965-1966
Oldsmobile Dynamic
1961-1963
Oldsmobile F85
1963
Oldsmobile Jetfire
1964-1966
Oldsmobile Jetstar 88
1964-1966
Oldsmobile Starfire
1955-1960, 1964
Oldsmobile Super 88
1966-1968
Oldsmobile Vista Cruiser
1957-1968
Pontiac Bonneville
1959-1962
Pontiac Catalina
1955-1956, 1958
Pontiac Chieftain
1967-1968
Pontiac Firebird
1964-1966
Pontiac GTO
1962
Pontiac Grand Prix
1955-1956, 1959-1962
Pontiac Star Chief
1957-1958
Pontiac Super Chief
1961-1968
Pontiac Tempest

USA Standard Gear Banner

Who is USA Standard Gear?

USA Standard Gear is a company that supplies high-quality parts for the automotive industry. They are a one-stop-shop for all your drivetrain component needs and have one of the industry's most comprehensive parts list and inventory. Today, they are considered the leading supplier of these parts in the United States.

Drivetrain Experts

The company offers various parts ranging from axles, differential gears, lockers, limited slips, drivelines, and more. It is built by a team of craftsmen who has years of experience when it comes to assembling and modifying their own builds. This passion is what drives the company to create some of the best products in the market.

Quality In Every Product

All their parts are manufactured in their facility equipped with the latest and most sophisticated tools available today. They also have two high-tech testing labs to ensure that every product comes out with the company's quality.

The USA Standard Gear engineering team is constantly on edge trying to find ways to develop and further improve their products. That is why they can produce innovative parts that adapt to the changing trend in the automotive world.

Purchase USA Standard Gear at Vivid Racing

If you are in the market for reliable and top-notched drivetrain components, then USA Standard Gear is the brand for you. With years of experience developing their products, they have provided their customers with parts they could trust, whether it's a replacement component or an upgrade. 

To know more about USA Standard Gear, visit Vivid Racing and check out their list of offerings that fit your specific requirement.





USA Standard Gear® ("USA Standard") warrants the original retail purchaser that all USA Standard products will be free from defects in materials and workmanship for the periods shown herein. USA Standard makes no other warranty of any kind, express or implied. All other warranties, including but not limited to an implied warranty of merchantability or fitness for a particular purpose, are excluded. This warranty is offered provided that the USA Standard product has been installed and maintained in accordance with USA Standard instructions, and that it has not been subject to modification, accident, abnormal use or misuse. At USA Standard's discretion, this warranty may be voided if installation of USA Standard product(s) occurs on vehicles with tires that exceed USA Standard Maximum Recommended Tire Size.

Upon notification of a warranty claim, USA Standard shall investigate the claim of defect, and, in the event of a verified defect, shall, at their sole choice, either repair the defective product or replace it.

This warranty does not cover, and USA Standard shall not be liable for, incidental or consequential damages, including loss of time, road service charges, labor charges, inconvenience, loss of vehicle use, loss of revenues, or loss or damage to personal property (including loss or damage to vehicle parts due to the failure of the USA Standard product). In addition, this warranty does not cover, and USA Standard shall not be liable for, any undertaking, representation, or agreements made by dealers or other third parties selling USA Standard Gear® products, except where such agreements are within the provisions of this Warranty statement. Also, this warranty does not cover damage to the axle caused by or facilitated by failure of a non-USA Standard component.

This agreement offers you specific legal rights. You may also have other rights which vary from state to state.

USA STANDARD GEAR® WARRANTY BY PRODUCT
USA Standard Product Length of Warranty (From date of sale) NOTES
SpoolAs long as original purchaser owns vehicle in which Spool is originally installed It is normal for Spools to cause tire chatter, squeal, or scrubbing when vehicle is not moving in a straight line. Both rear tires must measure the same height from ground to top of wheel for Spool to function properly without premature wear.
Rear Axle (1040/1050)Five (5) Years Covers parts for five years against manufacturing defects.
Front Axle (Series ZA W)Five (5) Years Five year warranty covering manufacturing defects and axle breakage. This warranty is not transferable to another party. “No Questions Asked” replacement for first warranty return, however, USA Standard Gear reserves the right to either replace axle or refund original purchase price after the first warranty claim. USA Standard Gear (through RANDYS Worldwide Automotive) makes final determination on warranty considerations.
Ring & Pinion Gear SetOne (1) YearWarrantied against manufacturing defects for one (1) year.
Positraction DifferentialOne (1) Year Exclusions apply, does not cover premature clutch wear or abuse. It is normal for Positraction differentials to cause tire chatter, squeal, or scrubbing when vehicle is not moving in a straight line. Both rear tires must measure the same height from ground to top of wheel for differential to function properly without premature wear. Limited slip additive or appropriate friction modifier must be used with oil to reduce Positraction chatter.
Spartan LockerOne (1) YearWarrantied against manufacturers defects for one (1) year.
Install KitsOne (1) Year Includes ZBK, ZPK, and ZK. Covers parts for one year against manufacturing defects.
Spider Gear Kits (ZIK)One (1) YearOne year against manufacturing defects. Exclusions apply, does not cover clutch wear in limited slip differentials.
Replacement Driveshafts (ZDS)One (1) Year Warrantied against manufacturing defects for one (1) year.

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