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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 Make/Model
Buick Century 1955-1958 Base
Buick Electra 1959-1967 Base
Buick Electra 1959-1962 225
Buick Electra 1966-1967 Custom
Buick Gran Sport 1965-1967 Base
Buick Invicta 1959-1960 Base
Buick LeSabre 1959-1960, 1963-1968 Base
Buick LeSabre 1965-1968 Custom
Buick Skylark 1961-1968 Base
Buick Skylark 1968 Custom
Buick Special 1955-1958, 1961-1968 Base
Buick Special 1961-1967 Deluxe
Buick Sportwagon 1965-1968 Base
Buick Sportwagon 1966, 1968 Custom
Buick Super 1955-1958 Base
Buick Wildcat 1963-1968 Base
Buick Wildcat 1965-1968 Custom
Buick Wildcat 1965 Deluxe
Buick Wildcat 1966 Gran Sport
Chevrolet Bel Air 1955-1956 Beauville
Chevrolet Bel Air 1955-1968 Base
Chevrolet Bel Air 1955-1957 Nomad
Chevrolet Biscayne 1958-1968 Base
Chevrolet Biscayne 1960 Fleetmaster
Chevrolet C10 Panel 1967 Base
Chevrolet C10 Pickup 1967-1968 Base
Chevrolet C10 Suburban 1967-1968 Base
Chevrolet C20 Suburban 1967-1968 Base
Chevrolet Camaro 1967-1968 RS
Chevrolet Camaro 1967-1968 Base
Chevrolet Camaro 1967-1968 Z28
Chevrolet Camaro 1967-1968 SS
Chevrolet Caprice 1966-1968 Base
Chevrolet Chevelle 1964-1965 Malibu Super Sport
Chevrolet Chevelle 1964-1968 300
Chevrolet Chevelle 1964-1966, 1968 SS
Chevrolet Chevelle 1965-1968 300 Deluxe
Chevrolet Chevelle 1965-1968 Malibu
Chevrolet Chevelle 1966 Super Sport 396
Chevrolet Chevelle 1967-1968 Concours
Chevrolet Chevelle 1967-1968 SS 396
Chevrolet Chevelle 1968 Base
Chevrolet Chevelle 1968 Nomad
Chevrolet Chevelle 1968 Nomad Custom
Chevrolet Chevy II 1962-1967 Nova
Chevrolet Chevy II 1962-1967 Base
Chevrolet Chevy II 1964-1967 Nova SS
Chevrolet Corvette 1955-1968 Base
Chevrolet Del Ray 1958 Base
Chevrolet El Camino 1959-1960, 1964-1968 Base
Chevrolet El Camino 1968 SS
Chevrolet El Camino 1968 Custom
Chevrolet G20 Van 1967-1968 Base
Chevrolet G20 Van 1968 Sportvan
Chevrolet Impala 1958-1968 Base
Chevrolet Impala 1964-1967 SS
Chevrolet K10 Pickup 1967-1968 Base
Chevrolet K10 Suburban 1967-1968 Base
Chevrolet K20 Suburban 1967-1968 Base
Chevrolet Nomad 1958-1961 Base
Chevrolet One-Fifty Series 1955-1957 Base
Chevrolet P10 Series 1960-1967 Base
Chevrolet Sedan Delivery 1955-1960 Base
Chevrolet Truck 1955-1958 3700
Chevrolet Truck 1955-1958 3100
Chevrolet Truck 1955-1958 3600
Chevrolet Truck 1955-1958 3400
Chevrolet Truck 1955-1958 Base
Chevrolet Truck 1955-1958 3800
Chevrolet Truck 1955-1958 3200
Chevrolet Truck 1955-1958 3500
Chevrolet Two-Ten Series 1955-1957 Del Ray
Chevrolet Two-Ten Series 1955-1957 Base
Chevrolet Yeoman 1958 Base
GMC 100 1955-1959 Base
GMC 150 1955-1959 Base
GMC 1500 1966 Base
GMC 1500 Series 1960-1965 Base
GMC 250 1955-1959 Base
GMC C15/C1500 Pickup 1967-1968 Base
GMC C15/C1500 Suburban 1967-1968 Base
GMC G1500 1964-1966 Base
GMC I1000 1964-1966 Base
GMC I1500 1965-1966 Base
GMC I2500 1965-1966 Base
Oldsmobile 442 1965-1968 Base
Oldsmobile 88 1955-1957 Base
Oldsmobile 88 1955-1957 Holiday
Oldsmobile 98 1955-1960, 1965-1968 Base
Oldsmobile 98 1958-1960, 1965-1967 Holiday
Oldsmobile Cutlass 1964-1965 Holiday
Oldsmobile Cutlass 1964-1965 Base
Oldsmobile Delmont 88 1967-1968 Base
Oldsmobile Delmont 88 1967 Holiday
Oldsmobile Delta 88 1968 Custom
Oldsmobile Delta 88 1968 Base
Oldsmobile Dynamic 88 1958-1960, 1965-1966 Base
Oldsmobile Dynamic 88 1958-1960, 1965-1966 Holiday
Oldsmobile F85 1961-1968 Base
Oldsmobile F85 1962-1966 Deluxe
Oldsmobile F85 1966 Holiday
Oldsmobile Jetfire 1962-1963 Base
Oldsmobile Jetstar 88 1964-1966 Base
Oldsmobile Jetstar 88 1964-1966 Holiday
Oldsmobile Jetstar I 1964-1965 Base
Oldsmobile Starfire 1964-1966 Base
Oldsmobile Super 88 1955-1960, 1964 Base
Oldsmobile Super 88 1955-1960, 1964 Holiday
Oldsmobile Vista Cruiser 1964-1967 Custom
Oldsmobile Vista Cruiser 1964-1968 Base
Pontiac Acadian 1962-1967 Base
Pontiac Bonneville 1957-1968 Base
Pontiac Bonneville 1959-1968 Safari
Pontiac Bonneville 1959-1962 Custom
Pontiac Catalina 1959-1968 Base
Pontiac Catalina 1959-1968 Safari
Pontiac Catalina 1962-1968 Ventura
Pontiac Catalina 1964-1967 2+2
Pontiac Chieftain 1955-1958 Base
Pontiac Chieftain 1955, 1958 Safari
Pontiac Chieftain 1957 Custom Safari Transcontinental
Pontiac Chieftain 1957 Custom Safari
Pontiac Executive 1967-1968 Safari
Pontiac Executive 1967-1968 Base
Pontiac Firebird 1967-1968 Sprint
Pontiac Firebird 1967 326
Pontiac Firebird 1967-1968 HO
Pontiac Firebird 1967-1968 Base
Pontiac Firebird 1967-1968 400
Pontiac Firebird 1968 350
Pontiac GTO 1964-1966 Base
Pontiac Grand Prix 1962-1968 Base
Pontiac LeMans 1963-1968 Base
Pontiac Star Chief 1955-1966 Base
Pontiac Star Chief 1955-1957 Custom
Pontiac Star Chief 1958 Custom Safari
Pontiac Star Chief 1958 Super Deluxe
Pontiac Star Chief 1966 Executive
Pontiac Super Chief 1957-1958 Base
Pontiac Tempest 1961, 1964-1968 Custom
Pontiac Tempest 1961-1968 Base
Pontiac Tempest 1961-1962 LeMans
Pontiac Tempest 1961-1968 Safari

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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