Drivetrain› Manual Transmissions and Components

USA Standard Gear

Manual Transmission Bearing and Installation Kit

$93.79

SKU: ZMBK124J

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The USA Standard Gear ZMBK124J is a manual transmission bearing and installation kit designed for the SR4 transmission. It features a 10-bolt top cover and a 9 3/16" main case length. The kit includes synchronizer rings and ball-type input and rear output bearings.
Show original supplier description
The USA Standard Gear ZMBK124J is a manual transmission bearing and installation kit engineered for the SR4 transmission, offering a reliable solution for rebuilding worn bearings. This kit features a 10-bolt top cover and a 9 3/16" main case length, constructed with an aluminum case and top cover for durability. Included in the kit are essential synchronizer rings, along with ball-type input and rear output bearings, ensuring a complete overhaul. The design also incorporates a gear shift lever mounted in the rear adapter housing. This bearing kit is specifically designed for 1979-1982 Jeep 4-speed SR4 manual transmissions. USA Standard Gear is a trusted brand for installers prioritizing quality and value in their drivetrain components.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandUSA Standard Gear
Part NumberZMBK124J
CategoryDrivetrain
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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