USA Standard Gear

Manual Transmission Bearing and Installation Kit

$93.79

SKU: ZMBK124J

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandUSA Standard Gear
Part NumberZMBK124J
CategoryDrivetrain

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy