Drivetrain› Manual Transmissions and Components

USA Standard (Yukon)

USA Standard Manual Transmission T56 3rd 4th Spring Key Kit Billet Keys T56 M T SPRING KEY KIT M T

$37.67

SKU: U018 ZMT56-K3B

In Stock
In Stock
Ships by Jun 17
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The USA Standard Gear ZMT56-K3B is a manual transmission spring key kit designed for T56 transmissions. It specifically includes billet keys for 3rd and 4th gear engagement. This kit is a replacement part for your vehicle's transmission.

Fitment

Fitment Guaranteed

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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 (Yukon)
Part NumberU018 ZMT56-K3B

Buy with Confidence

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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