Drivetrain› Manual Transmissions and Components
USA Standard (Yukon)
USA Standard Manual Transmission T56 5th Gear Countershaft 58-Tooth T56 M T 5TH COUNTERSHAFT GEAR 58
SKU: U018 ZMT56-19
Moderate — 2–4 hours
Description
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
| Brand | USA Standard (Yukon) |
| Part Number | U018 ZMT56-19 |
Videos
T56 countershaft extension and final assembly
Fix your Tremec T56 Transmission for $5 (Corvette, Mustang Cobra, Viper, and more!)
Differences Between Stock T56 OE Vs Magnum 6 Speed Internals
How to set endplay on your Tremec T-56 Magnum Transmission
Auto to manual swap any 99-06 yukon, Tahoe, 1500… DRIFT DENALI BUILD IS HERE!!
GM manual trans specs - 4spd 5spd 6spd 2wd 4wd - LS SBC BBC
A Guide To Tremec Manual Transmissions
Tremec T56 Magnum 6 Speed Transmission Overview
5 Speed vs 6 Speed Transmission #tremec #transmission #5speed #6speed #manualtransmission
Magnum T56 Swapped GMC Sierra
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.
View Full Return Policy