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MOTIVE GEAR MAINSHAFT TR4050 19.78 OA - WA4050-2

$266.14 $186.07 Save $80.07

SKU: M01Z WA4050-2

In Stock
In Stock
Ships by Jun 15
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The Motive Gear WA4050-2 Main Shaft is a critical internal component designed for the Tremec TR4050 5-speed manual overdrive transmission. This main shaft contributes to the TR4050's robust performance in heavy-duty 4WD applications, featuring high-contact constant mesh helical gears for smooth and efficient power transfer. Its construction is integral to the transmission's ability to handle high torque loads and provide both a low first-gear ratio for off-road use and an overdrive fifth gear for highway efficiency.

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

BrandMotive Gear
Part NumberM01Z WA4050-2

Videos

American Powertrain TREMEC TR4050 5-Speed Transmission - Stacey David's Gearz Parts Bin

American Powertrain TREMEC TR4050 5-Speed Transmission - Stacey David's Gearz Parts Bin
TREMEC TR 4050

TREMEC TR 4050
TR4050 Ensamble

TR4050 Ensamble
Ford's Secret Overdrive Transmission by Tremec

Ford's Secret Overdrive Transmission by Tremec
Taking a drive with the Tremec TR-4050

Taking a drive with the Tremec TR-4050
TR-4050 Installation Series - Part 3

TR-4050 Installation Series - Part 3
TREMEC TR-4050 Review

TREMEC TR-4050 Review
Heavy Duty Powertrain! Tremec TR4050 backed up by an NP203/205 Doubler!

Heavy Duty Powertrain! Tremec TR4050 backed up by an NP203/205 Doubler!

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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