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Drivetrain› Automatic Transmissions and Components

TCI

Smart Sunshell for GM 700-R4 / 4L60E

$171.29 $144.95 Save $26.34

SKU: TCI373900

In Stock
In Stock
Ships by Jul 29
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30 Days Return
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Description

The TCI Smart Sunshell is a direct replacement component for GM 700-R4 and 4L60E transmissions manufactured in 1982 and later. It addresses the common weak point of the OEM sun shell assembly, which can lead to sudden loss of reverse, 2nd, and 4th gears. This improved sun shell features a thicker design and a revised splined area to prevent fatigue failure.

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

BrandTCI
Part NumberTCI373900
CategoryDrivetrain

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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