Drivetrain› Automatic Transmissions and Components

Sun Coast Converters

Suncoast Pinless Forward Accumulator Piston Kit SUNSC-77987-01K

$37.00

SKU: S02K SC-77987-01K

In Stock
In Stock
Ships by Jun 16
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Sun Coast Converters Pinless Forward Accumulator Piston Kit is designed to address common issues in GM 4L60-E, 4L65-E, and 4L70-E automatic transmissions. Plastic forward accumulator pistons in these units can wear or crack, leading to fluid loss, delayed engagement, slips, and burnt clutches or bands. This kit eliminates these problems.

Featuring dual seals for a stable and tight bore seal, the pinless design prevents pin leakage and piston cocking. It also includes steel balls to plug the existing pin bore in the valve body, further ensuring proper operation.

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

BrandSun Coast Converters
Part NumberS02K SC-77987-01K

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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