Sale

Drivetrain Automatic Transmissions and Components

Sun Coast Converters

Suncoast GM CATEGORY 2 4L60E REBUILD KIT WITH CONVERTER SUNSC-4L60E-CAT2-A

$3,095.00 $3,002.15 Save $92.85

SKU: S02K SC-4L60E-CAT2-A

In Stock
In Stock
Ships by Jun 14
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The SunCoast Alto 4L60/65/70E Category 2 Rebuild Kit (SC-4L60E-CAT2-A) is a high-performance solution for rebuilding and upgrading General Motors' 4L60E, 4L65E, and 4L70E automatic transmissions. This comprehensive kit addresses common weaknesses and improves durability and performance for demanding applications.

It includes a new 4L60E overhaul kit, Alto Red Eagle clutch kit with power packs, high-performance Kolene steel kit, new 4L60E filter, bushing kit, and thrust washer kit. Key upgrades feature Sonnax components, a Borg Warner Upgraded 29 Element Sprag with a dual cage design, a High Output Pump Slide Spring, and a 4th Gear Servo Return Spring. The kit is engineered for a complete high-performance rebuild, providing components to enhance line pressure, accumulator pressure, and shift calibration for quick, firm shifts. The Alto Red Eagle clutches offer superior frictional properties and wear characteristics in high horsepower applications. The kit also includes a SunCoast Triple Disc Billet 4L60/65/70E Converter.

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

BrandSun Coast Converters
Part NumberS02K SC-4L60E-CAT2-A

Videos

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