TH700-R4/4L60E/4L65E Hardened Reaction Sun Shell fits GM

Stellar Automotive Group TH700-R4/4L60E/4L65E Hardened Reaction Sun Shell (Bearing Type) – Compatible for GM 1982-Up

Eliminate reaction sun shell spline twist, 3-4 clutch failure, and expensive rebuilds with this heavy-duty hardened reaction sun shell from Stellar Automotive Group.

The factory reaction sun shell is a notorious weak link in TH700-R4, 4L60E, and 4L65E transmissions — splines strip or twist under torque, destroying the 3-4 clutches and reaction carrier. This upgraded bearing-type shell features hardened splines for maximum strength, precise bearing compatibility, and improved durability — ideal for stock rebuilds, high-horsepower builds, towing, or aggressive driving.

Perfect fit for popular models including:

• Chevrolet Camaro, Corvette, Silverado, Tahoe, Suburban
• GMC Sierra, Yukon
• Cadillac Escalade

Common symptoms this upgrade resolves/prevents:

• Sudden loss of 4th gear
• 3-4 clutch slip or flare
• Reaction carrier spline stripping/breakage
• Catastrophic transmission failure under load

Easy installation – replace during unit rebuild. Professional installation recommended.

Note: All parts are distributed, not designed or manufactured, by Stellar Automotive Group.

Add this heavy-duty hardened reaction sun shell to your cart today and make your 4L60E stronger than stock!