TH700-R4/4L60E Hardened Reduction Sun Shell fits GM 82-Up

TH700-R4/4L60E Hardened Reduction Sun Shell (Bearing & Washer Type) – Compatible for GM 1982-Up

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

The factory reduction sun shell is a notorious weak point in TH700-R4 and 4L60E transmissions — splines strip or twist under torque, destroying the 3-4 clutches and reaction carrier. This upgraded shell features hardened splines for maximum strength, bearing & washer compatibility, and precise fitment — ideal for stock rebuilds, high-horsepower builds, or heavy towing. Drop it in during your next overhaul for bulletproof reliability.

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 damage
• 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 must-have 4L60E hardened sun shell upgrade to your cart today and build it to survive!