6L80E / 6L90E Rear Planetary assembly with a 4140 HTSR billet steel drive plate. #623101
6L80E 6L90E Rear Planetary. TCS has redesigned the O.E. rear planetary assembly with a 4140 HTSR billet steel drive plate to eliminate spline/housing failure. The new drive plate is milled and contoured to the planetary housing to eliminate any possible separation when under load. There will be a $200.00 core charge added. The core must have good gears.