Our Gear Train Module contains the hard parts to add brute strength to your 700R4 or 4L60E transmission. If
your vehicle is rated more than 350 horsepower you need this upgrade. This is a complete gear train upgrade to handle the abuse
endured by high performance vehicles. The one additional planetary gear adds more torque handling capability to your transmission.
We only offer the factory ACdelco 5 pinion planets because of thier superior quality. We have included the new style hub and bearing
in this kit. This hub and bearing are necessary for proper fit of the input planetary. To
reinforce the input drum a Sonnax reinforcement ring is necessary. This ring is pressed over the overrun piston area of the input drum.
This is where the input shaft is splined to the aluminum drum. This is a weak area of the drum and must be reinforced to withstand the higher
torque of modified or nitrous engines. A modified overrun piston is included and must be used with this ring.
Trutech ACdelco 5 Pinion Front and Rear Planetary Set for High Torque Applications:
Sonnax Smart Shell, great for high horse power applications:
Complete with all necessary ACdelco Torrington bearings:
Sonnax reinforcement sleeve kit to prevent drum failure:
No Modification necessary:
Necessary for all applications over 350 HP:
Replaces failure prone thrust washers with Torrington Bearings in crucial areas: