4L60E 4L65E Performance pack contains a .490" OD Boost valve with sleeve, servo piston D-Ring kit, pressure regulator spring, 4th servo spring, 3-4 accumulator piston kit, forward accumulator kit, 1-2 pinless accumulator piston kit.
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4L60E-HD2 Transmission performance reprogramming kit.
Holds 1st, 2nd, and 3rd at any RPM. Backshifts to 3rd, 2nd and 1st at any RPM.
1998 and newer may require TORQUE MANAGEMENT MODIFICATION.
Designed for the professional mechanic.
Comes with complete, easy to follow instructions.

4L60E Transmission performance reprogramming kit
Stick shift, full manual control, (converts back to automatic),
holds 1st, 2nd, and 3rd at any RPM.
Backshifts to 3rd, 2nd and 1st at any RPM.
For transplant or use with non electrical application.
Also order 46-MOD. Comes with complete, easy to follow instructions.
Designed for the professional mechanic.

700R4 4L60E Transmission Kevlar lined power band 2 5/8" wide.

700R4 4L60E transmission band, Kevlar lined band, 2.28" wide.

700R4 4L60E Transmission Power Band, Red lined, 2 5/8" wide

High energy power band 2.5/8" wide.