GM 4L60E and 65E      Kit: 4L60E PSK   Automatic Shifts
4 Speed Rear Drive              Kit: 4L60E-S PSK   Stick Shift

1993 to 2005:  4.3 to 6.0  Cars, Trucks, Vans. 

Features: Pro-Street or Race with Class:  Manually holds 1st-2nd-3rd to any RPM. Manually downshift to any gear at any speed with selector.  Reduces lockup complaints and blinking engine light.       Reduces clutch and band failure.

4L60E-S Stick Shift: Has vacuum modulator. All shifts are made by moving selector. No shifts are automatic. No computer is used. 
Great for transplants.