Product Description
400-PRO TransGo Reprogramming Kit TH M 400 375 425 3L80 3L80HD 1965-on "Final Answer"
This Is A TransGo Reprogramming 400-PRO Kit For These GM Automatic Transmissions: 
- 400 - TH400 - THM400
 - 375 - TH375 - THM375
 - 3L80
 - 475 - TH475 - THM475
 - 3L80HD - 3L80-HD
 
This Kit Will Work On All The Above Transmissions 1965-up. 
This Kit Will Give You These Features,
Final Answer For This Great Trans.
Pro-race—heavy Duty—super Show Off.
- Awesome Capacity With Adjustable “classy” Shifts.
 - Holds Any Gear To Any RPM And Backshifts With The Lever To Any Gear At Any Speed.
 - Has Case Protecting Snap Ring And Alum 2-3 Accumulator Piston.
 
Features:
- Automatic shift
 - Street or full-race
 - Holds 1st and 2nd to any RPM
 - Back-shifts to 2nd and 1st at any RPM
 - Tow&Go™, competition, pro-race, heavy duty, show-off
 - Awesome capacity with adjustable shift timing and feel
 
Also Includes:
- (2) different size 1-2 shift valves
 - Direct clutch high rate return springs
 - Heavy duty intermediate pressure plate snap ring
 - 3rd clutch dual feed separator plate
 - Shift feel and calibration components
 - 2-3 aluminum accumulator piston
 
This Kit Is A Must For Any Muscle Car, RV, 4x4 Or Daily Driver To Add Crisp Shifts And Extreme Durability To Your Vehicle.
Box May Be Different Then Picture.