This TransGo
6T70-A SHIFT KIT® Valve Body Repair Kit fits 2007 to 2013 General Motors
vehicles equipped with GEN1 6T70 and 6T75 automatic transmissions.
These transmissions often come in with complaints of erratic shifts, TCC
slip as well as various solenoid performance and gear ratio codes. This kit does not fit GEN2 units.
These complaints are often the result of wear at the actuator feed
limit (AFL) valve bore. The purpose of the AFL valve is to limit the
pressure going to the solenoids. The AFL valve spring is calibrated to
prevent the solenoid feed pressure from exceeding a predetermined PSI,
no matter what main line pressure is. This is necessary to prevent more
fluid from being fed to the solenoids than they can effectively regulate
and limit what max line pressure output is. If the pressure feeding the
solenoids is too high or too low, their output will also be too high or
too low. As a result, shift quality complaints and codes can occur
along with low or high main line pressure. Other issues include TCC
regulator valve bore wear as well as pressure regulator (PR) valve and
bore wear.
Features and benefits:
The kit includes a new drop-in AFL valve system. The furnished
bushing and valve will restore the AFL function using the existing worn
bore. For the TCC regulator valve, a drop-in hardened steel valve with
re-positioned longer land that uses a scarf cut sealing ring so that it
can seal in the original worn bore. Similarly, a new design PR valve
with longer lands restores the function and reliability of the line PR
system. In addition, a new relief system that replaces the OE isolator
valve line-up protects against pressure over boost preventing expensive
hard part damage. Lastly, the kit includes new rubber grommets and
diaphragms to renew the TEHCM pressure switches.
Corrects/Prevents/Reduces:
- Erratic or hunting TCC
- Broken parts due to over boost
- Codes P0741, P0742, P0751, P0752, P0756, P0757, P0776, P0777, P0796,
P0797, P0842, P0843, P0872, P0873, P0877, P0878, P0989, P0990, P2714,
P2715, P2723 and P2724
Includes:
- Drop-in USA-made hardened steel PR valve and spring
- USA-made hardened steel AFL valve
- Drop-in USA-made steel AFL bushing
- AFL valve spring, spacer and retainer
- Drop-in USA-made hardened steel TCC regulator valve
- TCC regulator valve scarf cut sealing ring, spring and O-ring
- Drop-in pressure relief bushing, spring, ball and retainer
- TCC control valve spring and retainer
- (5) Pressure switch diaphragms
- (5) Pressure switch rubber grommets
