Product Description
Fits: GEN1 6T30 / 6T40 / 6T45 · 2007 to 2012
TransGo 6T40 SHIFT KIT valve body repair kit for 2007 to 2012 GM vehicles with GEN1 6T30, 6T40 and 6T45 automatic transmissions. It targets soft or flared shifts, burned friction plates, TCC slip and solenoid and gear ratio codes caused by valve body wear.
Specifications
| Fits | 6T30, 6T40, 6T45 |
|---|---|
| Years | 2007 to 2012 |
Why they fail
Most of these complaints come from wear at the actuator feed limit (AFL) valve. Its spring is calibrated to keep solenoid feed pressure below a set PSI no matter what line pressure is, so the solenoids are not fed more fluid than they can regulate and maximum line pressure stays limited. When feed pressure is too high or too low, solenoid output follows, causing shift quality complaints, codes and low or high line pressure.
Wear at the spring end of the pressure regulator valve or bore, the EPC boost signal area, loses EPC boost signal oil. The result is lazy pressure boost response, low line pressure, clutch slippage and solenoid performance and gear ratio codes. The TCC regulator valve bore also wears, causing TCC slip and codes.
A drop-in AFL valve system (bushing, valve, spring, spacer and retainer) restores AFL function in the existing worn bore. A drop-in hardened steel TCC regulator valve has repositioned, longer lands and a scarf-cut sealing ring that seals in the original worn bore. A new PR valve with longer lands restores the line pressure regulator system. New O-rings and diaphragms renew the TEHCM pressure switches.
Corrects or reduces: erratic or hunting TCC, soft shifts or flare on shifts, burned friction plates and slow pressure boost response. Codes: P0741, P0751, P0752, P0757, P0776, P0777, P0796, P0797, P0842, P0843, P0872, P0873, P0877, P0878, P0989, P0990, P2714, P2715, P2723 and P2724.
What's included
- 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 (for sizing only)
- (4) Pressure switch diaphragms
- (4) Pressure switch O-rings
Notes
This kit does not fit GEN2 units.
This kit does not fit GEN2 units.
