OS TCC/S2/S3/early S4 Regulator Valve
Fits 2015-on 8L45, 8L90
Requires 8L90-REG-TK
- Distributor Part Numbers
- Documents
- General Details
The drop-in version of this regulator valve is included in the TransGo 8L45/90 SHIFT KIT® valve body repair kit. Due to customer request, we now offer it in an oversize option.

Depending on wear, this valve body could use up to 4 of these valves per unit. This oversize TCC/S2/S3/early S4 regulator valve requires 8L90-REG-TK Tool Kit for installation.
Corrects/Prevents/Reduces:
- Harsh, slipping, or missing shifts
- Coast downshift clunks
- TCC shudder or slip
- Transmission control valve errors 2/3/4/7
- TCC P0776, P0796, P2174, P2808 (Stuck Off)
- TCC P0777, P0797, P2175, P2809 (Stuck On)
