- Off-Highway Truck:
- 793C (S/N: 4AR1-UP; ATY1-UP; 4GZ1-UP)
- 793C XQ (S/N: CBR1-UP)
Reference: Service Letter, PI30005, "A New Spring for Torque Converter LUC Valve Needs to be Installed In Certain 793C Trucks"
The new 187-0951 Lockup Clutch and Synchronizing Valve is standard for 793C Off-Highway Trucks. The new lockup clutch and synchronizing valve was effective with 793C (S/N: ATY1) Off-Highway Truck and with 793C XQ (S/N: CBR1) Off-Highway Truck. The new 187-0951 Lockup Clutch and Synchronizing Valve replaced the former 8E-6146 Lockup Clutch and Synchronizing Valve. A 8E-6146 Lockup Clutch and Synchronizing Valve may be configured as a 187-0951 Lockup Clutch and Synchronizing Valve by replacing the 8E-6144 Spring with a 6Y-7268 Spring. 8E-6146 Lockup Clutch and Synchronizing Valve was announced in Service Letter, PI30005, "A New Spring for Torque Converter LUC Valve Needs to be Installed In Certain 793C Trucks".
Note: 8E-6146 Lockup Clutch and Synchronizing Valve is used on other models of trucks. Mark any modified 8E-6146 Lockup Clutch and Synchronizing Valve in order to avoid confusion with a standard 8E-6146 Lockup Clutch and Synchronizing Valve.