ms0115
Senior Member
2011 Navistar 7500
VIN: 1HTWNAZTSCJ549743
Maxx Force 10
When driving this truck it would lock up into forward gear, the driver believed it to be 4th gear. It would not up ship or down shift or go into reverse. It has an active pressure 1 (PS1) code. Dropped the valve body, the fluids and filters look good. Changed the switch and the same issue persist. Any recommendations or testing procedures would be appreciated
VIN: 1HTWNAZTSCJ549743
Maxx Force 10
When driving this truck it would lock up into forward gear, the driver believed it to be 4th gear. It would not up ship or down shift or go into reverse. It has an active pressure 1 (PS1) code. Dropped the valve body, the fluids and filters look good. Changed the switch and the same issue persist. Any recommendations or testing procedures would be appreciated