Diesel Data
: Automotive Repair
Home
>>
Chevy Truck
>>
1989
>>
C 2500 Truck 2WD V8-305 5.0L
>>
Repair and Diagnosis
>>
Transmission and Drivetrain
>>
Automatic Transmission/Transaxle
>>
Description and Operation
>>
3L80/3L80HD (400/475) Automatic Transmission
>>
Hydraulic System, Brakes
>>
Functions of Valves & Hydraulic Control Units
>>
1-2 Detent Valve
1-2 Detent Valve
Senses regulated modulator pressure tending to hold 1-2 shift valve downshifted and provides an area for detent pressure for detent 2-1 shifts.