C 30 P/U 2WD V8-379 6.2L DSL (1985)
Throttle Valve Cable/Linkage: Description and Operation
THM 350C
Downshift (Detent) Cable System for 350C Transmissions
The detent valve is activated by the downshift (detent) cable which is connected to the carburetor linkage. When the throttle is half open, the detent
valve is actuated, causing a part throttle downshift at speeds below 50 mph (80 km/h). When the throttle is fully opened, the detent valve is actuated
causing the transmission to downshift. The 3-1 detent downshift may be obtained when vehicle speed is approximately 6 to 12 mph (9 to 19 km/h)
below the maximum throttle 1-2 upshift point. The 3-2 detent downshift may be obtained when vehicle speed is approximately 4 to 8 mph (6 to 13
km/h) below the maximum throttle 2-3 upshift point.
