1990 Mazda B2600 SE-5 4 Cyl 2.6L
Transmissions & Drivetrains
I have the 5 speed, won't shift in 5th gear or reverse
My tranny won't shift in fifth gear or reverse
Nissan Technical Advisor 10/5/2010
Check the fluid for proper level and inspect the shift linkage, maybe it's binding. Or your clutch is not disengaging from your flywheel, or clutch itself is defective.