No Engine Braking In All Manual Ranges

Low line pressure. 3-4 shift valve stuck in 4th gear position. Manual valve and linkage misaligned. Misaligned, loose or restricted valve body, gaskets and spacer plate, channel plate and gasket, and driven sprocket support. Driven sprocket support seals leaking or input shaft seals leaking. Input shaft bushing damaged or misaligned. Coast clutch piston binding, cracked or leaking.

Clutch friction plates worn or splines broken. Coast clutch release spring binding. Direct and coast clutch housing damaged, cracked or fluid feed holes restricted. Direct and coast clutch housing exhaust check ball missing or out of position. Fluid leak or restriction in coast clutch fluid routing.