No Forward Engagement, Reverse Okay

Check external and internal shift linkage, TR sensor adjustment, low internal pressure, valve body malfunction (improperly torqued bolts, gaskets and separator plate damaged or positioned incorrectly, manual valve), oil pump assembly (external or internal leakage, gaskets and separator plate damaged or positioned incorrectly, check ball missing), low-intermediate one-way clutch assembly, low-intermediate clutch, oil tubes and seals, low-intermediate accumulator.