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Engagement Concern: No Reverse

ENGAGEMENT CONCERN: NO REVERSE - DIAGNOSTIC ROUTINES

Possible Component Reference/Action
202 - ELECTRICAL ROUTINE 
Powertrain Control System   
  • No electrical concerns
302 - HYDRAULIC/MECHANICAL ROUTINE 
Transmission Fluid Level   
  • Low transmission fluid level
  • Transmission fluid condition
Selector Lever Linkage (Internal/External)   
  • Damaged or out of adjustment
Incorrect Pressures   
  • Line pressure, Line Pressure Control (LPC) pressure - low
  • Carry out Line Pressure Tests and Stall Speed Tests. Refer to SPECIAL TESTING PROCEDURES . Check pressure at line pressure tap. See the Line Pressure Chart  for specifications. If pressures are low, check the following possible components:
    • Main control valve body
    • Pump assembly
    • Low/reverse clutch assembly
    • Direct clutch assembly
    • Shift Solenoid B (SSB), Shift Solenoid D (SSD) and Shift Solenoid E (SSE) solenoids
Main Control Valve Body   
  • Bolts out of torque specification
  • Tighten bolts to specification.
  • Gasket and separator plate - damaged, off location
  • Inspect for damage. Install new as required.
  • Manual control valve, springs - stuck, damaged
  • Inspect for damage. Install new as required.
  • Multiplex valve, springs - stuck, damaged
  • Inspect for damage. Install new as required.
  • Low/reverse clutch valve, springs - stuck, damaged
  • Inspect for damage. Install new as required.
  • Direct clutch valve, springs - stuck, damaged
  • Inspect for damage. Install new as required.
Pump Assembly   
  • Bolts out of torque specification
  • Inspect for damage. Install a new pump as required.
  • Porosity/cross leaks, pump assembly leaking, plugged hole
  • Inspect for damage. Install a new pump as required.
  • Components damaged
  • Inspect for damage. Install a new pump as required.
Low/Reverse Clutch Assembly   
  • SSD  solenoid stuck low
  • Low/reverse regulator valve stuck
  • Inspect for damage. Repair as required.
  • Seals, piston, springs - damaged
  • Inspect for damage. Repair as required.
  • Clearance check out of specification
  • Inspect for damage. Carry out clearance checks.
  • Friction elements - damaged or worn
  • Inspect for damage. Repair as required.
Direct Clutch Assembly   
  • Seals, piston, spring - damaged
  • Inspect for damage. Repair or install new as required.
  • SSB  solenoid
  • Direct clutch regulator valve
  • Inspect for damage. Repair or install new as required.
  • Clearance check out of specification
  • Inspect for damage. Carry out clearance checks.
  • Friction elements - damaged, clearance check incorrect
  • Inspect for damage. Repair as required.