Initial Inspection and Diagnostic Overview

PROBLEM SOLVING - TRANSMISSION SHIFT

Quick Reference Fault Chart

Condition(s):
Shift stuck in P
Possible Source(s):
^ Selector cable seized
Action(s) to take:
^ GO to Select Cable Assembly
Possible Source(s):
^ Interlock solenoid not operating
Action(s) to take:
^ GO to PDU
Possible Source(s):
^ Interlock latch seized
^ Transmission faulty
Action(s) to take:
^ Mechanical check
Possible Source(s):
^ Operator sequence error
Action(s) to take:
^ Correct the sequence

Vehicle rolls on P
Possible Source(s):
^ Incorrect cable adjustment
Action(s) to take:
^ GO to Select Cable Adjustment
Possible Source(s):
^ Faulty parking pawl (transmission internal)
Action(s) to take:
^ Mechanical check
R does not engage
Possible Source(s):
^ Incorrect cable adjustment
Action(s) to take:
^ GO to Select Cable Adjustment
Possible Source(s):
^ Transmission fluid level incorrect
Action(s) to take:
^ GO to Transmission Fluid Drain/Refill
N not achieved
Possible Source(s):
^ Incorrect cable adjustment
^ Transmission faulty
Action(s) to take:
^ GO to Select Cable Adjustment
D does not engage
Possible Source(s):
^ Incorrect cable adjustment
Action(s) to take:
^ GO to Select Cable Adjustment
Possible Source(s):
^ Transmission fluid level incorrect
Action(s) to take:
^ GO to Transmission Fluid Drain/Refill
Possible Source(s):
^ Transmission faulty
Action(s) to take:
^ Mechanical check
Lower ratios will not hold
Possible Source(s):
^ Excessive engine temperature
^ DLS fault
Action(s) to take:
^ GO to PDU
Shift lever position not visually correct
Possible Source(s):
^ Incorrect cable adjustment
Action(s) to take:
^ GO to Select Cable Adjustment
Shift lever has no effect upon the transmission & resistance cannot be felt
Possible Source(s):
^ Cable disconnected or broken
^ Transmission selector problem
^ Shift lever drive pin adrift
Action(s) to take:
^ Mechanical check
Shift lever position not align correctly following manual selection of lower ratios
Possible Source(s):
^ Sliding block drive pin displaced - following road debris contact
Action(s) to take:
^ Mechanical check. Renew the selector if damaged, or re-align the drive pin & sliding
Shift lever detent indistinct in 3 causing poor location
Possible Source(s):
^ DLS detent fault
Action(s) to take:
^ GO to Renew the DLS
Shift may be moved from P without brake pedal operation.
Possible Source(s):
^ Interlock latch fault
Action(s) to take:
^ Mechanical check
Possible Source(s):
^ Solenoid permanently activated
Action(s) to take:
^ GO to PDU
Engine may be started in positions other than P or N
Possible Source(s):
^ Incorrect cable adjustment
^ DLS fault
Action(s) to take:
^ GO to Select Cable Adjustment
Shift lever vibration
Possible Source(s):
^ Loose selector assembly
^ Cable isolation fault
Action(s) to take:
^ Mechanical check
Noise/ rattle from 'J' gate
Possible Source(s):
^ Debris in the mechanism
Action(s) to take:
^ Clean
Possible Source(s):
^ Worn 'J' gate track gasket allowing lever & moulding to contact
^ Loose selector disc seal
Action(s) to take:
^ GO to Gear Shift Assembly (J-Gate) - Strip and Rebuild.