Tranny Trouble
#2
P0731
Possible Causes:
Code P0731(51) - Excludes geartrain failures which should be obvious upon disassembly
> If code P0944(35) is also set, follow diagnostic procedure for code P0944(35) first
> Valve body - #1 ball check or LR switch valve sticking - may also set code P-0736(56) or have no Reverse
> Speed sensor or associated wiring - may also set codes P0736(50), P0715(56), or P0720(57)
> Failed or intermittent slipping UD clutch - may also set P0732(52), or P0733(53)
– UD seal leakage (intermittent)
– Worn input clutch hub bushing (hard code at heavy throttle)
– Sticky UD accumulator seals (intermittent)
– Worn reaction shaft support seal rings (hard code at heavy throttle)
– Solenoid pack (UD pressure in 4th gear)
> Failed or slipping LR clutch - may also set code P0736(56) or have no Reverse
– LR seal leakage (Intermittent)
– Sticky LR accumulator seals (Intermittent)
Possible Causes:
Code P0731(51) - Excludes geartrain failures which should be obvious upon disassembly
> If code P0944(35) is also set, follow diagnostic procedure for code P0944(35) first
> Valve body - #1 ball check or LR switch valve sticking - may also set code P-0736(56) or have no Reverse
> Speed sensor or associated wiring - may also set codes P0736(50), P0715(56), or P0720(57)
> Failed or intermittent slipping UD clutch - may also set P0732(52), or P0733(53)
– UD seal leakage (intermittent)
– Worn input clutch hub bushing (hard code at heavy throttle)
– Sticky UD accumulator seals (intermittent)
– Worn reaction shaft support seal rings (hard code at heavy throttle)
– Solenoid pack (UD pressure in 4th gear)
> Failed or slipping LR clutch - may also set code P0736(56) or have no Reverse
– LR seal leakage (Intermittent)
– Sticky LR accumulator seals (Intermittent)