Powertrain
generic / SAE
P07D8
Unable To Engage Gear 8
The TCM commands a shift to 8th gear but the gear-ratio measurement does not confirm engagement — friction element does not lock up, slipping clutch, or shift solenoid does not respond. Falls back to the previously engaged gear.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number7 / D8
Possible causes
- Solenoid stuck closed high
- Slipping clutch in 8th gear element medium
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–3000 €
- Estimated time: 2–10 h
- Component: shift solenoid
- Component: clutch pack
- MIL / check engine light
Sources
References
sae:J2012