* Problem: The transmission fluid level is low.
* Solution: Check the transmission fluid level and add fluid if necessary.
Dirty transmission fluid:
* Problem: The transmission fluid is dirty or contaminated.
* Solution: Change the transmission fluid and filter.
Faulty transmission shift solenoid:
* Problem: One or more of the transmission shift solenoids are faulty.
* Solution: Replace the faulty shift solenoid(s).
Faulty transmission control module (TCM):
* Problem: The TCM is faulty.
* Solution: Replace the TCM.
Worn-out transmission clutch packs:
* Problem: The clutch packs in the transmission are worn out.
* Solution: Rebuild or replace the transmission.
Malfunctioning torque converter:
* Problem: Torque converter is not functioning properly.
* Solution: Replace torque converter.