General malfunctions of the Toyota Highlander automatic transmission:
1. Kicking, pushing or slipping:
* Worn clutches or steel discs
* Faulty solenoids
*Low or contaminated gear oil level
2. Gear slippage:
* Worn clutches or steel discs
* Damaged torque converter
*Low transmission oil level
3. Gear shift delay:
* Faulty solenoids
* Dirty or clogged oil passages
* Electronic control problems
4. Noise or vibration:
* Worn bearings or gears
* Faulty torque converter
* Damaged driveshaft
5. Switching to emergency mode:
*Severe internal mechanical problems
* Electrical faults
*Low or overheated transmission oil
6. Transmission oil leaks:
* Damaged gaskets or seals
* Cracks in the automatic transmission housing
* Faulty oil cooler
7. Overheating:
* Faulty oil cooler
* Clogged oil channels
* Overloading or towing heavy loads
8. Errors on the dashboard:
* Problems with sensors or wiring
* Malfunction of automatic transmission control module
*Transmission Malfunction Indicator Light (MIL)
Recommended troubleshooting steps:
* Regular transmission maintenance, including transmission oil and filter changes
* Avoid aggressive driving and overloading
* Correct leakage or noise problems immediately
*Use only manufacturer recommended transmission fluid
* Contact qualified automatic transmission service technicians for diagnostics and repairs.