Common signs of automatic transmission failure on a Toyota Caldina:
* Slipping: The car accelerates poorly or slips when changing gears.
* Shift delay: The transmission shifts jerkily or with a delay.
* Bumps and jolts: Strong bumps or jolts are felt when shifting gears.
* Grinding or humming: Unusual sounds such as grinding, humming, or vibration are heard.
*Transmission Fluid Leak: Red or brown fluid leaks are visible under the vehicle.
* Inability to shift gears: The transmission does not shift into any gear or only shifts in emergency mode.
* Malfunction indicator lights up: The automatic transmission or Check Engine indicator lights up on the dashboard.
Common causes of automatic transmission malfunctions on Toyota Caldina:
* Worn friction discs: This is the most common cause of slippage and delays when shifting gears.
* Worn torque converter: Can cause slipping, overheating and transmission fluid leaks.
* Contaminated transmission fluid: Dirty fluid can clog the hydraulic system and cause problems.
* Faulty Solenoids: Solenoids are responsible for shifting gears and can fail due to wear or electrical problems.
* Malfunction of the electronic control unit (ECU): The ECU controls the operation of the automatic transmission and may fail due to faulty wiring or internal failures.
* Mechanical damage: This may occur due to overuse, collisions or improper maintenance.
Specific signs of automatic transmission malfunctions on some Toyota Caldina models:
U150/160 (2002-2007):
* Torque converter lockup problem: May cause slipping and overheating.
* Worn input shaft speed sensor: May cause the gears to shift incorrectly and the malfunction indicator light to illuminate.
AT210/240 (2007-2012):
* Worn overrunning clutch: May cause vibration and increased noise.
* Shift Position Sensor Problem: May result in inability to shift gears.