Troubleshooting Auto Transmission

TROUBLESHOOTING BASIC AUTOMATIC TRANSMISSION PROBLEMS

Given proper maintenance and care, the automatic transmission will provide many miles of trouble-free operation. Most minor problems can be traced to fluid level; maintaining the proper fluid level will avoid these problems. Keeping alert to changes in the operation of the transmission (different shifting patterns, abnormal sounds, fluid leakage) can prevent small problems from becoming large ones.



The Problem Is Caused By What Needs to be Done

Fluid leakage Defective pan gasket Have transmission checked 
  Loose filler tube Have transmission checked 
  Loose extension housing to transmission case Have transmission checked 
  Converter housing area leakage Have transmission checked professionally

Fluid flows out the oil filler tube High fluid level Have transmission checked professionally
  Breather vent clogged Have transmission checked professionally
  Clogged oil filter or screen Have transmission checked professionally
  Internal fluid leakage Have transmission checked professionally

Transmission overheats (this is usually accompanied by a strong burned odor to the fluid) Low fluid level Have transmission checked professionally
  Fluid cooler lines clogged Have transmission checked professionally
  Heavy pulling or hauling with insufficient cooling Have transmission checked professionally
  Faulty oil pump, internal slippage Have transmission checked professionally

Buzzing or whining noise Low fluid level Have transmission checked professionally
  Defective torque converter, scored gears Have transmission checked professionally

No forward or reverse gears or slippage in one or more gears Low fluid level Have transmission checked professionally
  Defective vacuum or linkage controls, internal clutch or band failure Have transmission checked professionally

Delayed or erratic shift Low fluid level Have transmission checked professionally
  Broken vacuum lines Have transmission checked professionally
  Internal malfunction Have transmission checked professionally

 

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