Pinpoint Test E : Transmission Overheating

• Excessive vehicle loads, severe vehicle use 
  • REFER to Owner's Literature for more information about transmission overheating, vehicle loads and vehicle use.

• Incorrect fluid level, condition, or type 
  • CHECK the transmission fluid level and ADJUST as necessary. REFER to: Transmission Fluid Level Check .
  • COLLECT a transmission fluid sample and INSPECT it for debris or contamination. REFER to: Transmission Fluid Level Check .
  • If the transmission fluid has been replaced with anything other than the recommended fluid, DRAIN the transmission fluid and REFILL the transmission with the proper fluid. REFER to: Specifications . REFER to: Transmission Draining And Filling .

• Transmission cooling system damaged, blocked, restricted or installed incorrectly 
  • CHECK the transmission fluid cooler tubes for damage or kinks. Make sure the transmission fluid cooler tubes are properly installed. INSTALL new components as necessary. REFER to: Transmission Fluid Cooler Tubes .
  • CHECK the transmission fluid cooler for damage or bent fins. Make sure the transmission fluid cooler is properly installed. Make sure the cooler and vehicle airflow passages are free of debris or blockage. CLEAN or INSTALL new components as necessary. REFER to: Transmission Fluid Cooler .
  • CARRY OUT the transmission fluid cooler flow test. REFER to: Transmission Fluid Cooler Flow Test .

• Internal transmission concerns 
  • If any other observable symptoms are present, RESOLVE those first. REFER to: Manual Transmission .
  • If the transmission cooling system is operating properly and the overheating concern continues, REMOVE and DISASSEMBLE the transmission. INSPECT the internal components for wear and damage. REFER to: Transmission, Removal . REFER to: Transmission, Disassembly .

Possible Sources 

• Extreme operating conditions
• Incorrect fluid level, type or condition
• Transmission fluid cooler or tubes
• Internal transmission components