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Problem Symptoms Table

WARNING: This page is about a different car, the 2008 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Use the table below to help determine the cause of the problem symptom. The potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Front differential 

FRONT DIFFERENTIAL PROBLEM SYMPTOMS TABLE

Symptom Suspected Area See
Oil leakage from front differential Oil (level too high or wrong grade) DIFFERENTIAL OIL 
Front differential carrier oil seal (worn or damaged) FRONT DIFFERENTIAL CARRIER OIL SEAL (FOR 4WD) 
Front differential side gear shaft oil seal (worn or damaged) FRONT DIFFERENTIAL SIDE GEAR SHAFT OIL SEAL (FOR 4WD) 
Companion flange (loose or damaged) FRONT DIFFERENTIAL CARRIER ASSEMBLY (FOR 4WD) 
Oil leak from front differential drive pinion shaft Oil (level too high or wrong grade) DIFFERENTIAL OIL 
Front differential earner oil seal (worn or damaged) FRONT DIFFERENTIAL CARRIER OIL SEAL (FOR 4WD) 
Companion flange (loose or damaged) FRONT DIFFERENTIAL CARRIER ASSEMBLY (FOR 4WD) 

Rear differential (for 1GR-FE, 2UZ-FE) 

REAR DIFFERENTIAL PROBLEM SYMPTOMS TABLE (FOR 1GR-FE, 2UZ-FE)

Symptom Suspected Area See
Oil leakage from rear differential Oil (level too high or wrong grade) DIFFERENTIAL OIL 
Rear differential carrier oil seal (worn or damaged) DIFFERENTIAL CARRIER OIL SEAL (FOR 1GR-FE, 2UZ-FE) 
Companion flange (loose or damaged) DIFFERENTIAL CARRIER ASSEMBLY (FOR 1GR-FE, 2UZ-FE) 
Oil leak from rear differential drive pinion shaft Oil (level too high or wrong grade) DIFFERENTIAL OIL 
Rear differential carrier oil seal (worn or damaged) DIFFERENTIAL CARRIER OIL SEAL (FOR 1GR-FE, 2UZ-FE) 
Companion flange (loose or damaged) DIFFERENTIAL CARRIER ASSEMBLY (FOR 1GR-FE, 2UZ-FE) 

Rear differential (for 3UR-FE) 

REAR DIFFERENTIAL PROBLEM SYMPTOMS TABLE (FOR 3UR-FE)

Symptom Suspected Area See
Oil leakage from rear differential Oil (level too high or wrong grade) DIFFERENTIAL OIL 
Rear differential carrier oil seal (worn or damaged) DIFFERENTIAL CARRIER OIL SEAL (FOR 3UR-FE) 
Companion flange (loose or damaged) DIFFERENTIAL CARRIER ASSEMBLY (FOR 3UR-FE) 
Oil leak from rear differential drive pinion shaft Oil (level too high or wrong grade) DIFFERENTIAL OIL 
Rear differential carrier oil seal (worn or damaged) DIFFERENTIAL CARRIER OIL SEAL (FOR 3UR-FE) 
Companion flange (loose or damaged) DIFFERENTIAL CARRIER ASSEMBLY (FOR 3UR-FE)