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Problem Symptoms Table

WARNING: This page is about a different car, the 2005 Toyota Sienna and 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

Use the table below to help find the cause of the problem. The numbers indicate the likelihood of the cause in the descending order. Check each part in the order shown. Replace these parts as necessary.

PROBLEM SYMPTOMS TABLE - DIFFERENTIAL SYSTEM

Symptom Suspect Area
Oil leak from rear differential
  1. Oil level (Too high or wrong grade)
  2. Rear differential front oil seal (Worn or damaged)
  3. Side gear oil seal (Worn or damaged)
  4. Companion flange (Loose or damaged)
  5. Side gear shaft (Damaged)
Oil leak from drive pinion shaft
  1. Oil level (Too high or wrong grade)
  2. Rear differential front oil seal (Worn or damaged)
  3. Companion flange (Loose or damaged)
Oil leak from side gear shaft
  1. Oil level (Too high or wrong grade)
  2. Side gear shaft oil seal (Worn or damaged)
  3. Side gear shaft (Damaged)
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