Rear differential- viscous coupler making a whirring noise while driving. Toyota rav4 was issued a recall for the same problem. Toyota sienna needs one as well. It is a common failure of the bearing parts.
2013 Toyota Sienna transmission complaints
Page 2 of 2: complaints 11 to 14 of 14, newest first, as owners wrote them.
The rear differential bearing started making a great deal of noise proportional to speed of vehicle. This is a safety problem. Part must be replaced at cost of nearly $3,000. Vehicle only has 65,000 miles and is only 2 months out of warranty. Research I have done reveals that this is a common problem with this vehicle. The dealer had the part in stock, which also suggests that this is a common problem. A recall was done for rav4. A recall should be done for the same issue for the siena.
Rear differential making a growling noise. Was told by toyota that the viscous coupler bearing is bad. Cost to replace coupler is from $1900.00 to $3000.00 dollars. Car only had 115000 mile on it when it started to make noise. Bought a used rear end with 69000 miles on it and again it to is starting to make the same noise at just over 100000. What is up with your rear ends. I can't afford another one. Is there a recall?that rear end is only 1yr. Old. Out off warranty
The viscous coupling on the rear axle of my awd sienna started making noise and needed to be replaced. Apparently there has been a recall for the rav4 for the same part, but not the sienna. My auto shop has told me this is a fairly common problem. The bearings in the coupling fail and start to make a very loud whine. Toyota says the bearings cannot be replaced and must be serviced as a unit... To the tune of $2300 parts and labor.
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