Transmission Fluid Leaking Problems of Toyota Sienna

Toyota Sienna owners have reported 4 problems related to transmission fluid leaking (under the power train category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Toyota Sienna based on all problems reported for the Sienna.

car image   Transmission Fluid Leaking problem of the 2004 Toyota Sienna 1
Failure Date: 03/27/2015

Radiator failure resulting in coolant leakage in the transmission fluid and transmission is failing. I noticed my 2004 Toyota Sienna had some belt noise that got worse. The van was due for a water pump/timing belt change. Later the engine temperature gauge read high and after checking the fluids noticed the antifreeze level to be low and topped it up. A week later while driving on the highway steam started coming out of the hood. I noticed the pink fluid had also leaked out of a tube (looked like a relief tube) on the driver side. Radiator level was low. The transmission fuel looked pinkish and read about six inches above the max level on the dipstick. Trans fluid was milky pink, thick, and had grainy deposit. Took the van to the autoland dealer in springfield, NJ to diagnose the problem and to have the water pump and timing belt change at the same time. Had to leave the van overnight. I picked up the vehicle with a nearly $2000 bill for repairs (brakes, tire rotation, timing belt and water pump) other than changing the trans. Fluid or telling me what was wrong. Dealer said someone put additive to the fluid???. Note that only autoland had been servicing the vehicle. They refused to change the trans fluid. "I am not touching that. " the dealer said. I now know from a local trans repair shop that the radiator was leaking coolant into the trans fluid. A known problem with radiators on Toyota vehicles that had a recall. I never received notice of the recall. I now have an estimated $4,000 problem to replace the radiator and transmission that could have been prevented if autoland had done its job properly and not refused to change the trans. Fluid. I am very disappointed with Toyota and with autoland's service.

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car image   Transmission Fluid Leaking problem of the 2004 Toyota Sienna 2
Failure Date: 09/13/2004

While merging onto another lane transmission down shifted on its own. Consumer applied the accelerator pedal and vehicle would not accelerate. Then, consumer noticed that the rpm gauge registered high on the dashboard. Consumer took vehicle to dealer for inspection, and mechanic determined that transmission fluid was leaking from underneath, and needed to be replaced. The other problem could not be duplicated by the mechanic. Consumer informed mechanic that this problem recurred and had not been resolved.

car image   Transmission Fluid Leaking problem of the 2002 Toyota Sienna 3
Failure Date: 10/07/2003

I had bought my van may 2,2003 with about 19,000 miles. On October 7, while driving about 30 mph, the vehicle started smoking. When I pulled into a parking stall, passerbyers were yelling that my car was on fire. Fire department extinguished the flames. An independent arson investigator said he found transmission fluid in the engine, and that it had probably been leaking since I purchased my van.

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car image   Transmission Fluid Leaking problem of the 2000 Toyota Sienna 4
Failure Date: 01/24/2003

Fluid leak around the transmission pan gasket. Repaired 3 times by 2 different Toyota dealers. Easy job but maybe it is a deeper problem? transmission did not shift when cold for about 2 miles after the first and second time it was "fixed. " after the third time trying to stop the oil leak, they adjusted the throttle cable and now it seems to shift more normally in cold mornings. Since new, the left sliding manual door was hard to open from the inside. After 2 trips for "adjustments" the door is opening correctly.

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