Toyota Sienna owners have reported 3 problems related to transmission slip out of gear (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.
The car was driven normally in gear "d" at 35 mph but slipped out of gear for no reason. I stopped, put in park, turn off the engine, waited a few minutes and restarted the car. It would then only work in gear "3" but I had to floor the gas pedal. After stopping multiple times, I was able to reach home. My 2008 Sienna can now be driven forward in reverse gear.
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Joining highway in a situation where vehicles giving way cause hesitation and then give way causing braking then acceleration repeatedly, transmission refused to downshift on kick down, vehicle would not accelerate, actually slowed significantly forcing following vehicles to brake . Vehicle eventually began to pick up speed. Generally poor response from transmission in all modes. Transmission drops out of drive at low speeds causing engine to race before taking up drive,
very hard to operate vehicle smoothly. . Excessive engine vibration and noise for this price point ,known more refined diesels
knocking from steering column on constant radius turns when making small steering corrections, detectable at low and moderate to high speed.
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Once, while driving on I-5, on a slight incline in 'd'(overdrive), I slowed the vehicle from 60 mph to around 50 mph because of traffic. The vehicle then seem to slip out of gear, the rpms hit approx. 6000, then the vehicle caught a gear. It repeated this several times. I pulled over and call the dealer. He said to if there were no warning lights, then it's probably ok. The second time we were in 'd' and slowing from about 60mph to 50mph coming into a slight corner. The vehicle repeated the same jerking. I notice that when slowing the rpms dip below 2000-1800 before the slipping occurs. I kept the car above 2000 rpms at higher spends by shifting into '3' when needed. This seem to avoid the problem?
we brought the car in to the dealer. I was told what happen is normal operation for the new transmissions in the Sienna and highlander? however, losing power and being jerked around did not seem safe. I am bringing it to another dealer on this coming Friday.
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all problems of the 2004 Toyota Sienna
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