Not Shifting Into Overdrive? - Toyota Nation Forum : Toyota Car and Truck Forums
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#1 Old 07-13-2007, 04:18 PM
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Not Shifting Into Overdrive?

First post!

I've inherited my parents 91 LE and it's been good to the family for the most part. I've started my own so they handed it down to me. The van for the most part runs great. It only has 168K miles on it. In the morning or basically when the engine is cold, it doesn't want to shift into overdrive. Depending on the weather, it'll finally shift into overdrive. Like it's waiting to warm up. Not sure why it's doing it now....any idea?

Thanks in advance
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#2 Old 07-13-2007, 10:46 PM
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That is perfectly normal. Toyota programs their computers to keep the transmission out of overdrive until the engine reaches a certain temperature, and therefore runs more efficient. In the long run, it reduces emissions by allowing the catalytic converter to heat up more quickly.

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#3 Old 07-13-2007, 11:52 PM
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gideon thanks for the response. I have a feeling that I have a sticky thermostat. it takes a while for the van to warm up. I was just hoping nothing was wrong with the tranny
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#4 Old 07-14-2007, 12:13 AM
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The O/D system engages after say 165F. If the engine is taking longer to warm up, the O/D was be cut out longer.
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#5 Old 07-14-2007, 12:37 AM
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yah I think its the thermostat for sure, again it'lll take a while to warm up but it'll get into OD eventually
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#6 Old 07-15-2007, 07:20 PM
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When it is say, 75 degrees out, it'll take my dad's Previa 2-3 miles to go into overdrive. The lower the temp the longer it takes. Sometimes up to 5 miles in the winter.

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