Hello,

I've got a '92 4runner automatic. When it's cold it won't drop into overdrive on the highway for up to a minute. Is this common? I don't remember it doing that in the past, but was it designed not to until the engine is warm? Is the overdrive somehow connected to the thermostat?

Thanks for the help and I can provide more details if they are needed.

 

Both my '97 3.4 and my old '95 3.0 did that. I always figured it was designed to let the engine warm up before O/D could be used.

 

A quick search would have wielded you with a recent thread about the same thing.....

Yes. Its common. Overdrive won't kick in until up to operating temperatures and above 35mph. even if your gauge reads operating temp, doesnt meant your engine actually is.

 

https://www.yotatech.com/forums/f116...e-cold-200943/
Here this might help you.

 

Thanks for your help! I'll go to the store tomorrow and get a new tstat and hopefully that will make it work better.