Transmission take a while to shift.

[mobsterk]

I own a 92 4runner, 3.0 4 wheel drive automatic.. when i drive the truck all the gears go in fine EXCEPT for the last gear.. it takes about 10 minutes to kick it...it drives at 4000 rpm to 4500 rpm, it usally takes about 10 minutes or so, once it it kicks in it runs perfect, and it only does it when the car cools down. any one had the same problem?? and what could it be?? please help!

 

[Saved]

The reason for that is the transmission oil has to warm up to allow the sensor to make the final shift into OD.

 

[digemz]

The reason for that is the transmission oil has to warm up to allow the sensor to make the final shift into OD.

i agree.. i have the same "issue" and it appears to be fine. If the tranny fluid is cold it doesnt shift into OD.. I thought it was a problem but its not too big a deal 4real 4real. Havent checked yet.. but low tranny fluid might be the cause of this as well..but its an older vehicle.. remember the good ol' days when people warmed up their vehicles.. this may have been one of "those" trucks.. feel me?

-->dean

 

[mobsterk]

i agree.. i have the same "issue" and it appears to be fine. If the tranny fluid is cold it doesnt shift into OD.. I thought it was a problem but its not too big a deal 4real 4real. Havent checked yet.. but low tranny fluid might be the cause of this as well..but its an older vehicle.. remember the good ol' days when people warmed up their vehicles.. this may have been one of "those" trucks.. feel me?

-->dean

yeah i remeber those days, cus i have a 51 chevy and you have to warm it up.. but a 92 4runner i dont think it should take 10 or 15 minutes to warm up.. i check the fluid and is full..:ybrick:

 

[RockinRunner]

I'm having similar problems. I live in Reno and it's pretty cold. However, the last few days have been quite warm and my transmission has been shifting flawlessly. I believe that the cooling system is the culprit. Try getting a toyota thermostat and flushing your cooling system.

Also do some research and see when you had your timing belt & waterpump done last. If you're unsure, DO IT! This is good preventative maintenance and will ensure reliability on the road.

 

[BucknutBob]

It's all good

yeah i remeber those days, cus i have a 51 chevy and you have to warm it up.. but a 92 4runner i dont think it should take 10 or 15 minutes to warm up.. i check the fluid and is full..:ybrick:

Just a quick reminder: you're talking about transmissions, not the engine. Your engine is probably warming up just fine, but the transmission takes longer because there isn't any hot water running through it, or high-speed parts flying back and forth inside. The wait before the OD kicks in is fairly common in these trucks, and it is heat-related. My '94 did the same thing. :frog:

 

[DC runner]

It isn't a problem, unless the wrong spec'ed thermostat is in the cooling system and the system is not allowed to heat to spec temperature.

The engine/cooling system must reach normal operating temperature before the transmission is allowed to shift into overdrive.


Takes longer when cold. If, once at operating temperature, the vehicle shifts into and out of O/D; then it is operating normally. It is called overdrive temperature lockout.

I have no idea why they have designed it like that, but I can tell you that many manufacturer did it; so there must be a reason. It could be due to performance or the desire to get the vehicle up to temp as fast as possible..

Not sure, but it is normal for the OD to refuse to engage until up and running.