AT : Delayed shifting when starting up.

[nrgetic99]

My 98 Ltd has 150k on it. Tranny fluid is new (drain and refil, not powerflush) within the last 3 months.

In the mornings (it is not cold yet, roughly 65* ), tranny takes a long time to shift up.
It used to shift into top at the top of my street, now it takes another mile or so although I can coax it to shift on occasion by getting out of the gas rapidly.

I am aware there is a temp sensor and I alos recall reading a similar thread many moons ago but cannot locate it.

Is the AT temp switch my most likely culprit ???

David.

P.S> Got some nice pics I am getting ready to post of my low cost on board air set up :thumbup:

[04 Rocko Taco]

Well, it will hesitate and hold 1st gear longer when it is colder, to get engine temps up. Thats just a fact, if it holds gear logner now than before, it coupld possibly just be colder, but could also be a temp sensor.

[nrgetic99]

Thanks for your comments. This is my 5th 4runner so I am well used to the tranny's shift patterns. This is a fairly recent step change in the delay in shifting into top and it has happened when the air temps are over 75* in the morning.

I am going to reset the Tranny ECM in case it has 'learned' this behaviour for some reason as I really don't want to replace the temp switch if it is not necessary.

David

[04 Rocko Taco]

Try pulling the neg cable for a few minutes, and then just hooking it back up, the ECU will forget what it has learned, and maybe it will forget this. :)