ok so this problem started a couple months ago and it only occurs on the highway going about 70-75mph and lasts usually only a couple mins. when driving at 70 my rpm's are almost dead center on 2000rpm, but every now and then while keeping a constant pressure on the gas the rpm's shoot up to around 2500-2700rpm's and lasts for maybe 5 mins at the most then go back to the norm 2000rpm. its done this with my foot on the gas and also when in cruise and while driving on a flat highway with little wind outside(not any ridiculus headwinds or strong wind gusts) the last long trip i took(270+mi one way) this problem kicked up twice on the way down and once on the way back.

 

Sounds exactly like the torque converter unlocked. It is just very odd that it would stay unlocked for 5 minutes... It could be that you were just at the right throttle angle to be in between whether the TCC should be unlocked or locked...

 

so is this something to worry about or just an annoying occurance?

 

Are you sure you weren't accidently touching the brake pedal? Activating the brake light circuit will unlock the converter.

 

unless i hit the brake pedal without knowing, but i really done think i did and when im in cruise i have the heels of my feet close to the seat so there would be no way of hitting the brake that way.

 

so does this mean theres something wrong with the tranny?? or is it just an annoying quirk??

 

I cannot find anything that resembles this problem in my references... I would monitor it and see if it gets worse.

 

alright ill keep an eye on it as of now it doesntseem to cause any problems (power loss etc.) but ill update if/when there is a change. thanks for the time and input guys.

 

One more question, can you get it to lock up again if you speed up, then settle back down to your previous speed again?

 

yea if i speed up to about 75-80mph then go back to 70 the rpm's go back to the norm 2000.