Transmission Shift Problems
 

Hi All

I have a 2000 Montero Sport 2wd 3.0L Auto Trans. While it is cold it will shift fine and stay in all gears. Once it reaches operating temperature, the transmission jerks hard and goes back into what I believe is 2nd gear. I have done an fluid and filter change with OEM fluid and filter. I was wondering if anyone else has had this issue and if any of you know how to fix it.

Thanks for your time.

First a very obvious question - what is your fluid level? When it downshifts to 2nd, will it up-shift again or not at all?