Long shifts are a hydraulic pressure problem (lack of).
This could be a TV cable out of adjustment (if equipped) or a vacuum/shift solenoid problem.
Modern automatics are very complicated and my best advice is to take to trans shop for diagnosis. Low hydraulic pressure will eventually cause it to slip, once that starts, you are looking at replacing trans.
Find a local family owned shop with ASE mecahnics, BBB certification, avoid chains.
Friday, December 4th, 2009 AT 8:38 AM