just have my 98 tranny rebuilt . he change out all clutch 3 shift selnoid new t/c and clean out the valvebody. from first to second gear it shift rought then after that then it smooth but from 4 gear to third on the hwy it feel like it is slipping or feel like it dont know what it what to shift to.

 

anyone have any ideas

 

Did you use the alignment tool?? That could be one of the problem.

 

why would you possibly need to use an alignment tool on an auto trans? please enlighten me on this one, i would like to know.

back to the original post, check the trans fluid, make sure it's full and also is your D light flashing?

 

what a d light flashing