It just acts like a 3 speed, no sign of 4th at all, fluid is fairly new and still reddoes it go into 4th and then nothing? does it slip in and out? check your fluid to see if it is burnt or dark because it will stink bad if the clutches are burnt. if it is sliping in and out it might be a wiring problem.
I will try that, i have a scanner but never even thought to check. ThanksSounds electronic to me, but I would consider tossing in a can of transx just in case it has a stuck servo. I think (?) a scanner will pick up codes from the transmission. Look for P07** or P08** A scanner will be about $50 and is really handy to have.
I will check all of the connections. Fluid does look and smell normal and there is no slipping at all, nice firm shifts. It just acts like your driving with the OD off.that sounds right i bet it could be a electrical problem. check your battery post and all of your grounds. does the fluid look good because after you changed it is when the sliping started?
HMM... ok. Where do i find that? is the APPS the same thing?.......try the tps for the tc