Hey guys, I just want to know if I should be planning for a major repair. Most of the time my car drive and shifts fine but if i've been drive for a long time (like on the highway) and I stop at a light and take off again my car shifts from 1st right to high gear I have to floor it to get it to shift back down to 2nd gear. Please help.

Trans fluid and filter change? Run some sea foam trans juice throught it first. But that is very odd its going all the way to 4th...... :? I went to school for atomotive but wasnt that great at auto trans stuff. Anyone else?

I might be wrong, but it is a simple attempted fix at least. The TPS sensor relays information on how far open the throttle is, if it isn't relaying that back to the PCM properly, it can cause impropper shifting. TPS works on a resistance value... if the is a break in the winding, you can skip point, going to WOT causes the tranny to down shift back to where you want it. Try replacing the TPS sensor, and see what happens.

Also how do you know it is going into 4th gear, if it isn't this could be a totally different issue...?