Thread: Irritating Transmission Problem

Could be.

MAF and TPS can cause similar issues. But it does sound like you probably need a rebuild or different tranmission.

Hi Victor,

If you have access to an actual scan tool or a shop that has one and can watch live transmission data that is your first step to see what is going on. It honestly sounds like it is rebuild time and definately pressure related problems, but it is always good to check before digging in too far and then still having the same problems. On a scan tool you need to watch what the "Current Gear" is that is commanded by the pcm. If it is only commanding 1st gear then it wont shift and there is a reason for it. A number of engine sensors effect transmission performance. A bad TPS sensor will cause irratic shift timing but would generally be a pretty linear problem and all shifts would happen late, not just the 1-2 shift. I have seen plenty of transmissions with a partially blown channel plate gasket that will cause pressure loss and part throttle slippage in various ranges and this is an internal problem. A pressure guage on the transmission will also verify that at least it can make enough pressure that is being commanded at a given time but I realize this is not something many people have and most shops dont use them.

Originally Posted by Trannyman95

I realize this is not something many people have and most shops dont use them.

thanks for making me feel like the odd man out for having a gauge set.

As long as it's a GS (supercharged) you'll be fine. It's plug and play.