I asked on another thread about this, they said to start a new one so here goes.

 

I got this 88 GL10T AWD with a 4EAT that shifts under 4000 rpm when at WOT. I was wondering if this is the nature of this tranny or if there is something I could check?

 

Thanks, Kevin

No, it's not the nature of the trans. Someone made some suggestions I think in that other thread, did you follow those suggestions?

 

TPS might just be flaky, I think that's part of the TCU circuitry. Someone on the subaruxt.com forum has taken apart a TPS and cleaned it before and said it smoothed things out considerably cleaning up all the contacts inside of it. So that tsuggests they can wear in some way over time and *might* effect shifting?