i have a 93 w a 518 automatic trans, and for what ever reason it just decided to act up on my this weekend, the trans has been rebuild at somepoint in its life and is very clean, and just got a service a month ago, for what ever reason yesterday it would not shift into overdrive and when it did it would pop right back out into 3rd, i know the tps controls 3rd to 4th gear shift, any ideas?

 

TPS is bad or out of adjustment.

 

Tps delete all the way

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Like said, the TPS is either bad or needs to be adjusted. Does your speedo still work?

 

speedo never worked acuratley it always jumped around, what will tps delete do?

 

TDR shows you how to use a cheap tps instead of stock

 

how do you install the dnr customs tps the instructions are confusing can anyone show me pics?

 

Its very simple. Unplug tps, plug wires of tps delete into the connector in the order shown in the directions. Take it out on the road and turn the pot until overdrive kicks in at the desired speed.

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i have same problem where it acts fien one day and then next day it is in and out of OD and speedo goes out when it jumps out of over drive?? my guess is TPS is bad??

 

That sounds more like the VSS to me. There is a sensor on the side of your tranny, that's the VSS. Sometimes if you just unplug it and clean it everything works fine, but it may need to be replaced.