My transmission has been acting up for quite some time now. it will go in and out of o/d and back to third a few times before it will catch lockup. The shop back in St. pete replaced a couple of things, shift solenoid and something else. Obviously that did not work. then they wanted to rebuild the unit. went to shop today, where i live now, and he really does not think it is a complete bad tranny, he is wanting to replace the tps depending on the diagnostic. does any of this sound familier to any of you??? The tranny has about 37k on it.

Kip

 

I have a very similar problem.... mine will shift between 2 and 3 and between 3 and od at random before it will settle on a gear to sit in. it is less noticeable when there is a lot of power put through it (it will shift fine if you lay into it all the way up to about 55mph) but when you are giving it medium throttle, it will jump between gears.

If any of the transmission experts on this forum have any suggestions, i would really appreciate the input. (both of these problems seem similar)

 

The TPS is very easy to remove and clean, two screws,, remove three wire connector and that,s it. Clean it out with brake cleaner or contact cleaner while moving the wiper with a screwdriver. Check with a meter for smooth resistance change. If it's smooth it's OK, no jumps or dead spots. You can't get it on wrong if you install with connector down. Clean connector and seal with dielectric grease. Pull TPS wires out of loom they are in and route seperatly to prevent noise on the wires, a problem with some.

 

Thanks for the reply. First of all, it is behind the pump, correct?? Next, on checking the resistance, It is with the vehicles battery turned on but not running correct?

Kip

 

If you are looking at the injector pump it is just a little below it outside of it. TPS is located at the throttle pivot point with the throttle return spring right behind it. Has two screws holding it with a small connector at the bottom. Yes, it would be slightly to the back of the pump. Once you have it off what you are checking is operation of the wiper inside of it. No power required, it's a resistance check. The wiper gets dirty and needs to be cleaned. The TPS sends on a very small voltage to the computer telling it where the throttle is.

 

you can slot the holes out and adjust it a little to,I had to do it on my 95 auto

 

Sorry JARHEAD, the TPS is just at the front end of the pump,,not the back. Got turned around in my head. Yes you can slot the holes but a very small movement of the TPS gives big results so a little at a time does it.

 

https://www.dieseltruckresource.com/...&highlight=tps Read on this for cleaning and adjusting, Goodluck,,,,Rick

 

TPS is the square box in the foreground of this picture

 

I did the opening up of a TPS 8 months ago that kandgo posted the link to, because my tranny was hunting badly and rather then replace it again I wanted to see what makes them tick
The first thing I found was contact cleaner sprayed around the shaft does no good because it cant get past the shaft seal into the contacts inside the TPS
Since I drilled the hole into the back side of the TPS 8 months ago after spraying it with contact cleaner I have not had any more troubles with my tranny hunting
If it starts acting up again I can simply remove the silicone from the drilled hole and respray it

 

to get into the tps, where does the hole need to be placed to avoid damage to inside components?

 

Look at the post I did it will give the hole location and size

https://www.dieseltruckresource.com/...&highlight=tps

 

My TPS has a removable back now. I just cut it right at the ridge on the back, open it up, clean it and reseal the back on with silicone. Works well and nothing else can get in through a hole. I guess you could seal the hole the same way.

 

i wish i has seen this before, esp the details on it. i just bought a tps a month ago. looks like a wasted 220 bucks. btw it works way better when it gets pluged in when you change them

 

I assume it took you a while to figure out that you didnt plug yours in when you got a new one?!?!?! I've been down that road.... more than once....