I recently got my truck. I drove it 300 and somthing miles from Rockford Illinois to Southern Illinois ( East of St Louis) and the transmission was fine. The guy I bought it from said the tranny was rebuilt a little while back. Today, I did a few small mods to it. I turned the "star wheel" 25 clicks, and I straight piped her to a stack. I took it out on the road, and i slammed her to the metal. It was lous Then I turned onto the highway, and she shifted excellent, but it didnt go into over drive! It just stayed a steady 2500 RPMS or so, at 60 mph and wouldnt shift! The OD Button OFF button wasnt off, so it was just how it always was. I wasnt in 2 or 1, just D. I even shifted her into N then back to D incase, but nothing. It just wont shift!I got home and reversed the "Star wheel" incase, and took her out again, but it was still acting the same. I havent done any other mods! I need to drive this truck! What do I do? Does the muffler have a baffel or something to make it shift? Help!!!

 

The problem isn't with the muffler or any mad you did.
With out having the truck to diagnos I can't say what is wrong.
But will suggest it is an electrical issue. Make sure you didn't get the new pipes close to a wiring harness.
OD and lock-up are electrically operated.

 

Ok. Well, I dont think that it would have gotten too close. I still lack the piece of flex exhaust tubing to go under the frame and to the stack. It is just right out of where the cat began. Nothing against your word, but in my opinion I dont think that just a few min worth of running woulda fried my wires.

 

I was just sitting around thinking about what it could be. The other day, before I drove it again. I sprayed the whole engine with oven cleaner / easy off and could that have possible gotten into some electrical thing and messed it up? What could it be?

 

I can't think of many autos that will shift into od when floored. You can try adjusting the tps if you feel it's holding back excessively. Instructions> http://dodgeram.org/tech/transmissio...TPS_adjust.htm

 

True infidel, but I did try it several times, from an easy, normal start. Still nothing. I am going to mess with the TPS tomorrow. thanks.

 

It's possible while removing the TPS its out of adjustment. Try adjusting it underneath with a 10mm and spray a contact cleaner up under it also.

I've done the same thing before.

Good Luck and keep us posted

 

I do not understand on how to "adjust the TPS"!! What do you mean adjust it? I took it off just now. I took the 2 bolts off of it, and unplugged the wires. The thingie turns inside it, so i lubed that and the wires up with WD-40. I also put a volt meter on it, from the instructions I got from here, and I have a constant 5 volts on it. Even when its WOT. What do I do? I called my auto parts guy, $250.00!!! I was also wondering about this. I washed the whole engine compartment with oven cleaner, could that have hurt it? I know I said that before, but thats my guess!

 

The instructions aren't real clear. What you need to do is strip a the ends off a couple inches of wire then cut all the strands but a few off of one end. Now you can stick the end with a few strands in the female end of the orange wire connector then push the connector back together. This gives you a place to connect your voltmeter with the connector together, the other instructions say to use a paper clip. Now you should see 1.2 at idle up to 5 volt wide open, pos lead to orange neg to ground.



If you can't get the adjustment in the recommended range by rotating the tps on it's mounting screws remove the steel inserts where the mounting screws go though the tps and file the holes oblong. This will give you much more adjustment range.

 

Thanks infidel. So I am just taking some wire and putting it on the other wires, to get a more accurate read. I will try that. So I loosen the 2 bolts on the TPS and just work with the play in those? Then tighten her down when I get the right voltage? Could I strip a small section out of the orange and ground wires, and wrap a spare piece of wire awound the bare area for a good test? Thanks. Could there be a short some where in the wiring? Is there a fuse?

 

It's not really good to cut or pierce wires to take meter readings, the wire tends to corrode at that point. What you are doing is sticking a few stands of wire in the plug before you plug it back together to make an outlet for your meter.

No fuse except to the pcm, if it was blown you'd have a ton of problems.
Highly unlikely a wire is shorted.
You're got the right idea on the rest of it.
Good luck

 

OK am I totally clueless as to of what the problem is! I have messed and messed and cleaned and adjusted and volt metered the TPS and still no sucess. I have a constant 5 volts on everything all the time. I called dieseltrans.com and they said it could be a trans temp sensor. Where is that? Could it be the problem? I hate to buy a new TPS at $159.00 bucks and it not be the problem, then be stuck with it. What do I do? I am 100% out of ideas. Please help me!

 

The trans temp sender can cause a no lock up at all situation if it's bad. On your '95 the sender is located driver's side a little ahead of the tranny on the steel cooling line, wires going to it. Unplug the sender and jump across the two wires to the pcm with a 1k ohm resistor, 25¢ from Radio Shack. You can just wedge the resistor leads in the groove of the prongs and tape it, it will stay. What this does is trick the pcm into thinking the fluid is at the correct temp. I've had my tranny set up this way for years because my stock sender is disconnected and a real temp gauge sender has taken it's place.

If all else fails take it to a good tranny shop. They can hook their computer up to the port under the dash, take it for a spin and tell you exactly what's wrong. Many will do this for free.

 

OK infidel. Thanks for your help. I just got back from the auto parts joint. $17.99 for the trans temp sender. I installed it, took her for a spin, no luck. 17 down the drain. Should I still attempt the 1k ohn resistor method? Thanks alot again. If all else fails, Im taking her in to the doctor.

 

No, the resistor would only prove the new sender is bad, which is doubtful. If I'm reading you right you only get 5 volts between the the orange wire and ground, nothing else?
If so it has to be your tps. I'd get an opinion from an expert, that means not the dealer, before buying a new tps.