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I have a 2001 Ram 2500 Diesel. When I am driving at aprox 50 mph, the trans seems to either be getting air or attempting to shift down. It is only for a split second then returns to normal. It is more apt to do this when cold. If I take the truck out of overdrive it changes nothing. I was told its a TPS but I would like some more input. Any sugestions?

I have a 102k mile 48re in my 06 CR truck. I never tow more that about 5k pounds the other day I was accellerating up a hill with about 1500 lbs of 4 wheeler, coolers, trash, and butts and I think my T/C slipped a little. As soon as I felt and heard the slip, I got off the throttle. My question would be, what do I need to have a good reliable build without using a full billet input,output, and intermediate shaft, nor do I think I need a triple disc T/C or a complete rebuild. Yes I'm cheap and if I have to rebuild it, I think I'll do it myself. Where might I get the things I may need. I have a super chips vivid tuner 5 inch exhaust, and a AFE intake. 3:73's and 35's.

Ok... so as i get going down the road, my truck wants to jump in rpm's erratically, and the tranny feels like its surging? the check engine light wasn't on and today i got what some call a "Dead Pedal" the check engine light came on and it snapped right back... it feels like it just doesn't know which gear it should be in? im so confused ive been online looking for days... ive read it could be many things From the TPS, a Torque Converter to a Ground or even a solenoid. Im so confused :banghead:, and I just bought the truck. I have always wanted a cummin's, I just hope I didn't buy a lemon PLEASE if anyone has had or heard of this I really need some insight here. Thanks HarringtonPS: I also did the OBII codes and Got P0743,P1693,P1763,P1765 and auto zone got something also related to the TPS... if that helps

I've spent the better part of a day an a half searching for someone that has posted something similar to the problems that I am having with no avail. I am hoping someone has some insight. This is on my 2001 4X4 that is pretty much stock.Background - It is on the third engine that I know of with the most recent swap being about 4 months ago. I do have codes that I have pulled with a scanner, but do not remember the numbers, something related to no communication from the transmission BUS. I believe that it is a ground or a plug somewhere, but being a new member I do not have access to the files that I need to trace it. I have gone through the schematics on the main site with no avail. I am giving the symptoms with hopes that someone knows exactly what is causing this problem.Sometimes it will go through all gears fine, but it is usually only if I keep it around 1900-2000 rpms through all of the shifts. If I drive "normally" it will hold 1st gear until 2500+ rpms and the shift into second and never find third. It will run the rpms up beyond where I am comfortable and still never shift. If you let off, there is engine braking and it seems that T.C. is locked up. I can make it shift into 3rd by dropping it in neutral when it needs to shift into 3rd and it will go into 4th and the T.C. will lock up. When I stop, sometimes it will drop back into 1st, sometimes it will stay in 3rd and I have to manually shift it to 1st. I have changed the filter, fluid ( just what was lost dropping the pan ), checked / adjusted APPS voltage and most of the connections under the hood. This is a problem that started with nothing really changing on the truck. I have taken it to a transmission shop where they plugged it into a computer, hooked some pressure lines to it and tested it they stated that the transmission is mechanically sound. During my wire tracing I have found that the vacuum lines from the transmission area to the front axle were rubbed into by the front drive shaft and that there was another vacuum line on top of the transmission unhooked. This still has not solved my problem. Any suggestion would help - I will be spending the rest of the day in the shop with this truck and watching this forum.Thanks!CB