Question about 1999 Dodge Ram 2500 4WD
When your truck is shifting like you mentioned you need to check the battery cables. Better yet just replace the cables. Even a small amount of corrosion can cause a break down in the flow of current to the trans computer and cause erratic shifting. New cables should fix you right up. If this does not take care you need to start looking into "noise" from the alternator wire or other electrical interferrence. Another possible solution is to install a Hapi Box which clears interferrence in the wire from the TPS to the trans computer. It worked on my '02 until the cables corroded. I stripped back about 6" and found a mess in there. Good luck. (oh, Dodge will seel you a new trans to fix this problem. Be ware.)
Posted on May 23, 2009
94 and on up ram diesels have a throttle position sencer on the motor which tells the trans puter when to shift, and not, this is a common problem with these dodge's. when it go's bad, it will make trans shift in and out of overdrive, same as if speed sencer on back of trans will do.
Posted on Jan 22, 2009
I had the same problem on my '01 3500 diesel... even though it could be something "huge" start with the basics... start where #3 hinted, its most likely a bad ground issue... aftyer spending $500 plus dollars on a TPPS that I really dint need it was a bad ground. so remove all of your ground cables from batteries and clean then "very" well also do the same at the frame and engine if so equiped... you have nothing to lose except for a 1/2 hour of personal labor... it may save you big $$$... if not then you either have an ECU computer, Tranny, or TPPS going bad...
Posted on Dec 02, 2008
I'm having the same problem with my 2001 Dodge 2500 Diesel 4WD. While cruising at approx. 50mph, it shifts out of, and back into overdrive repeatedly. It actually started doing it be tween 2nd amd 3rd gear once in a while.
Posted on Nov 04, 2008
I'm no expert, but I am on my second Dodge. I have a 2004 Ram 2500, 125k miles on it. I traded in my 2001 1500 with 99k on it.
Your problem sounds like one of two things that happened to me. At 110k mi's it was not accelerating properly, particularly between 40 and 50 mph. It turned out my torque converter was going bad and I ignored it for too long and it's disintegrated pieces ruined my transmission. I recommend getting over to Aamco right away or to the dealer if you are still in warranty and have the TC checked out. The diesel is just too much torque for a torque converter on the automatic transmission, but manuals are too much of a pain these days. $2300 at Aamco to have the TC replaced and the tranny rebuilt.
The new problem I have now is when it acted like it was out of fuel and then wouldn't turn over after it died. My fuel lift pump (diesels have two of everything and the expensive one is always what goes) has gone bad and is currently being replaced, $700 part, plus another few hundred in labor.
Hope this helps.
Posted on Oct 28, 2008
GROUND BOTH SIDES OF THE GROUND FOR THE TPS, SPLIT IT WHERE IT COMES OUT OF THE TPS AND RUN BOTH ENDS OF THE WIRE TO A GOOD GROUND. MY 1999 DID THE SAME THING. EVERY ONE TOLD ME TPS IS BAD. I LOOKED ON EBAY AND SAW MANY BOUGHT BUT DID NOT NEED, SO I FIGURED IT OUT MY SELF. NEVER HAD ANOTHER PROBLEM
Posted on Sep 19, 2008
Had the same problem on 1999 2500. The main injector fuel pump went out and when we replaced that the truck started shifting correctly???? Go figure.
Posted on Sep 17, 2008
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