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Discussion Starter · #1 ·
Got a strange problem. When driving down the highway, my engine will rev up a few hundred RPMs, then immediately drop back down. It usually does this when it hits a bump, but lately has started doing just on smooth pavement. It's been doing this ever since I purchased the truck about a year ago. I've got a 1999 RAM 1500 4x4 w/ 3" lift and 33" tires. Originally, I had 35" tires and thought that might be the problem. But I just switched to the 33" and no change. This problem occurs consistently and mainly on the highway when holding a steady speed. My local shop spent a day working on it and looking at TSA, but no luck.

Anyone got any suggestions. This is driving me crazy.
 

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Torque converter itself or torque converter lock-up selenoid is going out.
 

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Yeah my truck has done that since I had bought it. Even with stock tires. I have noticed it mostly when I'm driving down the interstate on a slight incline going between 50-60mph. Never had any problems with the tranny. I just kind of keep and eye on it so that it doesn't do it to much.. DDGETHS
 

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I´ve post one topic with the same question and some reply´s either. And everyone told me that could be the Torque Convertor or the Torque convertor solenoid. I haven´t solve the problem because now I need to get a TC for a 46 RE and I don´t know where to get one, because at first I knew that my Tranny was a A518, and now I know that it isn´t, it is a 46RE. I bet for the Torque Convertor or Torque Convertor Solenoid.
By the way, anyone knows where can I get a TC for my Truck? :wink:
 

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That is an easy one...TORQUE CONVERTER is bad! IT is engaging and dis-engaging on the highway...you might oughta think about having someone go over your tranny since you did run big tires for awhile...could be an early symptom...trust me, I know...
 

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Yeah Beast knows his stuff about dodge trannies, I found that out. :D:
 

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Discussion Starter · #8 ·
I checked back with my local shop that's been working on my problem. They agreed with the torque converter and/or solenoid being the problem. However, after I got all excited, they explained they had already checked those and everything was ok. They've determined that the problem lies somewhere in the the electronics that control the TC and/or solenoid.

Any thoughts on that?
 

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have you corrected the speedometer after putting the larger tires on? it could be that the truck thinks its going faster/slower than it actually is. the converter unlocks when it thinks its gotta work a little harder.
 

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Here is some good advice on this---take it to someone else for a second opinion. I am almost 100% sure that it is transmission related from your description. I can get into the theory of operation of the torque converter and lockup, but it would take up too much space, and I don't feel like typing that much. Trust me, get it diagnosed by someone else, don't tell them what the previous shop said, and if you get a different answer, take it to a third reputable shop, and see what they say.
 

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Discussion Starter · #11 ·
Well I finally put on that TruSpeed I bought about 6 months ago. It fixed what it's supposed to, but I'm still getting the engine reving problem. I'm going to calibrate with a GPS tonight, then unhook the battery to let the computer reset. Doubt that works, but want a clean slate if I go to another shop to have it looked some more.

I'm still open to any other opinions out there. I'm trying all the simple stuff first cause it's gonna get expensive having people try and diagnose it.

Thanks for all the replys so far - I'm taking all into consideration.

chill
 

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I have been having tranny problems as well, and I think that with the symptoms that you have given that you should take it to a transmission specialist, one that has a good reputation. I'll bet that there is a problem with the Torque Converter.
 
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