HELP! 2007 Dodge 2500 4low works, but no 4hi

Bama67 · May 6, 2011

Hello all, I just noticed recently that my 4x4 in my truck isn't working in 4hi, but 4 low works perfectly. It is a 2007.5 Dodge Ram 2500 diesel.

It has the dash mounted switch, I turn it to engage 4hi and I get the dash indicator and I feel a clunk and it feels like it engages, but the front doesn't pull. I switch it to 4lo and I feel and hear it engage and it does pull and works great. I am not really sure why one would work and the other wouldn't especially when I can feel it and hear it trying to engage and even get my dash indication. Can anyone help with this? I am not a member on any off the diesel forums but will join if it can help with this. My warranty is expired so that isn't an option. Hopefully it is just a little issue. Thanks.

Oh, and I need 4wd tomorrow, so if I can't get it knocked out in the morning or tonight I guess I will scream around in 4lo. :laughing:

Diamondpilot · May 6, 2011

My experience with a Dodge 4x4 unit was my neighbors. It was much older, a 1996 with a 360, but it broke the shift fork in the transfer case. It would not engage 4 high or 2 wheel drive but 4 low worked. I would start at the transfer case.

By the way I fixed it. Local Dodge dealer got the parts in a couple of days. We dropped the drive shafts, then the transfer case. Once I opened it up it was easy to see what was wrong. It was not a dash switched unit but the old floor mounted lever actuated unit.

Good luck.

Chris

dstig1 · May 7, 2011

Yeah I'm with Chris. If the 4wd hi does not work but low does, that points to Xfer case. Frankly I don't know more about what ChryCo uses for Xfer cases or their inner workings so that's the best I can offer.

tractorboy5500 · May 7, 2011

They say this happens when it dont get used much, I try to use mind when I am at my property just to check it out, anyway try engaging it in 4H just going real slow, just DONT do this in 4L, 4L has to be a complete stop, they say I can engage mind in 4H as long I am going under 35 or 45 mph, I read it a few times, then I did it going slow and tryed it more times going a little faster, I got up to 30 mph and it still shifted good. I was a little worried at first, Hope it works out for you. Lets us know.

Bama67 · May 7, 2011

Thanks for the replies guys. I sure as **** hope it isn't the xfer case. I will try to go into hi moving and see what it does.

tractorboy5500 · May 7, 2011

On your 4H and 4L switch, there is a small light, it will blink until it is fully engage then when fully engaged the light will stay on, keep an eye on that also. And since Dodge uses a solid front axle, when using the steering wheel it is a little hard to turn sharp, it will let you know. Good luck.

manganos · May 7, 2011

Post this on cumminsforum.com and you will get all the help you want too.

Dmace · May 7, 2011

What does the dash light do when you turn the switch to 4H?

I had a friends truck with the same problem where only 4H wouldn't kick in, the light didn't turn on in 4H either. It turned out to be the switch itself and was a pretty easy fix. I'm glad I still have the nice big shifter on the floor of my 03 RAM.

Bama67 · May 7, 2011

I do get the 4x4 indication light on the dash. I also hear it click and feel it lightly thunk like it always does when shifting into 4hi. But the front doesn't pull. I test it on a huge sand bank by the house. 4lo pulls good, 4hi doesn't even try.

I also tried it at speed, that didn't help either. I will post it over on Cumminsforum. Thanks everyone.

Soundguy · May 7, 2011

try driving backwards, then forewards and then shift to N and then try to engage it.

had to do that once onmy yukon that has the shifter button on the dash.. hadn't used 4wd in a while and it got sticky.

I like my dodge 1500 with shifter on the floor.. no doubts about when / if it shifts

soundguy