I have a 98 dodge dakota with the 5.2l v8.. I bought the truck with no 4×4 and I need the issue fixed.. I have a manual tcase and when I engage it into 4hi or 4lo it acts like its engaged at a low rpm.. but once the rpms are higher its back in 2wd.. what could be my problem.. any ideas would be helpful.. thank you

 

What do you mean "acts like its engaged at low rpm?"

There are no hubs or anything to lock. It's internal to the t-case. While AWD was an option, most are part-time 4wd only. You can't drive it on bare pavement.

 

I mean when the rpms are at 3,000 or less... and I'm not running it on bare pavement. I live in Michigan and there's snow and ice on the ground..

 

Verify that it is actually going into 4wd. Can you lift the truck?

Make sure the shift linkage is working correctly and that it's going fully into position. How are your motor/transmission mounts? Is it popping out of position?

Otherwise you're likely looking at an internal problem.

 

Check if you've got 4wd.

Placing the vehicle on ice, snow, dirt or gravel, as long as nothing is weak and going to break, place it into 4L or 4H, put it into gear and jab the gas just enough to cause the tires to spin for just a few inches.
It doesn't take much.
Look at the tire marks in the road surface.

In 4wd, one front tire and 1 back tire will leave a spin mark.
If you've got a limited slip axle, one front and 2 back will leave marks.
Without 4wd, only the back marks will be there.