I have a brand new '06 2500 Big Horn and last week I put the truck in 4H for the crappy road conditions we had down here. A week later (after I put the xfer case in 2H) I noticed my fuel milage dropped off sharply. I crawled under the truck and found that the front driveline was and is still engaged.
Anyone else have this problem? How bout a remedy?

 

You can't turn the front driveshaft because it is still connected to the front wheels. On our trucks the front d/s is turning all the time the truck is moving. The connection is made inside the transfer case for 4wd.

 

And there are lockout hub kits available if you wanted a free wheeling hub setup. I can't remember the manufacturer but someone will chime in with the info if you want it.

 

Hub conversion kits: Dynatrac and EMS Offroad. EMS is less expensive, but the kit for newer Dodges isn't out yet (or they haven't updated their website).

Tony

 

Thanks everyone!

 

What's the deal with your mileage?