4x4 not working right

Asked by Nov 20, 2013 at 05:00 AM about the 2009 Ford F-250 Super Duty XLT Crew Cab LB 4WD

Question type: Maintenance & Repair

i have a 99 f250 sd v10 that when i turn the switch to 4 wheel drive it will work but pops
and makes bad noises when driving in 4wd why is that i noticed when i climbed under the
truck and go to turn the half shafts going into the transfer case one up will turn but the
other will not does this mean that my hubs are bad its auto locking hubs

2 Answers


You may have a bad wheel bearing, causing it to pop.


Your 4 wheel drive system is designed to work part-time. Unless you are on a slippery surface (wet road, dirt, ice or mud) the drive train will bind and cause the wheels to hop and make all kinds of noises when turning. There is no differential between the front and rear drivelines. All 4 wheels and tires need to be of the same diameter. That being said: Get all 4 wheels off of the ground at the same time and check bearings, differential and transfer case fluids. Also check your ball joints and tie rods.

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