trapshooter

OK so I just got 35" tires and got them alligned. On my way home I stopped at the store, when I got out It smelt like something was burning under neither near the rear wheels. At first I thought it was the exhaust pipe but it wasn't. It went away pretty soon. Then today I was driving and I was going down a residential street and had to put it in 4wd to turn around. I put it in 4wd and turned and continued driving. One I got to the intersection I took it out of 4wd and put it in 2wd. When I had the right to go I pushed the gas but nothing happened. Looked in my mirrors and my tires wern't spinning. I put in park and then back in drive and still nothing. Then I switched from 2wd back to 4wd then to 4wd lo and then there was a loud clunk and the vehicle jerked. Then it went.
Drove the rest of the way home in 4lo (only a few blocks) once I got in my drive way I went back and forth in 4wd and 2wd and everything seemed fine.
What could have happened?

Thanks
2006 f150 4.6l

acdiecast

That is bazaar! When you had the issue of no spinning rear wheels, could you feel the engine laboring, or did it sound as if it was in neutral? My thought is it may be a parking brake seized.

trapshooter

It just felt like it was in neutral

acdiecast

That is odd! Two more questions, do you live in a state that uses corrosive materials to treat roads if you get snow? Also, did you happen to notice what the tach was doing during all this?

KevFord1993

transfer case? or the diff?

Dirttracker18

So lets be clear on the symptoms.

When you attempted to leave the intersection the truck revved up as if it was in neutral, as if there was no load at all?
or
The truck revved up as if you were in gear but had your foot on the brake while pushing the gas pedal?

If the former, it sounds like the torque convertor was not enabling or the trans was slipping badly in first gear. I suppose it could have been the transfer case not entirely changing back into gear when you went from 4wd back to 2wd.

By engaging 4low you forced the tcase to change and attempt to go back again. I sure miss the days of the transfer case shifter when you knew exaclty what gear you were in

07cruiser

Sounds like a transfer case issue, not re-engaging properly.

Especial86

iTrader: (1)

If does sound like your transfer case was partially engaged.. The burning smell is a bit odd.. I'd check all the harnesses at the tranny and t-case and make sure there is dialectic grease at the connections.. I'd be leaning towards a shift linkage issue.
It may also be a fluke occurrence due to the cold.. Make sure you warm your truck up well in these cold months. I usually won't even drive unless my transmission fluid temps are around 90 degrees. Cold weather can cause sluggish and or partial engagement of the tranny until it warms up.

trapshooter

Ok now I'm more worried about the burning smell. Idk what it could be. Checked transmission fluid and it seems fine. You can mainly only smell it from the rear of the vehicle and the right side.

Especial86

iTrader: (1)

If the smell is similar to burning wires you may have a seized or worn caliper, or brake drum.. Make sure the e brake is off too....