Hi,

I've read many many threads and I believe my problem to be the transfer case....none of the threads I read have my symptoms though. This all occurred in the last 10 miles

2002 ford explorer, 4x4, eddie bauer.

Here is goes......
The truck jerks/bucks while at a complete stop with the depressed. It's a thump, thump, thump that comes from the transfer case
The thump gets better while driving and no brake being used
The thump is present in 4A, 4H or 4L
Unplugged the transfer case electrical and removed all 3 fuses.....same thumping, forward or reverse, 4h or 4l

All four wheels off the ground....thump, thump thump while brake depressed, let off the and the noise goes away.

I don't understand this - all wheels off the ground, brake depressed, the drive shaft is turning. I'm not familiar with this but I noticed is also has an electrical connection. It's a limited slip differential However, with vehicle off the wheels will turn independently - at other times it will engage the opposite in counter-rotation which is what i expect.

Finally - transmission in park - the will roll sometimes but not all - leading me back to the transfer case.

Please help....
-Kevin

 

The transfer case is the main problem.I have a 1998 Exp with 5L engine 4WDA and one day we have found my truck down the street (40 yards) away .
I contacted JASPER supplier and got a OVH case, changed my self, it works .That happened at 160 K, now I have a 330K and changed oil once since , still working good.

VR Mirek

 

I don't understand this - all wheels off the ground, brake depressed, the drive shaft is turning. I'm not familiar with this differential,
but I noticed is also has an electrical connection.

how can the drive shaft turn if the brakes are locked and tires not rotating ? The electrical plug on the top of the pumpkin is for the ABS ---