Loud CLUNK with 4WD low

[Dylansav]

This might be the problem but I know very little about the differentials and all that but we took my 98' 4.0L SOHC to the mechanic and he told us that we had a rear pinion seal leak.

So later that day...I was in a parking lot and was checking out the 4WD on my truck. I dropped it into 4W High and it sounded normal. Than I dropped it down to 4W low and as soon as I put it back into drive I heard a loud CLUNK in the back.

Could this be caused by the pinion seal leak?

Thanks for any help

 

[IZwack]

Go see if the pinion is leaking, and push/pull on the driveshaft near the pinion flange -- if its loose, then the pinion is definitely leaking.

 

[Dylansav]

yea it's leaking- thanks for the help

is it bad to drive with this for a week?