1999 4.0 rear main seal

scotttruhart said:

HI

90k on jeep, im noticing some wet areas between tranny and oil pan. i have yet to see a drop on driveway. is this a rearmain failing? POSSIBLE. Clean up the underside and keep an eye on it for a week or so.

i have heard that these engines have this occur so am i looking a problems with this or is it a easy repair? should i run out and have this repaired?

DIY. At the same time you WILL be forced to do the oil pan gasket. Plan on a whole saturday, and half of sunday.

any one know how much this repair should cost?
thanks,

also i noticed i have 2 O2 sensors. i have neve replaced them and the check engine hasnt come on.. does this mean they are ok? will teh light comeon if they go bad?? Check engine light comes on when there is a problem with any of the sensors.

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