rear main

194stang said:

i dont think you could do that in a hour and a half....the tranny has to come out.bellhousing,clutch, flywheel, the oil pan has to be droped.... when i replaced mine,i just went ahead and pulled the motor, wasnt that much more work

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Why would you need to remove the oil pan? The rear main seal seals the back of the crankshaft to the block. The oil pan has nothing to do with it.

Figure at least 3 hours, like said earlier. The driveshaft, transmission, starter, bellhousing, pressure plate, clutch disc & flywheel all need to be removed.

While they are replacing the rear main seal, have them replace the pilot bearing, clutch disc, throw out bearing & resurface the flywheel. They are not absolutely necessary, but you might as well since they are taking them all out. They won't charge you any more labor as well (except $20-$30 to resurface the flywheel). Those are the "moving" parts of the system, and you don't want to pay a mechanic another 3 hours of labor just to replace a TOB or pilot bearing.
Scott