Hey guys, been a while because my car was running great with no signs of anything bad in my future. Well I noticed that my rear-end has a leak (the car's rear-end) and it is being sprayed onto the exhaust, by "it" I mean the leaking differential fluid. So my query is this:
oh yea: 1966 dodge dart 270 with 225 and 7 1/4" rear, bone stock tranny and rear. Pulled the tranny out when I took the engine out and rebuilt both.

onto questions:
1) What could be causing the leak?
2) Can I repair/replace worn parts/seals/gaskets with the rear-end still bolted into the car?
3) How bad is this for my car to be driving while the leak is still present? (distance and speed)?

Caesar