Rear main seal ....(semi-long)

[Shotgun28]

When my new tranny is installed, do they replace the rear main seal? Is it apart of the original estimate and should it be assumed that they will replace it, if it is a reputable shop. THe reason I ask is my car is in storage right now (MN winters) and I start her up every other Sunday, just to hear her purr, and I have a leak, can't see where it is coming from, but it appears to be running down to my Long tube headers, which makes me think rear main, or perhaps, valve cover is leaking, but don't see or feel anything...Anyone have any thoughts, sorry so long.

Kevin

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91 LX Convertible Gray on Red B&M Shift improver kit,ASP red alum. underdrive pulleys, Richmond 3.73 gears, 1 5/8 Flowtech long tube Headers and off road h-pipe, Flowmaster 2-chamber cat-back with S.S exhaust, MSD 6A Ignition with coil,Cap and rotor, Taylor Pro wires, K&N 12" conical filter system, Jet stage 2 performance chip and just purchased some GT40P heads, looking at exhaust, Lentech Street Terminator plus on it's way...