The rear main seal is NOT accessable while replacing the oil pan. It is the seal at the back of the engine crankshaft, which is only accessible with the transmission removed. Completely different repair, different labor.
The common problem here is -- which is leaking? The pan gasket or the rear main seal? That should be narrowed down as well as possible first prior to undertaking either repair.
The question was " Are rear main and oil pan gaskets connected " And the proper labor is included in the estimator price for the transmission removal etc, if rear main seal is chosen. If the question said what is the procedure then I would have answered it differently
Based on the significant effort for either repair, I feel like the consumer (anonymous) needs to know the facts.
Not to be argumentative, truly, as I appreciate all perspective and input but on this entire web site, here was the subject and question:
"Are rear main and oil pan gaskets connected" "Is the rear of the oil pan gasket part of the rear mainseal gasket?"
The answers are: "No," and "No".
And I respectfully have to tell you that this answer:
"The oil pan has to be removed to get to the rear main seal"
...is entirely invalid.
To refer entirely to facts, here is the procedure to replace a rear main seal directly out of the Ford shop manual:
------------------------------------------------ Remove the transmission. For additional information, refer to Section 307-01A (4R70W) or Section 307-01B (E4OD).
Remove the bolts.
Remove the flexplate or the flywheel (6375).
Use the (A) Rear Crankshaft Slinger Remover and the (B) Slide Hammer to remove the (C) rear oil seal slinger.
Use the (A) Rear Crankshaft Seal Remover and the (B) Slide Hammer to remove the (C) rear main seal.
CAUTION: Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These tools cause scratches and gouges which make leak paths. Use a plastic scraping tool to remove all traces of old sealant.
NOTE: Lubricate the inner lip of the rear crankshaft seal with Super Premium 5W-30 Motor Oil XO-5W30-QSP or equivalent meeting Ford specification WSS-M2C153-G.
Use the Rear Crankshaft Seal Replacer and the Rear Crankshaft Seal Adapter to install the rear main seal.
With the Rear Crankshaft Seal Adapter still installed, use the Rear Crankshaft Slinger Replacer and the Rear Crankshaft Seal Replacer to install the rear main seal slinger.
Position the flywheel (6375)and install the bolts tighten the bolts in two stages. Stage 1: Loosely install the bolts Stage 2: Tighten the bolts in sequence shown.
Install the transmission. For additional information, refer to Section 307-01A (4R70W) orSection 307-01B (E4OD).