Re: Moser lube sealing: I built a frame to mount an Avanti body with Corvette C4 running gear. Mission creep has brought it to an LS1 and ZF six speed. The IRS differential has gone from Dana 36 to Dana 44.
That case/carrier is heavy cast aluminum, likely permanent mould 17-4. Challenging the seal is torque load and lateral suspension loads. Dual fastener function, clamping and mounting. GM uses silicone, no gasket.
Success is uncertain, I disassembled the 44 to find orange and black silicone. Questionable technique. Is the Moser gasket critical to dimension stack-up?
jim