IRS leak on one side on 1990 Ford Thunderbird SC

Leaks on one side only between wheel and center
there is also a small thump when starting out.

Asked by for the 1990 Ford Thunderbird SC
1 answer
Obviously the leak needs to be stopped first and foremost. Sounds like an axle seal. The thump could be anything from a mount that's worn to a universal joint issue to a ring and pinion issue. A good inspection will figure it out.