About a month ago I started noticing a small engine oil leak on my 2004 Sequoia Rwd. I believe it’s the rear main seal but wanted some input here. I’m posting photos. The leak looks to be right where the tranny and engine bolt together just behind the rack and pinion/front swing arms frame support. It only leaks from the joint that looks flat on the front side. Opinions/input? If it is the rear main seal, any idea what this would typically cost to repair (mechanic), or what a DIY mechanic (i.e. me) would be getting into should he take this on himself? Thanks in advance!