To give backstory to this title, I've had my 2017 RC350 F-Sport since 2023, and now it has 70k miles. I caught this leak but noticed it at 67k miles, but I didn't have time to mess with it in October or December because I was in job retraining for my next job. When I bought the car, it had a powertrain warranty for 69k miles, but I could not find that paperwork anywhere since I had purchased the vehicle and moved to a different state. I want to ask in this thread if anyone with an Rc350 has had this problem. I didn't think I would run into a rear main seal leak with a Lexus.

 

Are you sure the rear crank seal is leaking and not the timing cover?

 

When I was getting an oil change at the time the mechanic showed me where the leak was coming from which was where the engine and transmission meet

 

If confirmed then you'll either be pulling the engine or dump in some snake oil like AT-205.

 

It's already confirmed. Yeah, the engine will sadly have to get pulled to fix it also; I found that out when I was getting an oil change at Firestone and looked up under the car with the mechanic. I've already tried pouring at-205 or something close to it when I bought some at O’reileys