Have you ever tried the Dorman? I'm not advocating for it, just genuinely curious.I work on a fleet of a few hundred promasters with 3.6s. Every one is leaking, it’s to the point where I’m only replacing them when they’re leaking onto the ground (which means the valley has filled up with about 3” of oil, flowed down the back, down the bellhousing, filled up any cavities and places to pool on the transmission case and finally spilled over and drips to the ground).
if I worked in a real shop, every one would be getting written up to replace. Being a fleet shop, and I’m 1 of 2 guys willing to do the work, I just can’t keep up.
Ours are all 2018s with about 18-30k miles on them.
99.999% of the time my policy is to run from Dorman anything but this might be an exception