I used a lot of Simple Green and various brushes to get everything clean. I sat there with a bucket of water, would squirt it down with Simple Green, let us sit for a few minutes, then scrub. Most of the time I used a tooth brush. Sometimes a small dish brush. It took a long time but was worth it. Lots of nooks and crannies!!!Got tired of getting nothing done this week so I finished removing the motor harness and de-greased/pressure washed the motor. It turned out ok. Nothing amazing ... but the transmission in particular was nasty and now it's passable, so that's a win.
Good to hear it's helping out!
I'm finding to ground lugs are a bit different on my harness, too. I was planning to run my own larger-gauge ground wire regardless, but I'm finding all the ground wires to be a bit confusing. Some go to sensor connectors or other connectors, and some go to the fuse block. Tough to tell what's what.