I’ve noticed a leak around the pan gasket and where the bell housing meets with the motor from near the top was wandering if Lucas trans fix will affect the Allison? It’s a 2001 2500hd 8.1 with the Allison 167k miles
Not sure I’d recommend that. If it is truly the pan gasket leaking, that’s rather unusual since the factory one is a rubber over steel one. I just took my cover off this weekend and the pan gasket was not leaking. The drain plug leaked a little bit and the electrical connector O-ring was leaking, but not the transmission oil pan. The leak between the engine and transmission is most likely the engine rear main seal. Mine is doing the same thing.
Think I might I live with it for a bit until I buy my next house, I haven’t had to add oil yet been checking when it’s hot. I might disconnect that harness on the outside and try to pull the other end from the inside and get it seated better
If/when you do rear main, do the oil pan as well. Terrible design from the factory where the back of the pan has less surface area and can leak if you park on an incline. Speaking of, you ain’t parking on an incline are you? That can make it look like your rear main is leaking when it’s the oil pan. If it isn’t leaving pancakes on the ground, it’s either not the rear main or it ain’t time to worry about it yet.
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