The three bolt mounting flange on the box is against the inside of the frame rail. There is a slight space I think because there are bosses at each mounting hole. So you are saying solid type grease is oozing out of that crack right at the frame? If so, sounds like T-nix is correct. The kit includes that seal I believe. After fixing, fill it with whatever lube suggestion sounds good to you. Cornhead is what many people use. The kit has two bearings sets, two gaskets, two bushings, one seal. Lots of people say Penrite. That's just an oil company from Australia. They have 0,00, no big deal. It's funny that one of the uses listed for it is "leaky gearboxes". Important: get whatever is in there, all out. Self leveling relates to temperature performance. The modern greases have good high temp performance and the term for low temp is now known as the Low Temp Torque value. If I am interpreting what I read on the good old webnet correctly.
