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Do you have synthetic oil in it? I replaced my old gear oil with Amsoil synthetic and it leaked all over and would not shift smoothly. Went back to regular gear oil.



i went from a 75-90 gear oil to redline mtl and it now shifts WAY better. from now on that or penzoil synchomesh is all ill use. the tranny does not leak with synthetic either. all my gaskets and seals are only 2 hears onld though.



Redline is all i use. No leaks , great shifts. In Extreme cold a cold 4speed will be a sticky 4speed