Sorry if I missed it but what were you running in the trans prior to this?Okay, I filled the trans with Amsoil ATF. That's what I ran in my other Tremec and it shifted flawlesly.
Lets hope something magic happens.
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There's a cheap upgrade for that, but for the life of me I can't remember where to find it, it involves removing the stick and replacing some of the bushings, been about 8 years ago, you may have to google it. As I recall, it was relatively easy to do.No shifter stop bolts in a magnum that I know of…