So when my original BRF broke ( no reverse) rather than do the right thing and get a CK trans, I bought a fully rebuilt fresh Art Carr Trans "out of a 9-sec GN". It was from a "friend" (not a GN guy in his defense) and half the price. The code read AA but it's got the billet servo, hardened input shaft. The pan was beat up (from being moved around my shop for 2yrs) so I decided to reuse my old one. Except the one from the AA would not fit on the BRF. Should've been red flag right there. But no, I proceeded. I really just don't like how it shifts. 1-2 is firm on light throttle, and 2-3 is ok. I really don't even feel 3-4. It has only 300miles of light use and I've only stomped it from a roll, which it burns out through 3rd anyway. I just ordered the Superior (K2004 HP) shift kit. Would I be better off installing that stuff in my BRF valve body and then installing it in my fresh trans? Or should I just install the BRF valvebody and leave it alone? Or will the Superior kit correct the valvebody in the AA? What is this 3rd gear switch in the BRF necessary for? Sorry if my questions are stupid, I'm not a trans guy. And yes I've watched multiple videos on the detent cable adjustment. I'm 99% sure it's hardware. I want to get the problem alleviated while the trans is still fresh to prevent damage. Thanks in advance for the input!