Baaaaahhh now im even more confused!?? 21/23 splines v6 3.0 3.4 chains geardrive adapterplate tranny adapter top shift forward shift 2.28/4.70... my brain is melting and my eyes are getting crossed! Lol sorry i have ADD;)) ...that link is for the later 3.4, what i want to do is use my 3.0 chain tcase behind a geardrive tcase???  ...or maybe its cheaper to buy one adapter and just run a single geardrive tc with 4.70??? then i wont have to modify my xmember or drivelines...