looking at the 6r80 I am having doubts that'd fit without some major tunnel work, the thing is massive! Although that would be really neat.
I will likely be salvage yard hopping next week so I'll see what is available whether T-56, TR6060 or 4R70W.
I know the T-56 and TR6060 having 2 over drives (and available .50:1 OD on some models) would complement the 3.73 rear I have, but what about the 4R70W? What RPM would I be looking at around 80mph? I know there's calculators for this but there is more than just tire height and gear ratio when calculating rpm at a certain speed. I just wouldn't want another 4-speed if it runs much more than 2.5k rpm at ~80mph. Someone here I'm sure has real world experience with 4R70W and 3.73.
Once again, does it matter if the Tremec is out of a Ford, Dodge or Chevy for the swap?
I was drawn to the idea of a T-56/TR6060 because a buddy of mine had an LS3 swapped/T-56 trans/3.73 rear in a heavy 1st gen CTS-V and could cruise at 80mph at less than 2k rpm! But if that truly involves tunnel surgery (I thought it didn't on 67-68?) then that kills it for me
Going back to the 4R70W topic, what is that stand alone unit like for you HoosierBuddy? When you say adjusts shift points does that include:
max rpm before up shifting
how many gears it drops with throttle percentage
when it shifts at part throttle
how does it know what your throttle percentage/load is without a TV cable like the AOD?
I am curious because 98-03 mustangs are super common in my local salvage yards. But why a v6 mustang? are 4R70W from a gt or pickup not any stronger?
Apologies for the bombardment of questions, but I'd much rather not want to switch transmissions again
*side note, I forgot to mention this is a 68 coupe