What is the process of changing a 64 or 66 trany to t-4, 4.12@p,.082 4th gear?
Who does this kind of work?
Emilio
The first step is to get yourself a 71-72 DSC IRS trans, or a 71 or later swing axle. Call up Airspeed, I think they have a few cores like this.
If your existing core has O-ring type side covers, it will provide all the parts needed to convert the IRS trans to swing.
To get a .82 4th gear, you need to find one in a 68-71 Bus trans. I don't know if all those years come with a .82, but at least 2 versions exist in those gearboxes.