got a C4 in my 65 mustang conv.V-8.Its got a lazy 2-3 shift.any body know if this could be a easy fix.pull away very easy,shifts good.pull away little hard,slips in the 2-3 shift.did the modulator.no help.
Not to bear sad tidings but it could be the intermediate band and clutches are at end of life, or the Governor or intermediate servo are sticking. The later two are easy to do with the trans in the car. The bands clutches are not. Don't forget to drain the torque converter too. Type F should be used if that's what you've been running.