~79 model trans.
When shifting from 1st to 2nd, what valve(s) actuate to apply the servo? And for the 2-3 shift, which valve(s) actuate to release the servo? I am having a problem that really looks like no band apply and I want to troubleshoot the vb.
Under load, slips 1-2, and flares on 2-3. Trans is fresh and vb NOS from Ford.