If you leave the kickdown unhooked, the trans will shift at about 15-20 mph no matter what throttle you give it.
Very important on a Powerglide.
Another thing I have done in the past when linkage broke, is to wire the PG kickdown lever up to the MPH you want it to shift at.
Last edited by tlowe #1716; 07/11/10 02:23 PM.