Hi Guy's, I've had a TransGo shift kit installed in my TH350, Trouble is, now it doesn't downshift when I put the pedal to the metal anything above 45mph. I'm impressed with the snappier shifts when changing manually. The guy at the transmission shop has asked me to supply another kit but it seems a shame to go thru it all again when it is just the downshift. The downshift cable I understand is self adjusting on the '81 and that has been done. Is there anything else that can be done?