I installed Yank 2600,corvette servo & billet od servo.On light to moderate throttle I experience a clunk from 2nd to 3rd.Will a shift kit or a reprogramming kit like superior fix kits help.I only want firm shifts not tire chrpping shifts.

 

i got the same clunk. i learned to live with it. it only happens at mild throttle. WOT or good acceleration i don't notice. it shifts smooth then

 

same here

 

i wonder the same thing, will a shift kit eliminate the clunk?

 

Mine doesn't clunk, but it slips and does the shift twice. Like you guys, it is only under light acceleration and only about 1 out of 3 times or so. It has been doing it for 80,000 miles though, so I guess it isn't serious.

 

mine does the same clunk, but i have also noticed the clunk from 1st to 2nd when at low speed. sounds like a ujoint going bad.