Yer link is no good, is this it?-
http://www.jcwhitney.com/autoparts/P...X/appId-388547
My transmission shifts hard, especially when cold. Also, when it shifts into overdrive I feel a small shudder then a second later the RPMs drop down. This is after a transmission flush at the dealer. I may try some of this stuff.
It's also available here:
http://www.lubegard.com/automotive/f...pplier_us.html
Dale