I am very sorry your post remained un answered for so long. Auto-Rx Plus is a cleaner as such it is green chemistry and completely safe. If dirt,contaminants, were the cause of the shift problem, than yes we could have fixed it.
For the price of one bottle it would have made sense to try Auto-Rx Plus before any other option.
-- Edited by Frank on Wednesday 19th of June 2013 01:50:19 PM