My brother has an 05 auto with 6,000 miles. About a month ago he installed an ATS 5 star converter and valve body. Everthing seemed to work ok. He just installed a Smarty prgrammer. He says now when the trucks transmission is warmed up, the first time he puts it in gear after startup, it will not shift out of 1st until he fully stabs the throttle. After the first time it works fine. If it's cooled down it does not do it.
Any ideas?
Any ideas?