purchased a used mobiletek v.b. from another org. member. once it is going down the road shifts hard like it should. running redline syn atf. but during initial take off the car has to tac up to take off. also happens when decelerating and go to give it gas and hasto tac up again to go into gear. mobiletek hasn't returned my email. i followed all the mobiletek instructions. fluid level is good. talked to the org. member, said he never had a problem with it. seems to have an internal problem? need some input. v.b. is out of a 98 max and is going in a 95 max. thank you!!

NEED SOME HELP FROM THE EXPERTS!!!