Bobatsuperior

iTrader: (14)

Okay heres the rundown , its my 99 A4 SS with longtubes ,catback, lid at tune(problem was happening before tune) 1st gear absolutly perfect goes straight to 5600 before it shifts, then 2nd between 4000 to 4500 theres a bad studder you can fell and hear, ones it passes the car fells fine and pulls hard. A friend of mine thought it was valve float but i changed the spring's with comp beehives and its still there. Ive also changed the plugs no difference. There are no codes witch is way strange to me, any help would be greatly appreciated. Thanks