Transmission not upshifting
#1
Instructor
Thread Starter
Transmission not upshifting
Hi guys, please help
I've got an 2004 with A4 trans. With the car in drive, it pulls off normally but it won't change gears, just revs up. If I put it in 1st or 2nd and shift manually, it changes every time. I don't know what the hell it could be. I also have service traction control on dic panel, if that helps. I've noticed every since I had the car that there's a noticeable hesitation between reverse and drive and vice-versa. Anybody got a possible solution. Thanks in advance for any help.
I've got an 2004 with A4 trans. With the car in drive, it pulls off normally but it won't change gears, just revs up. If I put it in 1st or 2nd and shift manually, it changes every time. I don't know what the hell it could be. I also have service traction control on dic panel, if that helps. I've noticed every since I had the car that there's a noticeable hesitation between reverse and drive and vice-versa. Anybody got a possible solution. Thanks in advance for any help.
#2
Le Mans Master
Member Since: Aug 2005
Location: CA.
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St. Jude Donor '13-'14-'15
Way too vague to diagnose----I would 1st sort out the TC issue most often a fouled wheel speed sensor that could be on any of the 4 wheels---A TC code could prevent shifts as the wheel speed sensor input is used as a reference to make sure the shifts happen at the correct speeds---
However it can be something as simple as a computer glitch---Dis Connect the battery negative overnight to allow any glitch to unload--then try it again
However it can be something as simple as a computer glitch---Dis Connect the battery negative overnight to allow any glitch to unload--then try it again