Join Date: Feb 2011
Location: Colorado Springs, CO
Recently I changed out a switch on the shifter, as intermittently could not tapshift.
There are two (actually 3), switches in the top of the shifter, push to the side actuates a switch that 'tells' the car it is in tap shift, then the upshift downshift switches front and back.
I'd have to guess that first switch isn't telling the car it's tapshifft time.
I didn't want to replace the whole shifter, just the switch. I purchased a whole shifter assm eBay, then practiced on that to figure how take apart just what I needed and replace it. I had to pull the console, but it wasn't that bad.
Again, this is just my guess on your issue.
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