TAC Meter

Hello fellow 3SX'ser.
I was wondering if anyone out there is haveing problems with their TAC meter? The problem that I am having is that it is not measuring the RPMs correctly. The engine is strong (knock on wood), I have no white or blue smoke coming from the tail pipe and I just had a tune up at the dealer and that is when they indicated that the TAC motor will need to be change soon.
Has anybody out there had this problem? :dunno: Is there a do it yourself fix for this? If so what are the steps and where can I buy the parts? Thanks

ive never had that prblem bro but im pretty sure ur gonna have to take out the gauge cluster to do it. and that requires taking out the whole dash. maybe theres another way.. do a search on stealth316.com that site is really good and has alot of tips and walthroughs. good luck man
SAMSUNG-SGH-I617/1.0 Mozilla/4.0 (compatible; MSIE 6.0; Windows CE; IEMobile 7.6)

Thanks for the info.