How are you doing guys?
I have 06 Tl with 112600 miles on it. I have a vibration on my Tl when driving on 2000-3000 RPM 30-45 mph. It happen when the A/C is on most of the time, especially if I'm going uphill. Time built was changed on 108000 miles. Would you please let me know if you guys have any idea about my problem? I would appreciate it.
Thanks.

 

I might suggest that your problem could be due to a worn, inner CV (constant velocity) joint...either right or left side...right side more probable. I'm original owner of a 2006 TL 5AT, w 120K miles, and noticed onset of vibration upon accelerating while passing through 20 - 30 mph. It sounds like we share similar symptoms. I just had the right side, inner CV joint changed w an original Honda part, and that seems to have substantially lessened the problem. It's probable that the left joint also requires changing. You can take car to a dealer and pay full rate for repair, or purchase the parts kit(s), and have a reputable mechanic do the work, it takes about 2-3 hours per side.