I've narrowed down the slight drivetrain vibration (between 1,200 & 1,400 rpm) in my '04 to the transmission. Any suggestions on what could be the problem in the transmission? Thanks in advance for any help!!

 

My two cents. It's an 04, I wouldn't even worry about it. I'd take it right back to the dealer and have them FIX it!!

 

I'm with '01screw, take it in! However, it's very rare for a vibration to come from a transmission. If something's out of balance, it would get much worse with more RPM. There isn't anything in the trans. that would only vibrate from 1200-1400RPM. Tell us more. Does it do it in neutral? Does it do it in all gears, or just at certain speeds?

 

On my 00 Lariat i get a vibration when it upshifts or downshifts from overdrive to third. I suspect torque converter but i'm not sure. I plan on starting my own thread with this question, see if anyone else has the same problem.

 

Shudder. Take the 2004 to the dealer, it won't be old fluid.