I figured it was in the rear end. And for the modding under warranty thing, the car was done all at the same time. I was told it needed a new shaft so it got that and every other part it has at 600 miles. I don't believe they used a analyzer. Brooks where are u at there days?? It feels like something you would get from a bad u joint.
Did the vibration start with the first gear change? How low did you go with the gears? If you have changed everything in the rear and driveshaft then I would look at the engine and tranny. Lower gears means more RPM at 60 than what was with stock gears. Possible harmonic balancer or something on the engine that rotates, just another thought to the problem.
When the vibration is strong at say the 80 point, have you tried pushing the clutch in, or easing it into neutral to see if it goes away or lessens. It will help in diagnosing if you find this part out.
My 2012 also has an annoying vibe from 60-80. I've had the tires rebalanced 3 times at multiple places, and it didn't seem to help. I can feel mine slightly through the steering wheel, but more through the seat(the empty passenger seat will shake visibly at 70-75).
Mine is bone stock driveline wise, with the wheels and tires being the only thing I've changed to the car, but they are OEM Ford wheels and according to multiple shops, they are not out of balance.
The rear end was bent when it was hit a few weeks ago, so I've got my fingers crossed that all will be well with the new rear.
Comment