Got under the car last night and saw a few things.
The crappy black insulation on the trans tunnel had fallen down and rubbed against the vibration absorber and driveshaft. It was enough contact to remove the paint from the driveshaft in a few spots (I could run my fingers over it and feel a noticeable change). I fixed it so that it wouldn't rub any more.
There didn't seem to be any side-to-side or up-to-down play in the driveshaft indicating a bad CSB. However, the guibo had a lot of cracks in it (no cords showing) and I know that needs to be replaced.
It's still really weird that the vibration is only in 4th gear. The pulsing does speed up as I go through the rpms from 2500 to 3200. __________________ ~Dave~
98 328ti Morea Grun slicktop
11 128i space gray slicktop
13 JGC WK2 Deep Cherry
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