2011 Mustang GT, lowered on H&R race springs with Ford Racing adjustable Panhard...
Recently installed an FRPP 1-piece driveshaft along with Whiteline adjustable LCA's, and J&M LCA relocation brackets. After noticing a new/different vibration, I put in on an alignment rack to adjust the pinion angle per the BMR video specs (3 degrees lower at the rear end vs. the trans angle with factory UCA), but the vibration did not seem to change.
The vibration I am getting, I feel through the floor/console/seat under moderate to heavy acceleration load from ~3k rpm, and getting more and more noticable and more coarse at higher RPM. If I push in the clutch after a run to redline and just coast, the vibration does not immediately go away--it seems subside over the course of a couple seconds as rpms drop. Just coasting along or cruising in gear at the same speeds, I get no noticable vibration.
My initial thought was pinion angle, which is why I adjusted it, but that seems to have made minimal / no difference. Is this normal? Could it be engine harmonics I am feeling now that the heavy stock driveshaft is out of the mix? Is there something else I should try?
(I also have a Whiteline adjustable UCA that I could put on, but have not yet.)
Recently installed an FRPP 1-piece driveshaft along with Whiteline adjustable LCA's, and J&M LCA relocation brackets. After noticing a new/different vibration, I put in on an alignment rack to adjust the pinion angle per the BMR video specs (3 degrees lower at the rear end vs. the trans angle with factory UCA), but the vibration did not seem to change.
The vibration I am getting, I feel through the floor/console/seat under moderate to heavy acceleration load from ~3k rpm, and getting more and more noticable and more coarse at higher RPM. If I push in the clutch after a run to redline and just coast, the vibration does not immediately go away--it seems subside over the course of a couple seconds as rpms drop. Just coasting along or cruising in gear at the same speeds, I get no noticable vibration.
My initial thought was pinion angle, which is why I adjusted it, but that seems to have made minimal / no difference. Is this normal? Could it be engine harmonics I am feeling now that the heavy stock driveshaft is out of the mix? Is there something else I should try?
(I also have a Whiteline adjustable UCA that I could put on, but have not yet.)
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