View Single Post
      05-01-2012, 07:52 AM   #11
doughboy
Major General
doughboy's Avatar
United Kingdom
125
Rep
6,643
Posts

Drives: 2016 M6 Gran Coupe LCI
Join Date: Jan 2009
Location: UK - Midlands

iTrader: (2)

Quote:
Originally Posted by xenon View Post
Prop-shaft doughnut.
+1, The half shafts / diff / prop / gearbox output are about the only bits left that are consistently involved in all the scenarios you mention.


Maybe a half shaft issue though, as that is slower than the prop and off centre would more likely cause a fore and aft rocking?

As the diff ratio is about 3.5:1 the prop shaft will be spinning 3.5 times faster than the wheels....


At 20mph, about 8m/s =

wheels / half shafts / hubs / diff input etc about 4 revs per sec

prop / gearbox output about 14 revs per sec
__________________
E90 330i 6MT gone. E91 335i 6MT gone. AMG E63 Estate gone. M6GC current...