tarquin1867
Member
Totally agree about the engineering and the comment on GM suspension. With the roads round here its heart in the mouth time for the nearside front spring as i have already had the OS one broken @ 28000No amount of greese imbalance in volume/weight is going to throw a drive shaft out of balance. The mass of the drive shaft to just too high compared to the greese and diameter/radius and thus centrufugal forces are just too low.
However greese in the joint will have a dampenning effect as well as a lubrication effect.
What puzzles me about the tulip / spider joints is why are they being used? For many years the existing Fiat inner CV joints used on all previous large engine Fiats have proved to be utterly reliable. They are made with large ball bearings etc. and have an almost zero failure history.
I tend to get the impression that the GM gearbox and suspension system is just too week and floppy and lateral drive shaft movement so high during cornering etc. that having 3+ inch long tulip tunnels in which the spider can travel up and down was the only way they could get the system to hang together !