Posted: Fri Jul 21, 2006 10:00 am
cool, thanks mate it's nice to learn new things, I was gunna run a D/C with an offset diff but now I won't cheers
This is the opposite of what I was told by drivshaft services. You will need a D/C joint at t/case end and the pinion MUST be parallel with the t/case flange to cancel the vibes.AnthonyP wrote:yes that is entirely correct... so long as it doesnt have a double cardon joint at only the tcase end.mico wrote:even then, I can't see how it makes any difference the angle of the uni's doesn't really matter as long as both ends are the same, ie. the pinion and the T/case output are parrallel
Both ends of a driveshaft have to opposed each other in order to cancel out vibrations (you obviously already know all this)... a double cardon (at tcase) with a sinlge uni (at diff) with offset diff to tcase input/output do not accomplish this.
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for justinshere:
Antoher way to look at it is as the shaft is rotating each individual uni is actually decelerating and accelerating twice per revolution.
So with a stadard uni drive shaft (on U joint at each end), one U joint will be decelerating at the same time and at very near the same rate that the first "U" joint is accelerating (assuming all inputs/outputs are parralel), resulting in a smooth power flow through to your pinion (which will cause no vibration). (taken straight from tom woods)
so dude, if i was you id go the 80series full floating rearand run single (but big) U joints at each end of the drive shaft and not worry about the diff offset.
Just make sure the shaft is balanced correctly and that your diff input is parralel with your tcase out put![]()
Luv
Grimace