[torsen] Driveshaft angularity info needed.

Bernie Benz b.m.benz at prodigy.net
Fri Nov 2 01:45:32 EST 2001


I believe that CV joint life vs shaft angle is similar to that of U joints,
an inverse function.  The larger axle half shaft CVs (inners) see larger
angles than does the rear prop shaft CVs, but are running at about 1/4 the
speed and twice the torque (assuming 4/1 final reduction).  So what? I don't

IMO, on the rear prop shaft you can adjust the engine and rear diff
alignments such that the CVs see no static angle, and only need compensate
for elastermeric mounting deflections.  See my forwarded post.


> From: torsen-request at audifans.com
> Reply-To: torsen at audifans.com
> Date: Thu, 1 Nov 2001 12:04:26 -0500 (EST)
> To: torsen at audifans.com
> Subject: torsen digest, Vol 1 #109 - 2 msgs
> Message: 1
> Date: Wed, 31 Oct 2001 17:38:54
> To: torsen at audifans.com
> From: Jeffrey Goggin <audidudi at mindspring.com>
> Subject: [torsen] Driveshaft angularity info needed...
> I've been trying to determine how much lifespan/torque capacity is
> sacrificed by running a CV joint at an angle instead of straight but thus
> far, my research has come up empty.  Does anybody know the answer or able
> to tell me where I can find it?
> The reason I ask is that I've decided life will be much easier if I can
> move the engine/transmision combo on my V8/UrQ project backwards by 2-3" as
> this will open up the same amount of space on the front of the engine and
> let me install a factory a/c condensor instead of fabricating one (read:
> having one <ka-ching> fabricated) to run behind the valance.  I think it
> will also improve the car's weight distribution and make servicing the car
> in the future a little bit easier.
> Yes, I'll have to fabricate new tranny mounts, shorten the driveshaft and
> shift linkage, etc. but all of this is pretty straightforward stuff that I
> can handle myself whereas fabricating a two-piece a/c condensor and
> associated hoses, etc. is something I can't handle at the moment.  The
> transmission tunnel appears to be large enough that there shouldn't be any
> interference problems there (especially as I'll probably end up lowering
> the trans/engine slightly in the process) and there will still be plenty of
> room -- well, enough room -- between the engine and firewall to work on the
> steering should that ever be necessary.
> Anyway, if anybody has any hard data about driveshaft angularity and its
> effect on CV joints, I'd appreciate a pointer.
> Thanks!
> Jeff Goggin
> Scottsdale, AZ

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