I broke the small stub axle on the Grp44 TR6 at Savannah....actually Jim
Netterstrom was driving at the time...and depending on when it breaks...can
result in either a gerarbox full of neutrals or a dramatic change in
direction...determined by the driving wheel. I run a welded up locker, and we
are generating more HP and torque than the engine ever did in 1971-1976. The
differential is, as I enderstand it, the old TR4A diff, and the small stub
axles within the housing struggle to take the torque we now develope. We
inspect the diff after every race, but I do not have a "redesign" answer.
There appears to be a lack of meat in the housing to allow increasing the
diameter of the shaft, so we are considering addressing it from a metallurgy
angle. I am not exited about changing the design or configuration as I do not
feel that it is in the spirit of "vintage" racing (depending on whatever
someone's interpretation might be). Any suggestions? At least the TR8 has a
Franklin rear end with a Ford 9" pumpkin, so the rear end on that car is about
as bullet proof as one can get. Bill Warner
"ALAN N. TAYLOR" wrote:
> At 10:39 AM 7/30/00 -0400, John Lehman wrote:
> >FOT,
> >
> >All this talk about breaking axles has me wondering what I should be
> >checking on the independent rear suspension of the GT6. What caused Jeff
> >Mennen's rollover? What's the weak link here, Jack?
> >
> >I know that with irs the axle is actually...what?...a spindle? The half
> >shafts drive the wheels but the a-arms(?) carry the load?
> >
> >I know for a fact that my car has been on its roof but don't know why or
> >how...
> >
> >John Lehman
> >'68 Triumph GT6
> >
> >The same basic problem is in all post-war Triumphs. None that I can recall
> came with a floating axle/hub. (even TR8's) I broke an axle in a MKII
> Spitfire at IRP in the late 70's and took a wild ride and broke one at
> Savannah in an IRS TR4. Someone made a SCCA approved heavy-duty set up for
> Spit/GT6 but I cannot remember who. Anyway I have my axles crack/fatigue
> checked every season , but my new car will have something other than
> original in it. Alan Taylor
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