Rick-
Some notes for the group: I have two TR4A's, both with independent rear,
plus a pumpkin I took out of a third TR4A. If it was only an option, it
was certainly a popular one. I saw far more IRS cars than solid axle
ones. Maybe it's something to do with the crowd I hung out with....
BTW the TR stuff is for sale; no race parts but 36 years of
accumulation. I gotta put a list together.
I also own a '70 Vixen which does autocross. Not so active since I take
issue with the local SCCA insistence on too slow and too quiet, but the
car and I are still capable.
Best,
Skip Gurnee
S.D. Ca.
Rikrock@aol.com wrote:
>
> In a message dated 01-02-07 16:48:38 EST, joospeed@sideways.freeserve.co.uk
> writes:
>
> <<
> Actually, the TR6 only had an independant rear end -- semi-trailing arms.
> So did the
> TR250 (the non Lucas PI version of the TR5). But the TR4a had a solid rear
> axle in the
> USA because Leyland didn't think we would pay for the independant rear nor
> notice the
> difference. IRS was an option in the USA.
>
> I doubt the solid rear axle Quaife diff would fit in the IRS diff case, but
> who am I to
> comment? I dont' know.
> >>
>
>
> Hello,
>
> Believe it or not, the differential carrier from ANY Triumph TR3, 4, 4A (both
> IRS and solid axle) and TR 250 will fit the TR6 case. Same for the ring and
> pinion gears (starting with TR3 #13046)
>
> They are ALL interchangeable. Say for example you happen to come across
> someone selling parts from an old Triumph TR4A solid axle racecar, and he has
> a 4.55 Detroit Locker.... the ring and pinion gears and the locker would be a
> straight swap into the TR6 diff case.
>
> In this situation, all you would have to do is remove the internal thrust
> button from the Locker. The internal thrust button is a spacer which goes
> between the inner ends of the axles on solid axle cars. The thrust button
> must be removed when the unit will be installed on an IRS car (like the TR6
> or TVR).
>
> Same thing applies to the Quaife. Since the LSD unit Quaife sells fits such
> a wide range of Triumphs, I think they sell it with the thrust button
> installed, but I'm not positive. If it comes with the thrust button
> installed, all you have to do is remove it and you're good to go!
>
> And if you find that guy selling old Triumph racer parts, send him to me! ;>)
>
> Rich Rock
> Pottstown, PA
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