Lockers/limited slips for racing
> Except for about eighteen months in
the mid-1970s, my TR3 has been a RACE CAR
> all its life. I have logged about one hundred and seventy-five
> The car came with a Detroit Locker and a 4:1 ring and pinion.
It is an
> incredible piece of equipment. I understand it was developed
for a light
> truck, so it is VERY stout. A couple times each year it will
make a noise
> like the rear end fell out, that is because it is mechanical,
and has no
> clutches. But when we take it apart and examine it, it still
looks like brand
> new. I can't believe it. I love it.
> Last year we won the E-Production
part of SVRA's BADGER 200 at ROAD AMERICA.
> Don't be impressed...two hundred miles is a long way, and
we just broke later
> than everyone else. While we were still running at the end,
we had a broken
> ring and pinion. Again, when we rebuilt, we found the Locker
was just fine.
> Bob Wismer and I are running a Quaiffe
in the Thunder Bolt. It is similar,
> and smoother. It is more modern, and has clutches. I am sure
it is easier on
> the drive line. We like it, but have not run it long enough
to judge its long
> term dependability, and based on my TR3's experience, how
important can that
> Last summer we set up two more axles...a
4:55 and a 3:73. The 4:55 has a
> locker in it, and the 3:73 is welded. I know the vast majority
of old TR
> racers will tell you a welded rear end is 'the way to go'
(and that is based
> on economies), but I can't subscribe to that. All you have
to do is push a
> car with a welded rear end around a parking lot to decide
a 'Locker or
> Quaiffe' is money well spent.
> Bill Dentinger
I have a couple of comments on the rear locker situation. First
off, the competition department paid for the tooling to make the
lockers for all the Triumph cars. I know cause I had to find the
money to pay for them.
Now on to handling of the various lockers etc. The locker is
strong, dependable but will give some under steer. The clutch
type diff will have a lot less under steer but is not as strong
driving out of the corner cause it does slip and it also produces
a lot of heat because of this slippage. On our Sebring cars in
1966 it was necessary to run a diff cooler cause in an hours practice
they all (four) burned out the pinion seals and leaked like sieves.
I have run TR-3' s with a welded diff and if you want under steer
baby this will give it to you. But boy you talk about drive off
the corner, when you have it set it beats anything. The welded
diff stops you from pointing the front in early without being
on the gas. If you are good this is okay but if not you are still
on the gas when you are gone. By choice I used the Detroit locker
because it was always there and did the job. Work out the little
under steer with suspension settings.
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