Mike,
"PowerLock" is the Jag term. I believe it was standard on all of the "E" types,
and optional on the sedans. I'm using one behind a 427 and am pleasantly
surprised
that it is holding up well.
Craig Wright
MWood24020@aol.com wrote:
> In a message dated 2/28/99 4:51:26 PM Pacific Standard Time, laifman@flash.net
> writes:
>
> << Next question: Can you really tighten it enough to prevent
> sliding on the leaf spring? What keeps the clamp from
> sliding on the leaf spring on high torque applications?
> How does it return? Should it slide?
>
> If it's clamped hard enough, does it distort the leaf
> spring., causing premature failure (hard to get new
> springs).
> Does the continual flexing fatigue that leaf spring?
>
> Of course the weld-on type is unequal length with the spring
> arc, which causes it's own problems, but the front weld can
> be cured with a doubler.
>
> Your thoughts?
>
> Steve >>
> Steve-
> I'll give your questions my best shot, but as you probably know by my other
> posts to this list, I'm kind of a seat of the pants guy; i.e. no engineering
> expertise.
> Anyhow, the front clamps are just tight enough to keep them from rattling.
> Mine don't seem to move around at all, at least that I can see by inspecting
> them. I have never considered fatigue of the leaf, but I run two primary leafs
> (a crude way of stiffening the rear springs) and don't see that as a real
> possibility. I'm not sure how to account for the lack of fore/aft movement, it
> would seem that either the clamps are tight enough to prevent it or maybe with
> my stiffer spring set-up (with the back of the leaf pack unclamped, which I
> copied from the old Mopar "Super Stock" springs) the pinion angle doesn't
> change much. After 6 years of use, including lots of autocrosses and track
> work, I haven't encountered any problems.
> Now a question for you: Were the Jag/Salisbury posi's labeled "PowrLock"? Or
> was that a Spicer term? I was trying to remember when I responded to the
> original question. I do know that when I got my posi, it was NOS Rootes, still
> in the box. I just can't remember who made it or what it was called...I do
> know I got stabbed, paying $350 for the piece!
> Mike
--
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