A few years ago, I had the imported knock offs tested on a Rockwell machine
at Cornell. They were considerably softer than the NOS in addition to the
dimensions being off by aprox .050. . I have heard them refered to as being
made of "butter brass". A term which does not endear them to me.
Hopefully in the future someone will have replacements made properly so we
can support the toys for years to come. Until then, save all old synchros.
Russ Moore
----- Original Message -----
From: Richard Good <goodparts@redrose.net>
To: 'FOT@AUTOX.TEAM.NET' <FOT@autox.team.net>
Sent: Tuesday, April 03, 2001 10:50 PM
Subject: synchro rings
> I have some NOS TR6 synchro rings and some new thin ones. When placed on
> a used gear the NOS ring left a .045" gap to the gear. The thin ring
> rode closer to the gear leaving only .035" gap. I also noticed a
> difference in the tapered contact surfaces. The surface of the thin ring
> was machined to leave only very sharp edges to contact the tapered
> surface of the gear but the NOS rings had some flat surface left to
> contact. I would expect much greater life from the NOS ring. Checking a
> pile of used OE rings revealed some that still had about .035" gap. I
> guess I would feel better about using one of those rather than a new
> thin one if the teeth still look good.
>
> Richard Good
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