I found a nice article on the VTR web site that puts a good light on
the TR Synchro problems. Written by Bill Kelly.
http://www.vtr.org/maintain/synchromesh.shtml
Pay close attention to paragraph 3. The tension of the spring loaded
balls determines how much pressure is applied to the brass rings and
then to the gear. Weak springs and not enough pressure to match the
speed of the gears. The higher the RPM when shifting and the more
work they need to do. The springs are cheap and easy to replace while
doing the tranny.
Dean Tetterton
On Mar 20, 2013, at 1:17 PM, Jim Henningsen wrote:
> List:
> I have a jtype od transmission that was rebuilt about 8 years ago. Started
> having third gear grinding issues on hard acceleration and deceleration
(auto
> cross and spirited driving) so had new German made brass synchros installed
> about 2 years ago. Got rid of Taiwanese synchros installed during original
> rebuild as we thought that was the issue. The new German synchros didn't
solve
> the problem. The tranny shifts fine at lower rpms, but when I goose it and
> want powershifts it grinds slightly going into third (from second and
fourth)
> and a little on the hard down shifts in second. Hard shifts are revving up
to
> 5500 rpms. The clutch was rebuilt about 10 years ago with a Borg and beck,
> and guest throw out bearing. Clutch looked fine when we inspected on
latest
> synchro change.
>
> Any ideas what this could be?
>
> Thanks,
> Jim Henningsen
> Ocala, FL
> 75 TR6
> 62 TR4
>
> Sent from my iPad
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