John,
Had the exact same problem with a rebuilt unit. My problem was the 3/4
gear selector fork's prongs were bent, ever so slightly (They're bent
towards the front of the car, as the fork mechanism is jamed backwards
upon selecting 3rd, thus prohibiting full engagement of 3rd.). Just
take the top cover off and inspect the fork again, perhaps coercing them
back a bit.
I don't think, but am not 100% certain, that the detent, balls and
springs are what keep the gears meshing and I agree with your synopsis
that it should happen in 4th as well, if these items did just that.
Good luck. Hope this helps,
Gary Klein
Digest '75 TR6
Severn, MD
President, TRiumphs Around the Chesapeake, TRAC
> Date: Sun, 22 Jul 2001 20:14:04 EDT
> From: JRossi727@aol.com
> Subject: Transmission Help Needed on TR-6
>
> Hello All. Having trouble with third gear in a TR-6. Have rebuild
this
> transmission. Replaced all scyros, bearings, thrust washers,
first/second
> scyro hub, third and fourth scyro hub, and third gear. And set gap.
Tranny
> has been apart two times now. And stills jumps out of third gear. On
heavy
> deceleration. Second time apart I replace the third gear. I am going
to try
> replacing shifter top. Forks looked OK. Maybe spring and balls. But
that
> would effect fourth gear? If bad. Any help out there? Thanks John
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