It would appear that selector forks AND throw out bearing forks are
potential problem areas. I spent WAY too much time trying to figure out why
various TOBs (including the one I got from Brian) were screeching whenever I
pressed the clutch pedal. Turned out to be a "slightly bent" yoke! Just out
of true enough that it was pressing on the sleeve with only one of the pins.
Maybe quality control on TR "forked things" was not what it should have
been? Worth considering anyway...if your problem involves a two-pronged
device that's supposed to press on something evenly, make sure the thing is
straight!
Michael Ferguson
1959 TR3A TS53990L--->O!
----------
>From: "Power British Performance Parts, Inc." <britcars@powerbritish.com>
>To: Triumphs <triumphs@autox.team.net>
>Subject: Re: Transmission woes
>Date: Thu, Jun 22, 2000, 9:07 PM
>
>
> dncullig@us.ibm.com wrote:
>
>> Fellow LisTRs -
>> Once again, I come looking for help. The J-type OD that I had
>> installed in my
>> 76 TR6 this past May is acting up. It popped out of 3rd gear once or twice
>> 2 weeks
>> ago and I didn't think much of it. Now, however, it simply will not stay
>> in 3rd gear.
>> It pops out regularly, even when under power. It'll stay in 3rd if you
>> hold it in, but even
>> then you can feel it trying to pop out. None of the other gears seem to be
>> similarly
>> affected. I'm going to take the tranny out of the car and am planning to
>> take it back
>> to the guy who re-built it back in February, but would like to tap the
>> collective wis-
>> dom of the list first to see what might be wrong. Any ideas and/or best
>> guesses
>> are welcome. I'd hate to have to go back to my non-O/D transmission,
>> especially
>> with a rather long trip to the VTR Regionals coming up in a few weeks, but
>> I need
>> the car to be reliable. Thanks for any and all input.
>>
>> Dennis Culligan / 1976 TR6 CF57948U(O) - TR6IUMPH / Highland ,NY/
>> DNCULLIG@US.IBM.COM
>> See www.britsofthehudson.org for info about our club
>
> Dennis,
>
> Other listers have made good suggestions about what can cause popping out of
> third, but let me relate a simple story that might just save you from having
to
> disassemble the whole trans again.
>
> A few weeks ago, lister Gary Klein called me and told me of a problem with a
'6
> J box we did for him last month. His car would not go into third gear at all
> even though the shift rail moved and appeared to work properly from the
> outside. Since I run transmissions on a break in stand and I knew that it had
> spent 8 hours turning in third gear, and since Gary said that 4th gear worked
> fine, I immediately started to think that some how major damage had occurred
or
> something similar. I went down with the trailer and picked up the car fearing
> that there had been a major failure. When we got the top cover off, nothing
> appeared wrong on the inside. Selecting third and easing the car around the
> lot with the cover off revealed that 3rd was fine. The problem ended up being
> in the selector fork itself. Turns out it was slightly bent such that the
> fingers weren't perfectly parallel to the rail, but slightly tilted forward.
> Barely noticeable when looking at the assembled top cover. This was just
> enough to keep the hub from engaging fully in third, but still allowed it to
> operate OK in 4th. We concluded that on the break-in stand with no load on
the
> trans that there was so little force that it held in gear just on the edges of
> the teeth, but once the force of turning the rest of the drivetrain was on it,
> it would immediately pop right out as soon as you'd try to let up the clutch.
> While this is somewhat different than the problem you're experiencing, it's a
> good lesson in not overlooking the obvious details and hopefully sharing the
> experience will help keep someone else from making the same mistake.
>
> Good luck!
>
> Brian Schlorff
> Power British
> http://www.powerbritish.com/~britcars
>
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