Another quick update - got all of the detent balls / springs / etc. out,
that's not where the problem lies. It must be in the interlock
mechanism, that's all that's left in the cover to interfere with
movement. From the exploded diagram, that interlock looks dead simple,
I'm unclear how it could mess me up.
I'm waiting on some 8 point sockets to arrive to get it fully apart, I
won't know more until a few days from now.
I've got a TR-3 cover that I can cannibalize some of the screw thread
plugs (for the detents) from, although the plugs would probably still
work but I had to drill holes in them to remove them of course. If they
are supposed to be oil tight, the old plugs won't be anymore.
- Tony
On 8/17/2024 5:37 PM, Tony Drews via Fot wrote:
> Just a quick update. Not fixed yet, but the problem IS in the top
> cover (thank goodness). I can shirt it into 3rd easily with the cover
> off, and on the workbench the 3/4 rail will only let me move to 4th
> position, not 3rd position. The covers over the detent spring are not
> the screw type, so will be a PITA to take apart I suspect.
>
> Thanks for all the tips, and thanks Henry for pointing me to the
> Buckeye Triumphs gearbox stuff. I'll be digging into that next trying
> to figure out how to take it apart. I did take out the overdrive
> switches, they were not the hangup.
>
> Cheers, Tony
>
> On 8/15/2024 6:44 PM, Tony Drews via Fot wrote:
>> At my last race, I felt entry to 3rd gear have some resistance, then
>> the resistance went away, but near the end of the weekend something
>> happened that prevents me from shifting into 3rd gear. I can shift
>> into all of the other gears just fine. Didn't feel like a internal
>> gearbox issue (I certainly hope not, I just replaced all the quaiffe
>> goodies in there). I've never taken the top cover apart / had to fix
>> that. It does still have the overdrive switches in the top of it
>> even though I'm no longer running the OD.
>>
>> So... I'm planning to remove the tranny top cover this weekend and
>> see what's going on. I probably have a spare from an unknown
>> quantity transmission from my Dad's stash, but I'd like to fix the
>> existing one if possible. For those who have done it, how fiddly of
>> a job is it to take that stuff apart? Any ideas what would keep it
>> from shifting to 3rd? I have noticed increased resistance on the 3/4
>> shift rail since my rebuild earlier this year (but didn't have time
>> to look into it at the time).
>>
>> Looking for words of wisdom from those who have been there / done that.
>>
>> In other news I have some pretty epic videos from last weekend's race
>> at Grattan coming. Here's a appetizer from the "Genius Garage
>> Invitational": https://www.youtube.com/watch?v=_LWlZIFA_gg
>>
>> All the best, Tony Drews
>>
>>
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