Gearbox/clutch drama

Mister Davidson was swedish
 

"Give her the greasy sleeve"
 


So we are all on the same page here. This leads me back to only reasonable explanation for the failure of the circlip being forced out by 3rd gear.

The only way that could happen is through the 4th gear selector fork HAMMERING the dogs together and translating all the pressure through 4th gear and onto the 3rd gear sprocket and then onto the clip. Now I need to know what force it would take to push a circlip out versus what kind of force could be exerted through the shifter to the selector rod to the selector drum to the selector forks and then onto the dog gear....any one here a physicist/ engineer???
 
Wouldn't it be wonderful to have access to the three engineers (only my guess) who were the principal designers and ask them ? They had to have had some rule of thumb they went by. Everything in life is a tradeoff. Still, I would expect the selection of a circlip for that application took into account the expected forces with significant margin.
 
Paul I want to have faith in them..but bear in mind they are likely the same engineers who thought a 4 window/dog set up was sufficient for second gear...turns out it needed to be 6! How many rocketeers had to learn that lesson for Triumph? Then think ignition switch, detent springs etc

My underlying concern is that I'm missing something here and what looks like the cause isn't really the cause and I may well go about reconstructing my transmission without actually fixing the problem
 
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Amen sir. You have a big fan club, and bigger congregation wishing you success.

Sadly, with that, and a dollar, one can purchase a cup of coffee.
 
Unless the damaged area where the splines dug in is the only part of the cir-clip that was actually seated in the groove. This would reduce the so called miss shift thrust transfered thru the 4th and 3rd and splined bushings to work the circlip out. Just a thought. Oh and it didn't hurt either
 
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Lol...you must have had the right amount of coffee...I guess I'll just have to distill all the info that's been contributed here and fire off my email to triumph.

Also, I imagined Fred to have had a lot more hair as a youngster
 
jmo
if that clip was correctly installed i would think that u could jump on the shifter and something else would break before the clip would come out. i would venture to say that u could put it in a press and still have a hard time getting the clip to pop out of the grove.
herman