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Old 08-23-2017, 06:13 AM   #1
Adam Lonergan
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Default 71 triumph 5 speed woes

This sucker has been fighting me the whole way!, I have a 71 650 five speed (also the one with the leaf spring.
I have upgraded the gearbox with the recommended upgrade kit but it seems to be struggling with third gear, when I go to shift it into 3rd the mainshaft 4th wants to slide out thus sliding out the mainshaft?
any one figured this out?
Cheers from NZ!
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Old 08-23-2017, 07:28 AM   #2
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Default Re: 71 triumph 5 speed woes

check the bush in the gear?
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Old 08-23-2017, 08:58 PM   #3
Adam Lonergan
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Default Re: 71 triumph 5 speed woes

No bush in this gear as it is on a spline, so it pushes up against the spline end and wants to keep going.
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Old 08-23-2017, 10:00 PM   #4
bobscogin
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Default Re: 71 triumph 5 speed woes

I'm assuming you've got the shift quadrant indexed correctly. It can be tricky without the tool.

Bob
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Old 08-24-2017, 04:26 AM   #5
Adam Lonergan
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Default Re: 71 triumph 5 speed woes

Haven't got the shift quadrant on yet just changing the gears by rotating the camplate, I think it might not be the right camplate for the cluster?
How many different 5 speed camplates is there? I thought the only variation was in a cutaway to allow fitting it with the high gear in place.
I will solve this if it bloody kills me!!!
cheers for the input guys!
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Old 08-24-2017, 02:17 PM   #6
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Default Re: 71 triumph 5 speed woes

...so if you rebuilt the gears right, in my opinion you would put the inner and outer covers; then do the test with only the allen head fastened then use the outer cover lever.
If after this test you do not have the 5 speeds is due to bad engaged the quadrant (if the gears, dogs and arms are correctly done)

There are 2 plates only but the spindle and other minor parts are different in later models
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Old 08-24-2017, 04:29 PM   #7
bobscogin
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Default Re: 71 triumph 5 speed woes

Quote:
Originally Posted by Adam Lonergan View Post
How many different 5 speed camplates is there? I thought the only variation was in a cutaway to allow fitting it with the high gear in place.
Right. Trident camplate has the cutaway. I initially had trouble assembling my '73 TR7RV transmission, I think I had a fork in the wrong position if I recall correctly. This video was very helpful. https://www.youtube.com/watch?v=4j5Q...h%20Enthusiast

Bob
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Old 08-25-2017, 03:26 AM   #8
Adam Lonergan
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Default Re: 71 triumph 5 speed woes

Yep, found that wasn't the problem as when I tried to change the gears with the cover off, I had the same problem
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Old 08-25-2017, 03:26 AM   #9
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Default Re: 71 triumph 5 speed woes

cheers Bob!
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Old 08-25-2017, 10:23 AM   #10
reverb
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Default Re: 71 triumph 5 speed woes

...in that clip you will not see anything different than what I mentioned.
No doubt that you have one of the stuff in the wrong position.
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Old 08-25-2017, 09:23 PM   #11
Adam Lonergan
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Default Re: 71 triumph 5 speed woes

I think I have had a bit of a eureka moment, I upgraded the fifth gear (and bearing) to the t140, I bought the gear second hand so replaced the needle bearings in it but on the one on the gearbox side there is no 'stop' for the bearing to hit so I think I have driven it in too far thus making the mainshaft which rides against the edge of the needle bearing go into the gearbox too far, explaining why the gear wants too pull it out. I will check tonight (NZ time!) and see, will keep you all posted!
fingers crossed!
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Old 08-25-2017, 10:28 PM   #12
Adam Lonergan
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Default Re: 71 triumph 5 speed woes

So next question, does anyone have any info on how far to knock the needle bearing into the 5th gear (part no 57-4780)?????
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