Commando Transmission case wanted with the neutral switch boss.

TWS

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Time Warp

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What is wrong with that one, crack between the bearing bores ?
 
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That's repairable by a good alloy welder, its just a crack from someone being too hamfisted with the hammer seating the sleeve gear bearing. The problem crack is between that bearing and the smaller one below.
 

TWS

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That's repairable by a good alloy welder, its just a crack from someone being too hamfisted with the hammer seating the sleeve gear bearing. The problem crack is between that bearing and the smaller one below.
Anybody you could/would recommend. I would like to use some one reputable that can get it done right the first time. which i know is not supper easy as these casting are lets say not very uniform. I also fear distortion, aso a change in the temper of the surrounding area and its long term durability. however at this point I don't have a lot of options.
 
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I am in UK so no one I would recommend would be of any use to you. If no one from US gives a recommendation then go to your local go faster car/motorcycle guys and ask them for recommendations. My local welder prefers welding brit castings over Japanese castings as they are much cleaner.
 

Time Warp

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You would have to wonder (if clean from contamination) if it could be laser welded.




#
From my observations, the sporadic cracking between the bearing bores might be due to a interference fit variation on the larger sleeve bearing.
Being a larger circumference/interference it overcomes the smaller bore if slightly high and cracks having next to no wall thickness.
It is fairly easy to detect when fitting the bearings on non cracked cases.

Nothing a little #290 doesn't bodge fix.
 

Fast Eddie

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I would have thought that the hardest part of repairing that would be properly removing all the goop in order to allow a good clean weld?
 

Time Warp

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If you poor a ton of heat/weld into it the risk is shrinking the lower part of the bearing bore (besides distortion)
That in turn might stress the already paper thin wall between the two bearings. ( and perhaps why Triumph used a bush then needle roller with a similar gear shaft spacing/gear diameter)

Perhaps why laser welding might avoid that to whatever unknown degree oil sealing the case only and restoring the base stop bottom of the bearing bore.
Based on the picture it might not need a full 360 degree repair.
 
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