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TR2/3/3A Transmission disassembly

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TomMull

TomMull

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I posted this on another forum with no replies so am trying again here, and hopefully a little more concise. I am disassembling a spare transmission that's been in storage for 50 years. Top gears were pretty dry but after oiling everything seemed to work except that the transmission would lock occasionally so I assume that when I tried to get the speedometer gear assembly out the transmission was locked. The driven gear and bearing were stuck also so I put an old cable nut on the bearing and turned the assembly clockwise to free it. That did the trick but apparently destroyed the driven gear. When removed the driven gear it spun normally in the bearing, was oily and no sign of being seized. I don't see why that should have destroyed the gear even if the transmission had been stuck when I turned the driven gear bearing.

When I removed the tail housing I also found a piece of cir-clip which might account for the locking, if I didn't break it removing the housing. I used a bearing splitter and puller as suggested by Buckeye Triumphs and fairly little force.

Any thoughts appreciated.

Tom
 
It sounds like the driven gear may have been bad before you got to it. If it seized during operation the hardened worm will chew it up. I have found many parts of clips in such in rebuilds. The clip very well may have been left over from a previous rebuild too, and nothing you did. The gears are precise enough they will normally shear clips and other small parts. It's not good for the gears, but they frequently hold up well!
 
Thanks, John. I guess from that that you do not see anything that I did wrong, which was my concern.
As for the rest, anything is possible but I do have some history. I bought transmission when I broke the ring and pinion in my TR3 more than 50 years ago. I found a guy that had a rear end from a wreck that he'd sell for $25 or I could have the whole wreck for $50 delivered. The wreck was relatively new then and had only a few thousand miles but rolled and bent. I bought it and took out the drive train and anything else that would come off easily then had the rest hauled away. I still have a few pieces in addition to the transmission. I mention all this because it seems rather unlikely that the transmission was previously rebuilt but damage from the wreck is certainly likely.
Tom
 
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