[TR] Calling anyone with transmission rebuilding experience - 2nd attempt, part2

[Paul Tegler]

In prep for stacking gears on the main shaft, you need to pre-install 
the bushes to determine the required thickness of the circlip You se the 
clearance by selecting the right thickness washer.  As stated all too 
often you need to RTFM.   improper assy will be short lived. You'll be 
pulling the tranny again MUCH sooner than expected as 2nd gear CRUNCH 
will not be avoidable when the clip goes out again. You even need to pay 
attention to which side of the clip faces the splines. The SQUARE edge 
needs to face the spline lips.
The rounded one leads to exactly what has destroyed your shaft as pictured

ptegler


On 3/19/2023 7:52 PM, aribert neumann wrote:
> Next question - my (new) replacement main shaft is oversize in a 
> couple of places.  The diameter under the 2nd & 3rd gear bushings (I 
> have opened up the bushings to only have a light interference fit).  
> Worst is the diameter under the rear bearing.  I can install the 
> bearing but I have to hammer it ***hard*** to get it to fit on the 
> shaft - can't be good for the bearing - guessing I might change the 
> inner race diameter a miniscule amount.  I'm thinking of sending this 
> main shaft back to Spitbits and reusing my old main shaft.  I have 
> cleaned up the groove for the split collars on my lathe.  The other 
> damage on the shaft is on the nose where the cage bearing rides in the 
> input shaft - this damage is only on one side of the shaft and only on 
> half of the bearing surface (fore/aft).  I am already going to replace 
> the cage bearing with a bearing bronze bushing since the surface 
> inside the input shaft pocket is showing wear also.  The max amount of 
> surface missing on the nose of the old main shaft is 0.003 in 
> diameter.   Images:  exploded view from Bentley  manual, nose of the 
> old, worn mainshaft
>
> Your thoughts and suggestions please - off in digest mode awaiting 
> your responses.  Trying to formulate a new plan of attack for Monday 
> morning.
>
>
>
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-- 
Paul Tegler
ptegler at verizon.net   www.teglerizer.com
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