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Re: [Shop-talk] Thread Repair

Subject: Re: [Shop-talk] Thread Repair
From: "Peter J. Thomas" <>
Date: Thu, 27 May 2010 16:08:14 -0400
On 5/27/2010 3:33 PM, wrote:
> First make sure the thread pitch is exactly the same on both transmissions.
I have the original flange from the old transmission and a new flange 
that came with the new transmission.  Both flanges spin effortlessly on 
the old transmission the full thread length about 3 inches.  The flanges 
only have about one inch of thread.  So it's not a mismatch.
> If so then look for thread problems with the new shaft.  If you see them you 
>could even touch up the threads with a small triangular file.  If you don't 
>see anything with the new shaft then look at the threads inside of your 
>flange.  Maybe the new shaft is trying to go deeper into the threads or 
>somehow the end of the shaft is shaped differently from the old shaft.
I'm pretty sure the it's the thread mid way on the new shaft.  Both 
flanges fully thread onto the new shaft fully but stop at the same 
point.  I also tried the the flanges reversed, same thing.  One the old 
shaft they spin effortlessly the entire length of the shaft.

Looking at the threads in the aluminum flange there is a wear spot so I 
suspect the threads on the shafted were banged and bent.  Worse could be 
the shaft is bent but it does not appear to be.  The shaft in question 
is actually a tube with another inside that spins freely, so I guessing 
it's not bent.  I'm going to try the triangle file, if I can find mine.


Peter T.
>>> My washing machine's transmission died so I ordered a "new" one
>>> online, though not really sure it's new.  The transmission has a
>>> threaded steel shaft, 1-1/8x12 I think, that a threaded aluminum
>>> flange treads onto to hold the basket.  I believe the threads on the
>>> shaft are bad/damaged.  I have two of the flanges.  Both thread on
>>> the old transmission without any problem but both stop abruptly a
>>> the same spot on the shaft of the "new" transmission.  Quick
>>> inspection with the "new" transmission installed in the carcass of
>>> the washing machine I don't see anything obvious with the threads.
>>> I'm faced with a three options: send it back with a couple of weeks
>>> of turn around (and trips to a laundry mat), order a die hoping I
>>> sized it correctly, or "fix" the threads.  I would rather fix it and
>>> the correct method is to use a die but don't think I can buy one
>>> local without ordering.  Dies this size are not cheap.  The other
>>> option is to pull the transmission and file down the bad
>>> thread.  I'm pretty sure the problem is localized midway down the shaft 
>>> I figure someone on this list with a LBC has had to deal with with a
>>> hard to replace part with damaged threads.  Any suggestions/advice?
>>> Peter T.
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