Re: are automatic trans parts balance critical?

["62-65-mail-list-club-Gary-H" <62-65-mail-list-club@xxxxxxxxxxx>]

Thanks for the update Neal. Cope is on the vendor's page list and I had forgotten they had Ytube how-tos. 

Are we going to see a Neal's "How I Rebuilt My 727 TorqueFlite Transmission" video on Ytube? :)

Thanks,
Gary H. 

>  -------Original Message-------
 
>  
>  according to what i have dug up the only critical balance issue is
>  with the torque convertor. The rotating pieces in the transmission are
>  given a spin balance at the factory, but they dont have any other
>  function other than that. It is okay to mix and match pieces as long
>  as they work. But there are several rules you cant break as the TF had
>  a few changes through the years, probably the best known one being the
>  1971 change to a wider stator support surface, and corresponding front
>  drum. Having a good time rebuilding this thing, learning a lot. All
>  the videos at John Cope Racing transmissions have been a big aid as
>  well as the old factory films. I just hope it works when I fire it up!
>  Neal Zimmerman
>  
>  On Sat, Apr 26, 2025 at 7:58 AM 62-65-mail-list-club-Gary-H
>  <  > wrote:
>  
>  > It sounds as if you are assuming the holes drilled in the rear drums
>  > are for balance? That seems logical but I don't know. There may be
>  > a
>  > 727 parts interchange reference book?
>  >
>  > Michael L. is still (I hope!) a member of this mail list and sees
>  > your
>  > message. He used to run a Mopar transmission rebuilding company.
>  >
>  > Thanks,
>  > Gary H.
>  >
>  >> -------Original Message-------
>  >> Im putting together a 1974 727TF that came from a 1974 dodge
>  > truck
>  >> with a 440. So yes by 1974, that 440 was most surely a cast
>  > crank
>  >> external balance motor. But, of course , several parts are bad
>  > and
>  > I
>  >> have two other BB trannies to pull parts from to create a
>  >> frankenstein, a 1967 and a 1969, both of which were most likely
>  > steel
>  >> crank/internally balanced motors. For instance the rear drum is
>  >> toasted but I have a real nice rear drum from the 1969
>  > transmission
>  > I
>  >> want to stick in there. But the 74 drum has 5 holes drilled all
>  > the
>  >> way through it and the 69 drum has three holes partially drilled
>  > into
>  >> it, but not through. Is this an issue??
>  >> Thanks all.
>  >> Neal ZImmerman, Eugene Oregon
 

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