It is policy at National Chains of Oil Change shops to refuse to change
fluid in old transmissions (100k or more)  unless you produce a receipt
for prior service within 25K or a receipt for a transmission rebuild job.
New fluid removes all that dirt that keeps things sealed in old
transmissions and the most common leak is at the torque converter, shift
linkage and output shaft.
If you ever rebuild an automatic transmission.......... always replace
the engine crank seal.

Stan Wilder

On Thu, 27 Dec 2001 16:46:41 -0500 Kitzmann <kitzmann@EXIS.NET> writes:
> > Recently I had a friend tell
> >me that on an old engine, it's not a good idea to run them because
> they
> >cause quicker wear to the older parts.  Is this true?
> >
> Thats about as good as the mechanic that told my wife that you
> shouldn't
> change Auto trans fluid because her transmission had gotten used to
> the
> dirty fluid????
> Dave K.
>
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