Well, I'm old but I'm not a wife, and I may have started this friction
fiction friction.
What I said was that if one has a car which still has it's original
transmission fluid, and if the car was built while the old Whale Oil based
fluid was in use, then don't change it unless there is some problem with it.
The old whale oil based fluid was great stuff, and made the transmissions
designed to use it work best, better than the new "equivalent" vegetable oil
based fluids made today. The changeover was made sometime in the late
50s -so the 67 would have been originally built with fluid very similar to
today's Dexron/Mercon. The modern fluid has better anti-foaming properties,
and probably resists damage from overheating better, but friction
characteristics are supposed to be the same.
I've had quite a bit of experience with old Ultramatics, rebuilding them
and servicing them as I ran a Packard service garage for about 20 years - I
always advised saving the original fluid and re-using it unless it was
burned or dirty. Transmission fluid does not wear out from use.
The only significantly different fluid around is type F fluid, used in some
Ford, Studebaker and Jaguar transmissions. This has different friction
characteristics, and was sometimes put in the cars to make them shift more
rapidly and with less slippage. This could be desirable if the transmission
is used for racing or I suppose if there is slight slippage developing, to
nurse a few more miles out if it.
Dick Benjamin
----- Original Message -----
From: "Rob P" <fristpenny@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Tuesday, July 20, 2004 8:42 AM
Subject: Re: IML: 67' Transmission Fluid & Slippage
> The story (old wive's tale?) I heard was that if your transmission fluid
had
> never been changed and you didn't have any trouble with it DON'T change
it.
> The reasoning was that the new fluid would "flush" the transmission and
> cause leaks. Sort of the way some of you advised against an engine flush
on
> a high mileage car. I never heard about it causing slippage though.
>
> Rob
>
>
>
> >From: RandalPark@xxxxxxx
> >Reply-To: mailing-list@xxxxxxxxxxxxxxxx
> >To: mailing-list@xxxxxxxxxxxxxxxx
> >Subject: Re: IML: 67' Transmission Fluid & Slippage
> >Date: Tue, 20 Jul 2004 09:56:19 -0400
> >
> >If changing the fluid ruined the tranny, it needed to be rebuilt anyway.
If
> >the wrong fluid was used, changing it to the correct fluid should take
care
> >of it, as long as it wasn't driven much.
> >
> >I am not sure how this got started, but I have never heard that changing
> >the fluid will ruin the transmission. Leaving fluid in for too long after
> >it has been hot can cause problems, but these problems should not be made
> >worse by servicing the unit.
> >
> >One of my Imperials had a bad tranny when I bought it. The car had been
> >overheated while pulling a trailer over the Grapevine. The owner drove it
> >until it quit. The engine was ruined, but was made to run. The
transmission
> >was cooked. I had the engine rebuilt, and managed to keep that old tranny
> >going for two more years by having it serviced frequently. Finally, it
> >would no longer go into reverse, or high gear. While it was sick, the
fluid
> >would turn dark every 5,000 to 10,000 miles. When that happened I would
> >change what I could without draining the torque converter.
> >
> >I'll admit that this is an extreme case, I just don't see how changing
the
> >fluid could hurt the unit. After a certain number of miles, the
> >transmission is going to wear out. It can only last for so long.
Premature
> >failure is usually due to lack of service or catastrophic events.
> >
> >Paul
> >
> >In a message dated 7/20/2004 1:17:44 AM Eastern Daylight Time, "Cliff
> >Wilhelm" <ldangel987@xxxxxxxxxxx> writes:
> >
> > >The fluid was changed about 1.5 years ago when I got the car. It didn't
> >have
> > >any problems then. This would be the second change, only because the
> >filter
> > >was changed.
> > >
> > >I'll be irritated to find out changing the fluid is going to kill my
> >tranny.
> > >
> > >.c.
> > >
> > >
> > >>From: "jsadowski" <jsadowski@xxxxxxx>
> > >>Reply-To: mailing-list@xxxxxxxxxxxxxxxx
> > >>To: <mailing-list@xxxxxxxxxxxxxxxx>
> > >>Subject: Re: IML: 67' Transmission Fluid & Slippage
> > >>Date: Mon, 19 Jul 2004 12:40:56 -0700
> > >>
> > >>You should be using Dexron or Dexron/Mercon. I would try changing it
if
> >you
> > >>suspect that wasn't what was used. If the trans was a lot of miles on
it
> >&
> > >>the fluid never changed, changing it could cause problems to start,
even
> > >>with the correct fluid. My daily driver Fxxd had 190,000 miles & I
> >wanted
> > >>to have the trans serviced. The service manager told me not to even
> >think
> > >>about it. Doing so could potentially kill it on the spot was what I
> >was
> > >>told. My sister once owned a 67 polara & a mechanic friend told her
> >pretty
> > >>much the same thing.
> > >>John
> > >> ----- Original Message -----
> > >> From: c.wilhelm
> > >> To: mailing-list@xxxxxxxxxxxxxxxx
> > >> Sent: Monday, July 19, 2004 11:24 AM
> > >> Subject: IML: 67' Transmission Fluid & Slippage
> > >>
> > >>
> > >> I just have a quick question(s).... What is the recommended
> >transmission
> > >>fluid for my 67'? (I only found notes on a '58 in the archives).
> > >>
> > >> Recently I had my transmission filter changed, and now I have noticed
> > >>some slight slippage under harder acceleration? I am assuming it's the
> > >>fluid, as I never had slip before...?
> > >>
> > >> Thanks,
> > >> .c.
> > >
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