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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