Packard Forum Index » V-8 (1955-56)

To add to Owen_Dyneto's excellent post: when you hammer out the distortions to the mating surface of the pan, don't use the hammer as though you are trying to pound nails onto wood--use the hammer in an oval pattern of blows so that the hammer contacts the work as it reaches the bottom of the "O" oval and continues upward to continue this oval pattern. Why? because the type of hammer blows that one uses to pound in nails will displace the metal, making the area you are hammering thinner.

Let the gasket do what the gasket is designed to do, don't rely on tubes O'goo to make up for previous sins.

Obviously you arnt going to put Ten tons of the stuff(RTV) on the gasket but that cork gasket will not get much squeze on it.Straight surfaces or not.ANY over torque on it and you are done start over.Make or buy a new gasket.(tough out of cork.)Dont get me wrong i am no fan of RVT,However when I have a expert tell me it is ok, and other experts say no. this gets confusing.It is specifyed 48 hour cure time.If any of the cork gets in there it wont do much good either.

Hi Bowman:

Given you have no obvious problems I would leave things alone except that the Packard manual does recommend periodic fluid changes - 25000 miles.

Next question is - who knows what is in your transmission anyway.

Dexron contains friction modifiers that are of no benefit to Ultramatic. Type F will perform differently that Dexron in identical hyraulic systems from an engineering standpoint. Again this should not affect Ultramatic.

Thus Type F is closer to Packard Specs that Dexron.

Now there are Type A fluids out there that contain no friction modifiers and do not have the hydrodynamic properties of Type F. However they are usually oils sold for the second tier aftermarket. I presume they are probably just 10 weight motor oil with a dye in it.
10 weight motor oil may be perfectly okay for Ultramatic given no extreme or winter usage.

However, type F seems the best pick for Ultramatic.

Lubriplate made type A, they have gone to the dexron/mercon, which is supposed to be for type A transmissions, have not looked to see if has friction mods, but they also make tpye F,, i have also used trick shift, not cheap,,but firm shifts.. since it is for racing,

What about jack oil?,,i would not use it, but would it work?

rik

Brian51,

Your post reminds me of Mark Lambert talking in one of his restoration shows (maybe the 1938 Eight project) about using silicon sealer on gaskets. He recommended placing the sealer on the gasket (either on one side or both sides depending on need), then rubbing the sealer around with your fingers, leaving only a minimum amount on the gasket. This will prevent excess sealer from squeezing out when the gasket is tightened down and getting into the internals. Seemed like good advice to me, and I have followed his guidance when using sealers on gaskets.

(o[]o)