It's best to rebuild or replace brake cylinders in pairs anyway but be sure that whatever you do, you use the size specified.

Casting date of January 14, 1937 is confirmed. Now, based on how quickly Ken’s car was turned around, it appears that cars rolled off the assembly line less than a week after the casting date (at least in one case).

If that’s the case, my estimated manufacture date of January 18, 1937 looks like a pretty decent estimate.

In any case, I think I can say with confidence that my car was built in the last half of January, 1937.

Yes but there is a proportion of master cylinder volume and wheel cylinder effective area that needs to be maintained so that the master cylinder has enough fluid to extend the wheel cylinders, yet they can back off sufficiently when the brake is released.

Though, since the brake springs pull the cylinders "in" when brake pressure is off, I don't think you could easily get past the baseline "off" position in the wheels, so there would never really be enough fluid in the master to extend them all.

G'day Steph,
to PackardInfo.
And for including your '49 Club Coupe in PackardInfo's Packard Vehicle Registry.

Thanks Bob and William. I bought the replacement cylinder at Napa ($20) because it was close and I thought I'd just be replacing the one leaking cylinder. Once I compared the two I realized they were quite different. So I went ahead and bought replacements for the other 3 on RockAuto. I know for sure the other rear is too big. I'll need to check the fronts and see, but I may just replace all of them anyways.

Larger cylinders will exert more force, correct? Makes sense that the pedal travel would be more.

I don’t recall how my ‘40s is put together but I did take apart the one on m y 1951 as no amount of soaking would get the rocks out of it that the old oil had turned into.

The oil pickup float can be removed, but the screen is part of the float.

You just have to soak it to clean it.

Doing a search at Amazon for stainless steel threaded balls brings up several offerings in various sizes but since a lot if not most of the items are foreign manufacture the threads are mostly metric. Possibly some would be a close enough fit to work but it might be a tough job finding an exact match to whatever US thread is on the antenna.

1937 was Packard's highest volume year. They were turning and burning them for sure!

I wonder how many shifts the factory was running at that point.

Looking for screw on tops for radio antenna.I have installed the larger black plastic ones on my rear antenna as a safety move as the antenna are at eye level always worry about someone looking down and hitting eye with small ball. Easy to put small ones bacu k on the

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