I did send the TV to a rebuilder. He heard my past history with silicon and said there would be no issues with using silicon after the rebuild. He sated that he recommends silicon fluid. I did replace the brake switch over 25 years ago as the silicon fluid was messing up the switch and I got tired of replacing it. For the last 25 years I have had a micro switch mounted on the brake pedal. Since it has never given a problem I actually forgot about it. I believe i put it on the car before suppliers were making "kits" to do the same.

I did call Kanter and talked with one of their Packard reps. He talked with their rebuilder and the rebuilder said they used to recommend silicon fluid but now they do not indicating it swells the seals.

Thanks for the info on White Post, I used them years ago for another Packard and was disappointed in their work, so for me they were not in the running this time.

Thanks for the responses I will give Kanter a call

I have pulled out my Treadle Vac after 30 plus years that I have owned the car and never touched it. It has not given any problems in all that time. When I rebuilt the brake system in the late 80s I put new wheel cylinders and brake lines in and flushed the Treadle Vac. I then put in silicon brake fluid. One Treadle Vac rebuilder I talked with tells me I can't use silicon fluid in the new rebuild, he says the silicon fluid (dot 5) has changed and will swell and degrade the seals in the unit, has anyone experienced this. I have had no problems with the brakes on the Packard in all the years I have owed it and would like to continue to use silicon fluid in it.

I have pulled my Treadle Vac out for rebuild. Advertised in PAC is TreadleVacRepair.com also know as Tiger Treadle Vac Repair, has anyone used them?
Are they any good?