Re: Bendix Treadle Vac Study- Serioius Business!!

Posted by HH56 On 2010/12/13 16:28:08

Packard has nothing specifically saying to replace the fluid in the OM or SM. Only to check level every 1000 miles and clean or change the power brake air filter at 10,000.

It has been suggested by several that changing every couple of years probably wouldn't be a bad idea for cars that sit long periods or don't get driven much. The DOT 3 & 4 fluid tends to attract moisture and without the benefit of getting hot regularly to "boil" it out, could deteriorate fairly rapidly. Did you have any solid chucks floating around in yours when it was changed?