CT6822 - A new vacuum diaphragm for the Chevrolet Powerglide cast iron transmission for the years 1950 1951 1952 1953 & 1954. May also be known as a vacuum modulator. A difficult to find item. A defective vacuum diaphragm will allow transmission fluid to enter the intake manifold of your engine, resulting in smoke from the tail pipe. You do not want this to happen. So buy now to keep on the shelf!
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Mine had gone bad in my 1953 Bel Air, this is working great so far. 5 stars