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Mod | | | Forums66 Topics128,196 Posts1,057,393 Members48,471 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Dec 2007 Posts: 171 Shop Shark | | Shop Shark Joined: Dec 2007 Posts: 171 | Ok, I have scrounged several times to see if I can find that master cylinder number in previous postings but I have not had any good luck. Would someone share the correct P/N for the 1946 Chev-GMC 1.5 ton master cylinder. Also looking for a source to have my hydrovac rebuilt. I have come back to the idea that my brakes will stay as original as I can keep them. Any help or encouragement is appreciated. | | | | | Joined: Mar 2004 Posts: 6,236 'Bolter | | 'Bolter Joined: Mar 2004 Posts: 6,236 | My Chevrolet Parts Book says; 4.650 Hydraulic Brake Main Cylinder Assembly 1938-46 All COMM. and UTIL. (exc. 1/2 ton)...(1-1/4" dia, cyl casting number 5450259)(has 11/32" thd'd hole thru cyl wall)...p/n 5450629 Hope this helps, Mike B  | | | | | Joined: Nov 2005 Posts: 6,101 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,101 | Hy Big Al's, just to follow up on Mikes info, if you are looking for a part number you can order, the original part number crosses to Napa's p/n NMC M4355, reserve online price $165.60, but currently out of stock. RockAuto has Raybestos p/n MC4355 $115.89, hope that helps. | | |
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