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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 2010 Posts: 62 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2010 Posts: 62 | Replaced master cylinder on 1948 1/2 ton ,original cylinder, what kind
Of fluid should I use,how many dots fluid should l use, dos it matter?thanks | | | | | Joined: Jan 2016 Posts: 1,101 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 1,101 | I recently rebuilt my master cylinder on a 54 1/2 ton. I didn't think to ask this question. I just put the basic Dot 3 in it. That was about 2 months ago. So far so good. Fingers crossed and hope Dot 3 is the right answer. | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | DOT 3 is the same as the OEM fill. DOT 4 and DOT 5.1 will also work fine, the primary difference being the boiling point. You will want to stay away from DOT 5, which is a silicone based fluid that is not compatible with the DOT 3/4/5.1 glycol based.
Bill Burmeister
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