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#1 |
Custer had a plan too.
Join Date: Dec 2003
Location: No. California
Posts: 344
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Power Booster Question- Dual Diaphram
Anybody replaced a single diaphram booster on a half ton with a dual diaphram booster? If yes, what was involved? Did the brakes work better?
Can power boosters go bad slowly, or do they just stop working? I have had a really tough time getting my brakes to panic stop. I just had the system checked and there is good pressure to all the wheel cylinders. The brake guy (well recommended) seems to think it's the power booster and recommends a dual diaphram booster. My booster checks out ok by me as it sinks a little when I turn the truck over and with the motor off it seems to hold pressure. Thanks!
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72 K15 GMC (aka Big White) Performance Rockers, Cab Corners, and Floors Fossil Fuel Glutton Neighborhood Nuisance 98 BMW 540i for Speed (Sold ![]() 05 Subaru Outback for mileage |
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#2 |
Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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It sounds like your present diaphram is working ok from the way you checked it out. Given the weight of the 4x4's I have always thought the dual diaphram
brake booster would be a good upgrade. We have used the dual booster on a two wheel drive and it does make stopping easier. It should not present too many problems to swap out the booster. They are a little thicker which moves the master cylinder forward and the master cylinder may have to be replaced with the 3/4 ton master cylinder. If your present master cylinder won't fit then the brake lines will have to be re worked when the new one is installed. WE used an existing 3/4 ton setup with the brake lines etc. There may be a dual diaphram available that will use your existing lines and master cylinder. Jim |
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#3 |
Registered User
![]() Join Date: Apr 2000
Location: Bradenton, FL
Posts: 1,036
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On my 70 C10 (witch is converted to dics up front)when I replaced the single with a duel It did stop better. I had to replace the the master to a 77 1/2 ton because the lenth of the rod exiting the power booster. works fine.
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1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters |
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