Power Booster Question- Dual Diaphram

[avejoe]

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!

[JimKshortstep4x4]

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

[1-PU70]

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.