Difference between disk and drum brake boosters

[Tilar]

Are they the same between Disk and drum brakes for a 68? I know the master cylinder is different but what about the booster?

[John_Kunkel]

There is a difference, power drums used a single-diaphragm booster, either Bendix or Midland-Ross; power discs used a dual-diaphragm Bendix.

[Dino]

I'm going to mount a raybestos disc brake master to my drum booster this summer when I install the front disc kit.  If it doesn't feel right I'll get a disc booster but figured it couldn't hurt to try.

[Tilar]

There is a difference, power drums used a single-diaphragm booster, either Bendix or Midland-Ross; power discs used a dual-diaphragm Bendix.

There was a booster for drum brakes on ebay last week and I almost pulled the trigger, but I want to put disk brakes on mine. After seeing your reply I'm glad I didn't.

Thanks all.

[daves68]

I think I may possibly have installed a double diaphragm booster on my 4 wheel drum system. What happens is that there is hardly any braking, then when the pedal is pushed a little harder, everything locks up. Suggestions??

[DAY CLONA]

I think I may possibly have installed a double diaphragm booster on my 4 wheel drum system. What happens is that there is hardly any braking, then when the pedal is pushed a little harder, everything locks up. Suggestions??

I've pulled dual diaphram boosters off of 69-70 B body wagon with drums on all 4's.......the dual diaphram will give you awesome assist on the pedal, you may have your shoes adjusted to far out, back them off a few turns on the adjusters, to slightly increas pedal travel

[daves68]

Thanks, I'll try that.