Re: [BaadAssGremlins] Disk brake swap on 1972 Gremlin.which isbetter

[AMC74HORNET@xxxxxxxxx]

Here's a subject I am familiar with as my orange 74 Hornet has the stock
factory power Kelsey Hayes disc brakes (same as my son's 72 Javelin) and
my yellow 74 Hornet has non power Bendix disc brakes from a 79 Concord
using the 74 power drum master and booster. I had no problem getting
parts for either cars set up from the local auto parts store last june.
That includes the correct rubber hoses also. If you have a power drum
brake master and booster just remove the residual check valve in the
masters outlet port to the front brakes. A power disc brake master will
not bolt up to a power drum booster. The early Kelsey Hayes brakes has a
big combo valve on the pass side fender well below the hood hinge. The
later Bendix does not have one. On the 79 Bendix installation I added a
Wilwood adjustable proportioning valve in the line for the rear brakes
and set it in the middle of the adjustment range and never had to touch
it. I was told by Frank Swygert from AIM that it was not needed but I
installed one any way just in case. It appears Frank  was right. The
difference between a disc brake booster and a drum brake booster is he
the disc booster has a double diaphragm and the drum booster is a single
diaphragm. Since I have one car with each system I can tell you the
differences in brake pedal feel and stopping power. They both stop the
same. The difference is the car with the drum brake booster needs a bit
more pressure applied to the brake pedal to make it stop, but not much.
Also on the master cyl's the disc brake master has a larger reservoir
for the disc brake side as the pads wear the fluid makes up the distance
in the caliper. This larger reservoir I was told was made to make the
brakes idiot proof as you could probably go 1 year without checking the
fluid. I was told to check the fluid every 6 months on the drum master
with the disc brake conversion. Each swap should be just a simple bolt
in. I think this covers about everything.
"Doc"



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--- Begin Message ---

• From: Joe <jgray_55@xxxxxxxxx>
• Date: Wed, 12 Jan 2005 10:01:23 -0800 (PST)

Hello. I want/need to swap disk brakes onto my 72
Gremlin.It currently has worn/warped front drums
setup. I may have access to a 79-? Concorde set, also
a 1973 Javelin set. The Javelins are the pin/bolt thru
type caliper...not the slide type. Will they both swap
on easily? Which would be better? Our 74 AMX has the
pin type...they work very well. What all would need
changed along with master
cylinder,spindles,rotors..etc... Are parts for either
kind harder to locate? Both will need new
rotors,calipers most likely. Javelin definatley needs
new tin dust shields..they are BENT-UP. Anyone have a
good disk set-up set cheap? Thanks alot, joe


           
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