chipskittles
I'm Awesome
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- Mar 20, 2013
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The quick take up master was used on the JB5 and JB6 brakes with the 75mm dia piston calipers (low drag). The master for the JD6,JB7,JD7,jd8 are all the same Vacuum or Hydroboost and should work fine with the 80mm 3/4 ton caliper those calipers should be convention calipers i think the JD6 system used the low drag 75mm calipers . The whole low drag calipers and quick take up master has been used on chevy stuff since the early 80's my 83 caprice wagon had it but the brakes were very good and would throw you thru the wind shield if you looked at the pedal the wrong way not sure why it didn't work out on these trucks.
Many attribute the poor braking to the poor rear wheel anti-lock(RWAL) system that was used up until about 95 or so when they went to all-wheel ABS. There's more to it of course but I will say from personal experience that RWAL system does not age well and removing the system can make a world of difference to pedal feel/real world braking performance.