| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
01-30-2001, 03:32 PM
|
|||
|
|||
hi all. i recenly purchased a 72 ho trans am and am wondering for saftey purposes if i can install late 70's ta disk brakes on it with out any major modifications?
__________________
1972 HO Trans Am auto White/white 1974 SD Trans Am 4 spd, no a/c dk blue/ white & blue 1978 Trans am gold/ black ,T56, t tops, EFI 474, Build: http://www.pro-touring.com/showthrea...1978+g+machine 1999 30th Trans Am 6 spd, T top |
|
#2
01-30-2001, 03:32 PM
|
|||
|
|||
|
hi all. i recenly purchased a 72 ho trans am and am wondering for saftey purposes if i can install late 70's ta disk brakes on it with out any major modifications?
__________________
1972 HO Trans Am auto White/white 1974 SD Trans Am 4 spd, no a/c dk blue/ white & blue 1978 Trans am gold/ black ,T56, t tops, EFI 474, Build: http://www.pro-touring.com/showthrea...1978+g+machine 1999 30th Trans Am 6 spd, T top |
|
#3
01-30-2001, 07:00 PM
|
|||
|
|||
|
the rear end is a bolt-in. i don't know if just the brackets will swap over. you'll need the master cyl from the disc car, the proportioning valve, and the parking brake cables. the cables are how the rear calipers adjust [when p-brake is applied]so be sure to change them also. mike
__________________
so many pontiacs, so little time.................. moderator is a glorified word for an unappreciated prick.................. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." --Albert Einstein "There is no such thing as a good tax." "We contend that for a nation to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." - Winston Churchill |
|
#4
01-31-2001, 09:35 AM
|
|||
|
|||
|
the rear end is a bolt in. i don't know if just the caliper brackets will interchange to your diff or not. you'll need the master cyl,proportioning valve,and the e-brake cables.[ the calpers adj out when the e-brake is set]. mike
__________________
so many pontiacs, so little time.................. moderator is a glorified word for an unappreciated prick.................. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." --Albert Einstein "There is no such thing as a good tax." "We contend that for a nation to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." - Winston Churchill |
|
#5
02-03-2001, 10:06 AM
|
|||
|
|||
|
The '79-81 T/A rear caliper brackets are a bolt on for most GM C-clip type rearends. The other problems, I can forsee is the '71-74 Firebird drum axle is some how different than the '75-81 drum axle (they appear the same length) & the '79-81 disc brake axle has a deeper locating flange which guides the rotor on.
Other problem is you really need the '79-80 4wheel discbrake booster & master cylinder. Many early T/A guys don't like the appearance of the short squatty 4 wheel disc booster on their restored cars. Last problem... if you have the polycast honeycombs, the inner part of the wheels will not clear the rear calipers. We have solved this in the past by carefully radius grinding the calipers, then performance coating the calipers before rebuilding them. I believe the stock KR Rally II's will clear with the aid of 1/4" thick wheel spacers. I am interested in this swap on my own '72 T/A. Will mockup an early (71-74) Firebird rearend with disc parts during my next diff build session & check out the axle/rotor fit issue.
__________________
Buzzards gotta eat... same as worms. |
|
#6
02-03-2001, 11:59 AM
|
|||
|
|||
|
oph, can you change the master cyl and actuating pin and not have to swap the whole booster ? or does the drum booster give "too much" assist? mike
__________________
so many pontiacs, so little time.................. moderator is a glorified word for an unappreciated prick.................. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." --Albert Einstein "There is no such thing as a good tax." "We contend that for a nation to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." - Winston Churchill |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
