First off i just want to say HI. I am new here.. i have a 87 iroc 350 TPI, A4 .. the rearend went out the other day ... all kinds for whining and popping... i got a disk brake rearend off of a 88 iroc it is a manual 305... what will i need to get off of the 88 to make it work on my 87 (master cylinder, ebrake cable)?.. also i heard that there was a recall on the ebrake cable on the disk.. pre 89.. should i go and buy a new cable??? thanks in advance

mike

 

ull need the proportioning valve,e-brake cables. it may be easier just to unbolt the brake booster and take that,master cylinder,and prop. valve out as a whole. 4 bolts hold it on,and then undo the couple brakes lines on the prop. valve.

hope this helps

 

Although the proper master cylinder/proportioning valve for the disc rear is recommended, it is not necessary. Several people have done the drum/disc swap and reused the existing drum brake MC/prop valve with no problems - me included.

The E-brake issue you are referring to is for the rear calipers, not the cables. If the caliper piston sticks after applying the e-brake, replace the calipers.

 

I thought 4 wheel disc were standard for IROCs??

 

No.

 

thanks a bunch... do you think that i will need or recommended that i get the master cylinder/ brake buster just to be safe?.. also with the calipers do you think that i should get a recall kit for them to be safe?... and again thanks a bunch


mike

 

recall? what?? explain.

 

Like I said, the master cylinder and proportioning valve are recommended, but not necessary. With the wrong combo the worst that could happen is a lack of rear brake pressure. My advice would be good ahead and do the swap. Then determine whether or not you want to switch everything over. My car like many others operates fine without the recommended MC and prop valve.

You can leave the power brake booster alone. They are the same.

Those older 85-88 iron calipers are known for that problem. The 89 and later PBR calipers are the way to go. They were used on all rear disc setups from 1989 to 1997. I've never rebuilt or replaced a set of rear 85-88 calipers so I can't help much more

 

If you use the 88 calipers than get the upgrade/rebuild kit. My 84 brakes got to the point where the rears would not work at all.

 

I just put a disc brake rear in my car today that had drums before. The only thing that was different is the brake lines and the e-brake cables. I used the old prop valve without any problems.