already looked through many old threads possibly found some answers but still unsure. i have a 91 camaro rs that had an open rear and i swaped in one that was posi out of an 87 iroc i belive (possibly 89) the mechanics that did the swap seemed kinda shady so dont know where the problem lies. i bought two after market loaded calipers from car quest and a prop. valve for the 87 iroc w/ rear discs and had that changed. still the peadle feels spungy and not very good at braking.. could this be due to the master cylinder although i read other wise in past threads. but when i searched part numbers they r diff. for drum and disc rears. also the mechanic said it was cause the ebrake braket and stuff was not there and that normally keeps pressure on the pads but i dont understand and like i say they were pretty shady it seemed like any suggestions for a solution? thanx!!

 

come on guys i know this is a popular mod and im sure some have ran into similar problems w/ after market stuff would really appreciate the help

 

If they were shady why did you let them work on your car?

The e-brake stuff will have no effect on your pedal. Keep your master, it's fine. I recommend bleeding the heck out of the system...they probably got air in it and didn't take the time to bleed it fully...I'll bet they took your money tho.

Good luck.

Ed

 

well didnt realize they were shady till after when i got the car they said nothin and let me go w/ the old proportioning valve knowing i had about 10% back brakes then said they didnt know what would cause it i had to do the research myself then i took it to them and they were like oh we thought u had already changed that instead of saying oh we obviously dont know what we r doin like we said we did. then on top of that i told them to inspect the ring and pinion and backlash and such on the rear end goin in it and they said okay then about 7 months later it completley shredded had about 7 teeth intact after ward. so deff. shady

 

are the rear calipers the delco or the pbr calipers? and ed i thought you had to use the ebrake to adjust the rear brakes? i thought that everytime you use it it ratchets and brings the pads closer to the rotor?

 

not sure off the top of my head and im at work so i dont have the reciept w/ me but all i remember is i got them from car quest and they came red and where listed as loaded calipers and i belive i paid like 120 a piece for em. but i can see if i still got the reciept at home

 

Pics would help too..

Ed

 

well i dont have a digital camera i do have a dv video camera but i dont have the fire wire cord for it just yet. but ill try and find the reciept to them or something and get a pic of them online. but do u think it would have anything to do w/ not having the ebrake braket?? would i need to use some sort of shims mabey?? cause my brakes where fine w/ rear drums so i doubt it was the booster and i switched to a prop. valve for rear discs, and u guys say it wouldnt be the master cylinder. but i did look up the master cylinder for that year and the rear drum and rear discs are two diff. part numbers i belive u guys can double check if u wanted but thats what i found on advanced autos website if i recall corectly. but thanx for all your help so far.

 

No, the e-brake bracket will have nothing to do with your pedal being soft and spongy but you DO need it in order for your rear calipers to be adjusting properly. Your old style rear calipers used an internal e-brake design and using it keeps your rear calipers working right. IMO, I'd change out those calipers as they are known for not working right in the first place but you've spent the money already so you'll have to deal with what you have.

As for the different part numbers of the masters, all cars regardless of rear discs or drums got the same master from '90 and up so this isn't an issue. If you changed out the prop valve to the right one for your rear discs, this also isn't an issue...

Again, look into bleeding the system fully and also into getting a lawyer to make those guys get your money back or do the job right. You paid them to fix your car's brakes and it looks like they didn't know what they were doing and your life depends on your brakes working right.

Ed

 

so your saying i need the ebarake to adjust the calipers i have now even though they r after market ones. and what do u mean these are known to not work right cause that sucks they cost me some decent money considering my funds are low only being 20. and the master cylinders you say r the same for the 90 and up but the rear end came out of either an 87 or 89 not a 90 and up the 90 and up is just what its in now if that makes since. but yes i bought they proportioning valve for an 87 iroc w/ rear discs and that helped alot but still feels real spungy i think they just didnt bleed it from the master cylinder back after they put it on i can only hope thats it at least.

 

k i was wrong i got them from a place called koi here in lexington but i found the reciept to them they r part number RC6032 you can find them on raybestos web site cause thats what brand they r...the site is linked in the koi website and its adress is koiautoparts.com but when u go to raybestos site it dont show up by that number i think its like rmc or rnc6032 they put an extra letter in there but u can search under 87 iroc loaded calipers thats what i got. r these the ones u said they have trouble working right?? please help.