Transmissions and DrivetrainNeed help with your trans? Problems with your axle?
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Okay so i have a 92 camaro rs, tbi no biggy, so this guy is offering me a rear end off a 92 trans am says it's posi and wants 150 bucks for it, i am very tempted to buy it, what i want to know is what exactly and i going to have to replace, i hear prop valve and master cylinder, im sure someone has done it, what exactly do i need and what kinda labor time am i looking at, im goin to do the swap myself and getting ahold of parts is easy since i work at an auto parts store, I'm new to here so any help would be greatly appreciated.
That question been answered a million time (no joke!). Even worse than that, is that but there is even a STICKY about this at the top of the Forum that you posted in!
[b]Okay so i have a 92 camaro rs, tbi no biggy, so this guy is offering me a rear end off a 92 trans am says it's posi and wants 150 bucks for it, i am very tempted to buy it, what i want to know is what exactly and i going to have to replace, i hear prop valve and master cylinder
Welcome to TGO.
The following link will provide the info you require for the swap, which is straightforward and can be accomplished with basic hand tools, if necessary.
Thanx man, i know that question is redundant but im new and idk how to work this site yet, I apoligize.
No apology required--we were all new at some point. The board has an incredible number of intelligent members who are nearly always helpful. Should you have questions about your intended swap, don't hesitate to ask.
JamesC
__________________ "There are more things in heaven and earth, Horatio, / Than are dreamt of in your philosophy." Hamlet
"Convictions are more dangerous enemies of truth than lies." Nietzsche
Stephen is right, the question has been asked before many, many times. By doing a search and reading everything you can about the subject you will learn a lot and be able to ask very intelligent questions. I've done the rear disk swap, and James is also very knowledgeable on this subject. Either of us will be happy to help you after you have done your homework.
And James is right, if you don't know to use the search your first time here how will you know if someone doesn't tell you.
Thanx guys, you all are gentlemen and scholars, Okay so i looked into it, the later models have metric proportioning valve fittings, so i would need to get a proportioning valve off a later model car??, and as for the master cylinder i saw conflicting post about it, some say you swap it, others say you don't?
Yeah i hear that and am very aware, he said both tires spin when you turn one and i know in order for it to be a working posi both have to spin in the same direction, is there any other way to tell:?
You can pull the cover and look, and you need to do that to check the ratio anyway. You may get lucky and it's a 9 bolt. But........that is a double edged sword. If it's not worn out and had a good gear ratio then your set. But if it needs repairing you better have a fat wallet. If it's a 10 bolt the tires will probably turn the same way by hand, but that doesn't mean it will actually work. Probably 99% chance the posi won't work actaully. The Auburn's didn't last long at all.
I did the LS1 rear disk swap and tried it without changing the prop valve. Went around the block, scared the crap out of myself, and got home and put the disk/disk prop on. Major difference for my car. But............others have had success without changing it. I think it's like James said, GM went to the extra expense of having a different valve for the disk/disk applications, so it would be silly not to use the valve that they designed for this.
As for masters I'm using a 4th gen one. Came off a disk/drum car and works perfectly and is smaller and much cleaner looking. It was off a 95 car, so had to reflare one line for it, but not a biggie. I read that the LS1's are a direct swap with no flaring needed.
The prop valve is not avalaible at a parts store or from GM. Give Ed Miller a shout on here. I think he still has some new ones available.
i looked into it, the later models have metric proportioning valve fittings, so i would need to get a proportioning valve off a later model car??, and as for the master cylinder i saw conflicting post about it, some say you swap it, others say you don't?
From about 84+ all were metric; however, the tube nut threads changed from M1.0 to M1.5, IIRC, in late 89. If you can purchase the proportioning valve along with the rear, you'd be good to go. There's no need to change the master cylinder (for more info check the thread that I posted above).
JamesC
__________________ "There are more things in heaven and earth, Horatio, / Than are dreamt of in your philosophy." Hamlet
"Convictions are more dangerous enemies of truth than lies." Nietzsche
Yeah i hear that and am very aware, he said both tires spin when you turn one and i know in order for it to be a working posi both have to spin in the same direction, is there any other way to tell:?
Both wheels spinning in the same direction means little. With the car in neutral, one wheel on the ground and one wheel in the air, see how hard it is to spin the one in the air. It should be pretty hard with just your hands. The spec is somewhere around 35-40 ft/lbs.
i did this swap myself and it is pretty simple. also, ive heard and been told about the prop valve and still use the same one for disc/drums. works fine, sure i might not be getting my full braking but it brakes very good still. also, it would be a good idea to change the fluid in it. and if it is a posi dont forget the special addative for posi units. guess i got lucky because my posi worked perfect...however my calipers were fried and needed to be replaced. just adding my here because i'd rather fill you in and save a headache for you..actually all of us are. good luck!
i did this swap myself and it is pretty simple. also, ive heard and been told about the prop valve and still use the same one for disc/drums. works fine, sure i might not be getting my full braking but it brakes very good still.
Check out the section on combination valves in the following link:
thanks, good info there, should be a sticky. my brakes do work good, or for as much as i know they do. dont get me wrong by all means i do want to switch over to the right prop valve just havent gotten to it yet. plus i know that part is getting very rare to find.
she did sit around for a while (due to an engine swap) and im now driving it, tho its sitting again. (due to me finding a yoke for my 9 bolt).
before asking on TGO.
here because i'd rather fill you in and save a headache for you..actually all of us are. good luck! 
