I I'm assuming all disc brake rear ends came with posi right? And if so, what is the common gear that came in them? This came out of a 82-92 Camaro, not sure what year.

 

My disk rear did not come with posi. 3.73

 

Ok, well I'm definitely going to pull the cover when I go look at it, if not it's still a decent upgrade to disk rear

 

Idk bout the posi but the rear discs were used in the later years I believe

91' firebird .. 305 TBI .030 over , balanced bottom end , speed pro hyper flattops , 10.6:1 CR , all ARP rod bolts and main studs , melling HV oil pump , trick flow super 23 175cc heads, Howards HR 214/218@.050 .488/.495 lift on 114 LSA , full roller 1.6 RR = .520/.528 lift , summit dual plane intake port matched , shorty headers into 2.5" Y w full 3" flow master system and 3" cutout in front of axle , msd billet dizzy, 620cfm TBI , custom CAI , tubular adjustabke LCA pan hard , umi torque arm wonder bar , BMR trans cross member , COMP engineering SFC's, disc rear w 4.10's, drilled an slotted rotors, EBL flash , VRFPR, WBO2,

 

Went ahead and picked it up, 60 bucks. Posi with 3.23 gears and disc brakes. Not too bad I don't think.

 

All years, 82-92.

JamesC

 

What's the best way to get surface rust off

 

Wire wheel on grinder , sand blast, Muriatic acid

91' firebird .. 305 TBI .030 over , balanced bottom end , speed pro hyper flattops , 10.6:1 CR , all ARP rod bolts and main studs , melling HV oil pump , trick flow super 23 175cc heads, Howards HR 214/218@.050 .488/.495 lift on 114 LSA , full roller 1.6 RR = .520/.528 lift , summit dual plane intake port matched , shorty headers into 2.5" Y w full 3" flow master system and 3" cutout in front of axle , msd billet dizzy, 620cfm TBI , custom CAI , tubular adjustabke LCA pan hard , umi torque arm wonder bar , BMR trans cross member , COMP engineering SFC's, disc rear w 4.10's, drilled an slotted rotors, EBL flash , VRFPR, WBO2,

 

The following may be helpful in narrowing year down a bit: Iron Delco-Moraines from 82-88, alum PBR's 89-92.

JamesC

 

I think I have a wire wheel laying around somewhere, gotta find the grinder

 

No.

The rear in my car came to me with 3.23s, PBR brakes, and .... no posi. No sign of ever having been apart. Or even having the fluid changed for that matter.

Don't EVER "assume" ANYTHING. Break the word down into its three component parts: 3 letters, 1 letter, 2 letters, each a word. (sort of) Make an {1st word} out of {2nd word} and {3rd word}.

If it has cast-iron brakes, you probably made a mistake.

 

Why a mistake?

 

The Delco-Moraines have a bad reputation on TGO, which is why many members upgrade to something newer, 89+ for example. That said, I personally never experienced any issues with them (though I have since installed PBR's). A 'fit' kit is available. Check the 10-Bolt FAQ for more info.

JamesC

 

Would I be better off running my rear with the posi and have fun with that till it goes and sell the disc rear?

 

Bump, I read through the sticky, but as far as swapping drum to disc(whole rear end), is it all direct swap, including the lines and such? Looking for the combination valve as we speak but is it absolutely necessary to run one right now? I know I need it for optimum brake performance...but is it something I can put in in the future

 

Works toilet bowl cleaner. eats runs and grime then wire brush off.

 

Do you really have to spam all your car specs every time you post?

 

For what it's worth, I've had two pre-'89 disc brake rears under my car and both pairs of rear calipers were non functional. Basically worked the same as throwing the calipers off and plugging the rear lines. In my opinion, the most effective, bang for the buck upgrade is to install '98-02 rear discs or grab a later third gen rear with the PBR's. The 4th gen brake swap is so easy it's crazy. IF..... you start with a drum brake rear.


Agreed. I don't really care what kind of oil pump you have.