Hey guys, I wanna put a limited slip in my 84. It's a Z28 H.O. with a 700R4 and a 475HP stroker. I know my rear is a 10 bolt open dif. I think it has 308 rear gears but I'm not positive. My local shop put a mini-spool in it. It was fine untill I drove it on the interstate in the rain. I wound up down the embankment and into a chevy dealerships fence. The car wasn't harmed, but I think a limited slip might be safer for a steet car. I would rather the slip wasn't one that had clutches or whatever. I'd like it to be something I can have installed and then forget about so I don't have to go back into it at a later date. I also don't know what kind of 10 bolt. Any suggestions?

new or used?

u can go to the junkyard and spin the wheels of any car and if both spin the same way when u turn them, then its a limited slip, or positraction as chevy calls it. as far as gears go, i wouldnt be positive when it comes to what years came with what ratio, but theres a thread floating around about that so just search it. also, i recommend the clutchpack style limited slip, as opposed to the torsen worm gear, and the cone style. the torsen is nice and all but not made to handle the strip, and the cone isnt rebuildable. the clutchpack style is just better for a racing application. but if you decide your car isnt going to be used in the strip, then look for a torsen.

You probably need to get a new Eaton 26 spline posi. You will not find an Eaton in the junk yard becasue they were never installed in a 3rd gen from the factory. All of the 3rd gen cars got the Auburn or Governor Lock, which I don't recommend. You will need a 2 series posi for the 3.08 gears. I'm not sure if Eaton makes a 2 series, so you might want to consider a gear change too. Your 10 bolt will be the 7.5 with 26 spline axles.

If you want something cheap then you might want to go with a used Auburn. I might have a 2 series Auburn that will save you from having to change the gears. If you are interested I can see if I have one. The Auburn won't last anywhere near as long as the Eaton.

Unless you broke something, the mini-spool had little to do with your spinning off the road in the rain.

Personally, unless you find a jy posi, and you know how to properly set-up a gear, I wouldn't spend too much money on the 10-bolt. If you have an honest 475hp and hook-it up decently at all, you're borderline on a stock 10-bolt. If you step up to a new posi, axles, gear, girdle cover, etc, you just as well save a little longer and get a 12-bolt or S-60.

FYI - not trying to be a d!, but from scanning your other posts you're asking a lot of questions that can be answered from a search. With the amount of info on this site, a search will tend to give you more answers on general questions than anyone will re-post.

what is the diference between auburn, governor, and eaton. the car will only see a strip 3 or 4 times in it's life. It's a daily driver, that does a lot of street racing. I've got the 16 inch iroc rims with BF Goodwrench drag radials in back. It will leave a lot of rubber when it launches. Not a lot of traction, but it still shuts down most of the cars I've ran against even whith the loss of traction. I don't think I'll be able to afford a custom rear end for the car. I'm gonna have to mod the one I got.

The engine was dyno tested before it went into the car. I know it will lose some before it gets to the ground but I don't know how much. It's strong enough to shred the original 700 it came with. I had to have another one built. I have no idea what the 1/4 mile time is. But it's faster on the street than a ss4th gen, 440 4 barrel 73 challenger, every mustang I've run, my 85 vette and my friends 94 vette. It's pretty quick. I did have to have the drivers side axle replaced.

What would that auburn cost me?

The Gov Lock was designed to work in stock GM trucks, and it does a very good job for what it was designed for. It has too many small parts thaqt break easily when abused in a performance car.

The Auburn wear out quick, leaves powdered metal in the rear end and can not be rebuilt.

The Eaton posi is the best street,strip differentail for GM cars. It is adjustable, rebuildable and lasts much longer than most limited slip differentials. Best differential for the money.

If I have a good Auburn I'll sell it for $150 or $200, depending on it's condition. I'll have to check to see if I have a 2 series. I have a lot of used differentials.

cool man let me know if you find it.

Sorry, I must have sold all of the used Auburns. All I have for the 7.5 is some standard differentials and Governor Locks.