Im building the 10 bolt in my 84 z28 to handle a 300 to 350hp motor so far i decided on a nice rear girdle, moser axles, 4.10 richmond gears. I still need a nice posi since this is a open rear. Whats a good inexpensive posi everything i seen is all eaton and atleast 500+

 

Go to a junk yard and get a zexel torsen from a 99-02 LS1 Camaro/Firebird. Should be dirt cheap. Although, if you do that, you might as well just swap in that whole rear, because most yards charge just as much for the diff as the rear.

 

Good and inexpensive eh? That's pretty much an oxymoron having those two words in the same sentence. Lol. Seriously though, I agree with The Scary One. The Zexel-Torsen units from the 4th gen cars are a durable, affordable posi. The only drawback to using one of those is the fact that you have an 84 rear, which has 26 spline axles. GM upgraded to 28 spline axles in 1990, so the Torsens require 28 spline axles, which means you'd have to locate a set of axles from a 90-92 thirdgen to use it. Yeah, I've seen the price in Summit and Jegs for the Eaton units, and it's outrageous. However, there's several Ebay store sellers that have them for about $370, which is a hell of a lot cheaper than $500+. You can also find Torsens on there from time to time. That's where I bought my Torsen, and I only paid about $120 for it. I've also seen brand new Auburns on there, which is what we got originally in our cars, for about $200. They're not as good as the Eatons, but they do last quite a while under normal use. Whatever you do, avoid the Gov-Loc units. They came in the early thirdgens and most of the 7.5" S-10 trucks, and they're nicknamed "grenade-lock" for a reason. They literally explode into pieces even at moderate power levels. I'd also avoid the Powertrax or Richmond no-slip units. They're very rough and jerky in operation. If you go shopping for a Torsen, keep in mind that they made them in both 2 (3.08-down) and 3 (3.23-up) series. The 3 series will work with your 4.10's.

 

Oh, and SLP makes a set of plates that you should use when using the Zexel Torsen with gears higher than the three series.

http://www.lmperformance.com/784/8.html

 

http://store.summitracing.com/partde...5&autoview=sku

hows this look im guessing the eaton and auburn units are clutch style this is a cone type like the 9 bolt.

 

Good call there Scary. I forgot all about that. It's actually the "paddle" that goes between the two axles that they sell. Of course, since SLP sells it, they think it's gold plated, and they cost about as much as the whole carrier when you buy one off Ebay. Hmmm, I'm starting to think the Torsen is gonna be an expensive way to go, since he'll need different axles, and possibly the SLP paddle. I can't remember if you have to have it for 4.10's, but it's a must-have for 4.56's. Hey Greenbird, the Auburn units are a cone clutch style posi. The Eatons are the only ones I know of that are the traditional, clutch plate style. While you pay a little more for an Eaton, it really is worth it due to the fact that they're fully rebuildable. Auburn has a replacement program for their units if you buy it brand new from them, but it sounds like a bunch of to me. I think it's like a 3 year warranty, and most Auburns usually last at least that long, so by the time the cones burn up, you're probably screwed. If your main objective if getting a really good quality unit, I'd have to say a new Eaton unit off Ebay is going to be your best bet. You may even get lucky and find an auction for a used one on there while you're looking. Since they're rebuildable, if you got a used one cheap enough, it still wouldn't be a bad deal. The rebuild kits for them run about $90 IIRC, and you might not even need the kit depending on the condition of the unit. The Auburn Pro Series units are quite strong, but they're still not rebuildable, and only about $30 cheaper than the Eaton. There's also the Truetrac locker units for about $300 the last time I looked. I don't know much about them though, so I really couldn't make a recommendation there. Once again, just make sure to stay far away from the Gov-Loc and the Powertrax/Richmond lockers. They're miserable to drive on the street.

 

Wow, just looked on Ebay. Looks like prices have gone up since the last time I browsed there. The Auburns are $400 new, and the cheapest Eaton I saw was about $450. Still cheaper than Summit or Jegs though. I did find this one in the link below. Doesn't specify a brand name, but it looks like the Eaton style. http://cgi.ebay.com/ebaymotors/NEW-G...spagenameZWD1V

 

The detroit true-trac (what i'm buying) is $375, and is a similar design to the torsion.
Good luck finding a Torsion, or a 4th gen equipped with one at the JY
There's also the power-trax lock right, it's somewhat cheap.

 

Pay attention to the title of the post. He said he want's a GOOD inexpensive posi. That's why I've pointed it out twice to stay away from the Powertrax unit. That's not just an opinion either, since I had one for a while. Trust me, they suck. Might as well put in a spool, it'd probably be smoother. Lol. More predictable whatever the case.

 

Sorry, I didn't notice you mentioning the power-trax yet.
Nightrider_87 on here runs one down into the 11's and swears it's a great piece, but everyone else on here hates it. Either way it's a smidge MORE $$ than a true-trac anyway, and I haven't heard anything bad about the true-trac yet.

PS- the powertrax replaces the spiders in your existing open carrier, in case anyone needed to know that.

 

The Zexel shouldn't cost much. They are all over ebay. Even V6 cars 90 or 91 up had 28 spline axles. Last time I looked I could get a pair of used 28 spline axles for like 25 bucks.

 

did anyone see the link i posted earlier a posi made by strange its a cone type little cheaper then the auburns

 

No worries Sonix. Having had one myself, I won't knock them at all when it comes to using one for the quarter mile. I beat on mine for 8 or 9 years before taking it back out, and there wasn't hardly a blemish on the teeth. So when I bash on them, it's not a durability issue. The reason I usually try to steer people away from them is the fact that most members here drive their cars on the street more than they go to the track. For solid traction to both axles, the Powertrax units are fantastic. The problem with them is they're quite noisy and jerky. Mine used to lock sometimes halfway through a turn, and it'd make such a loud bang, you'd swear an axle just snapped in half. Not to mention, it'd cause the rear of the car to jerk sideways when that happens. If you were on wet pavement or snowy roads, that could be pretty disastrous. I also hated how noisy and jerky it was in parking lots. The sharper you turn, the more it'd jerk. That's embarrasing when you're out cruising on the weekend. Everybody's looking at your car like it's a POS. Lol. If I was building a car for the dragstrip, I wouldn't hesitate to use one, but for street driving, a clutch type posi, or a torsen are much better to use.

 

Checked out that link you posted. That is, in fact, an Auburn unit. Strange just attached their name to it. You can't mistake an Auburn carrier. They look pretty distinctive from anything else. Did you check out that link I posted? I'm betting U.S. Gear probably makes the one in the link I posted. I remember seeing an ad somewhere a while back for them. They must've struck some kind of a deal with Eaton because it looks identical to the Eaton units.