We have talked about going POSI many many times in this section but axel's, selection, work and price seams to kill it quick.

Well what do you know but there is a POSI that will work with out 28 spline and its only $100. Could this really be true, yes it is.

Who wouldn't spend $100 for POSI???

a mod can/could lock this and continue the discussion over in this thread.

https://www.thirdgen.org/techbb2/sho...hreadid=209996

I just had to let / make sure everyone got wind of the very very neat news.

Oh and can I borrow $100???


Matt

 

now the 99.95 + shipping question;

What's a series 3 differential, & which cars have it? ( looks like 89~02 according to the pic)

 

I *THINK* it's only 91 and up, but I could be wrong.

That SLP posi unit has been talked over 100 times. Anyone who's been on the board for over a month should know about it.

 

Ive been a member since "10-02-2001" and never once have I heard of a $100 POSI that will fit in my rear. Soon as you bring up POSI everyone starts saying you need new axel's.

in this section I have never seen anyone mention it.
I would own one already if I had.

Matt

 

yeah i started that thread and was surpriesd to see a 100 posi, i plan on getting one in the next few days and ill let ya know how it goes

 

The 89 cars may or may not have the 28 spline axles as that was the changeover year anything newer that that has 28-spline axles.

 

I really want 4.10 gears and would have to/want to re do the seals well but a $100 POSI unit makes every that much cheaper.

The biggest hit was allways the POSI unit. the other parts can be picked up cheap in good used shape off ebay and a seal kit. It becomes well worth the time and money.


Matt

 

Whats the biggest advantage in have POSI?

 

If I'm wrong say so but didn't some s10 s15 what ever come with the right axles and 4.1-4.11 which ever???

I found this interesting.

"I'm running the HD Torsen with BFG drag radials, no breakage yet with 3 years and counting.

The Torsen really isn't a posi like conventional Auburn and whatnot, it doesn't mechanically lock both axles for output. Burnouts tend to be one wheel, then the other wheel, then back to the first wheel, etc. Granted they're better than open diff, but for all-out drag racing you'd want something else.

Now, on a road course, the Torsen really shows it's stuff. I can accelerate out of a turn with the pedal to the floor and not lose control. Do that with a mechanical posi and both wheels break loose, you're swapping ends."

I like everything he said.

a POSI just get more power to the ground.

Matt

 

Okay, but how?

 

I'm seriously surprised that you've never seen that on here....we've talked about it 100 times.


It's a good unit, I forget which years it works for.
I was going to put one in my Z28 when the rear went, but i bought one with one already in it along with 3.42's.

 

ahh just put a spool and let one wheel hop around the corners. just vrom ber ber ber ber . lol. see if I could do it I'd steal the rear out my wifes cutlass. posi with 3.23's. but for a posi why not just do a total rear upgrade? find a junkyard and try for a rear from a z/ta with posi and disk brakes which would have around 3.23's or if the car looked hyped alil ya may luck out and get like 3.73's or higher. plus you'll have the better axles.


and don't forget if you do get disk ya need the master cyl and prop vlv

 

posi puts more power down (sorta) because it puts power to both rear tires where open diff only goes to one (under most circumstances).

the ZT posi is great for drag racing...it locks when a heavy load is applied to it. my car spins both tires A LOT when i stand on the gas.

 

What's odd is sometimes instead of locking both right off the bat, you can feel the other lock in and start.

 

Actually OvrClk350 you're wrong; I think we talked about the SLP take-off about 1000 times, not 100.

Yep 91-92 f-body axles will be 28 spline.

1990 might have 28-spline. This is the change over year. You'll have to pull the cover off and the axleshafts out to check.

1982-1989 will NOT have 28 spline; they'll be 26 spline.

Center section from an S10, including gearset, will work, but only f-body axleshafts will fit our axle.

Rear disc axles have an axle flange with a smaller diameter (for the rotor to slide over) then rear drum axles. If you have rear discs and get axles from a rear drum axle, you'll have to have the flange turned down.

I don't know if you guys remember but about a year ago I was bitching b/c the lock bolt broke on a junkyard f-body axle from a '90 v6. I was going after the shafts to get the Torsen posi and put that in my 3.73/posi/disc to replace the toasted eaton gov-lock. Those axles are damned hard to find; and if that lock bolt breaks in the diff, you're SOL unless you can get some hardcore tools in there to either spin the bolt out (a straight shot with a drill bit is impossible) or crack the diff in half with a chisel.

 

Tom, I never remember anyone ever saying anything about a $100 POSI of any kind. That price makes everything look much much sweeter.

I havnt even seen a used one for that cheap. I wonder how many of them you could sell on ebay before people caught on to the right price.

Matt

 

paskey, a POSI traction or limited slip differential (LSD) is a verry complicated thing, i never knew how it worked until i saw the inside of an open diff and read up on it here

theres alot of info on that page, hop it helps you understand why what they are talking about is so awsome, especially for 100 bux, i might look into that, wonder how much i can get a new axel for?

 

Just do a <a href="search.php?s="><img src="images/top_search.gif" alt="Search" border="0"></a> for "SLP posi" in the "V6 forum" and you'll see all our old messages... or, leave off the forum selection (and search all tech boards) for every thirdgen.org message.

A few guys have just dropped it in but the correct installation procedure should be followed (backlash and preload and etc).

 

Yup

 

Nope wont work. The retarded search wont accept word with less than 4 letters. Makes finding things real fun and that search button almost useless sometimes.

Matt

 

did they change it? i thought it was a 3 letter minimum, at any rate...it does make it hard to search many times.

 

Besides the 28 spline axles,you need 3.23 or better gears to use the Zexel unit.

 

lucky me i got 3.42s(*** i think thats the right number lol its late) stock =) well i ordered the slp today for my v6 so we will see if its worth the money, ill let you all know how i like it, hopefully will be here next week and installed the same day if all goes well

 

screw you & your 28 spline axles

 

YAY!!! its like xmas alrady.....well it arrived today but i cant put it in till monday =( anything i should know about putting it in...backlash and torx specs? all info would be helpful

 

How bought a pic of what it really looks like and what you got in the box. Does it have any directions?

 

Uh-oh. That scares me, and it's not even my car!

Better go buy <a href="http://store.summitracing.com/partdetail.asp?part=RMG%2DVIDEO" target="newwin">part number RMG-VIDEO</a> from Summit Racing first.

 

All you need to know is how to look in the phone book to find a place to take it. That's my suggestion.

 

if you do it yourself....one thing that you need to know is that the bolts holding the ring gear to the carrier are left-handed threads. they turn backwards, i don't know why but that's how it is.

 

im doing it at school with my teacher on monday, and hes done it before to his astro which is the same rear end just 26 spline axels so im not to worried about putting it in. thanks for the left handded thread info.....ill try to get some pics when i get the digi...no instructons either just basically a box and a posi lol

 

well its in, i dont see why you all were so worried about the install, i finished it in 3 hours no real problesm...adujusting the backlash was about all that was difficult, took about 30-40 mins. sorry no pics before install but the pic on the website is pretty close. i havent started testing it yet gonna let it get settled in for awhile before i start roasting it. im out
Steve

 

Cool, let me know how you like it, i have this unit also, just waiting to have it installed.

Good Job

 

bring it to me ill do another one lol

 

That's the part I was worried about you setting incorrectly... then you'd be out buying a $200 gearset to replace the busted one. Most guys think you can just bolt it in and drive away... might work half the time.. not worth the risk- Glad to hear it worked out perfect!

 

i cant imagine not adujusting all that, the factory shims are not even close to what it should be, im bout exhuasted after working on that and lowering a sunfire gt 2 inches today and tomorrow i get to put a whole engine together for class.. i need sleep...
hmm what to do next the the mighty 3.1?