theformula

Currently i have a non posi 3:73 in my speed density formula. I want better traction. I noticed in JEGS they sell a mini spool made by AUBURN. It replaces the internal components of your open differential to effectively lock the axles together for for even power distribution to both rear tires.

Anyone used this. Is it any good?
thank you

Kevin91Z

iTrader: (1)

Speed Density means your formula is a 90-92? If so you can use the SLP take-off torsen posi unit. It'll fit your 3.73 gears if they're for a 3-series carrier, because thats what the posi is.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

theformula

Hi Kevin, nice talking to you again.

Could you tell me more about the SLP torsen? It would fit a nonposi rear? How much do they run for?

thanks

Kevin91Z

iTrader: (1)

You can find it on the internet specials page at http://www.slponline.com/ Its $100, and it fits late model thirdgens with 28 spline axles, and 3 series gears. It'll replace an open rear end just fine.

theformula

I looked on their internet specials page and it could find it. I have a 92 firebird formula 5.0liter TPI with a 3:73open rear end.

Could you tell me the part number or where its located? It would greatly be appreciated.
thank you kevin.

Kevin91Z

iTrader: (1)

http://www.slponline.com/slpperforma...yspecials.html

Its the second to last item on that page, part number 64501T $99.95

ede

a mini spool replaces your spider gears and locks the rear, both wheels pull all the time. great on a race track very bad on the street.

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ICON MOTORSPORTS

theformula

ede, thanks for the respone. Why would the mini spool be bad on the street? (forgive my ignorance)

CanadianBeast

It would be bad because it dosen't allow the wheels to spin at diferent rpm's. So if you like to go around corners at all you'll have a tough time of it.

Birmass

Yeah, the minispoool isn't great for the street, but you want the auburn unit which comes in the new firebirds and camaros. It's fine.

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88 firebird formula
350 Vortec TBI
214int/224exh, .471int/.491exh
Edelbrock headers
SIX-speed
Eats LS1's with a 2.73 open rear and 2 1/4 stock catback

My Formula

[This message has been edited by Birmass (edited September 26, 2000).]

theformula

Thanks for the responses guys. I appreciate it. I am looking at the SLP takeoff torsen. Now how do I check to see if my rear is compatible with this SLP product. Something about a 3series carrier?

Birmass

As long as you have a 3-series carrier and 28 spline axles(90 and up) it will fit. Earlier years can use it too as long as they have a 3-series carrier, you just have to get 28 spline axles. I've heard good things about the torsen. It's $299, but I think it's well worth it. The regular one ($99) is supposed to be good too since it came stock in the newer f-bodies.

------------------
88 firebird formula
350 Vortec TBI
214int/224exh, .471int/.491exh
Edelbrock headers
SIX-speed
Eats LS1's with a 2.73 open rear and 2 1/4 stock catback

My Formula

Kevin91Z

iTrader: (1)

3 series carrier means you need to have 3.23, 3.42, 3.73, etc gears. A 2-series carrier is 3.08, 2.73, 2.56, and lower.

theformula

OK I did some checking today and my rear is a 3 series carrier (3:73 open so thats what im guessing), and a 10bolt. On the housing of the rear it said : GM N
2252 2676

the last thing I need to check is the axle correct? I need to have a 28spline?

How do I check this? I have no clue what car this rear came off.

[This message has been edited by theformula (edited September 26, 2000).]

CamaroMike

What the Hell! Screw changing the carrier and shiming up the rear backlash. Just buy a Powertrax Locker from Summit or Jegs and replace the spiders in your driveway. In about 2 hours you will have spool straight line traction and be able to take corners without chewing up tires or being out of control. Not to mention putting stress on weak 7.5" ten bolt axles anyway.

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84 Camaro ZZ4 with HOT cam. 1.88 60' (12.98 @ 105MPH E.T.)
Other Mods: You name it and I have probably changed it.

91 Firebird 5.0L TBI

ASE Certified Auto Tech
LIVE AND DIE BY THE ALMIGHTY BOWTIE!

[This message has been edited by CamaroMike (edited September 28, 2000).]