Welcome to Camaro Z28!

Welcome to CamaroZ28.Com, the ultimate Source for Camaro enthusiasts! Here you can join over 90,000 Camaro enthusiasts from around the world discussing all things related to Camaros and more. You are currently viewing as a guest which gives you limited access to view discussions

To gain full access to our forums you must register for a free account. As a registered member you will be able to:
  • Participate in over 40 different forums and search/browse from over 5 million posts.
  • Upload your Camaro details to your Garage
  • Post photos, respond to polls and access other special features
  • Gain access to our free marketplace to buy, sell and trade Camaros, parts and more.
All this and much more is available to you absolutely free when you register for an account, so join our community today today!

If you have any problems with the registration process or your account login, please contact support.


Go Back   CamaroZ28.Com Message Board > 1967-2002 Powertrain Discussion > LS1 Based Engine Tech
Sign in using an external account
Register Forgot Password?
Register Garage Photos Blogs FAQ Members List Social Groups Links Calendar Search Today's Posts Mark Forums Read Z28LiveVendor Directory TSBs


Reply Post New Thread
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 07-25-2002, 08:00 PM   #1
Registered User
 
Join Date: Jul 2002
Posts: 266
Post Posi-Traction Rear?

I'm new to these Camaros =) I have a 2002 Camaro SS. Is the rear end posi-trac? Or what? I'm not even 100% familiar what that means, but someone asked me today - claimed he had a 98 Z28 that was, and I didnt know...

------------------

-2002 Red Camaro SS
Chesapeake, Virginia
http://www.HeadRushPerformance.Com
This ad is not displayed to registered members.
Register your free account today and become a member on CamaroZ28.com!
Desolate_Flux is offline   Reply With Quote
Old 07-25-2002, 08:18 PM   #2
Registered User
 
Join Date: Nov 2000
Location: Charleston,SC
Posts: 747
Smile

Posi traction or LSD as you'll sometimes hear it called is basically the same thing.There is a minor difference but for now it works like this:
-When you step on the gas both rear wheels turn.Where as with an open rear end only one tire turns.
Hope that helped.There is an entire technical speil that I'm not 100% sure about but that's the basic concept.Good luck.
Kevin

------------------
1998 Black Z28 A4
-------1/8-------
8.584 @ 83.64 MPH
Taylor 10.4mm wires,!EGR,!FRA,SLP Lid,MAF Ends,IAT Tricker,TB Bypass,Manual Fan Switch,and Dynomax Cat-back

BMR STB and Sub-frame Connectors

Pics
__________________
2006 Silverado 1500
1995 Trans Am Convertible
nikkev is offline   Reply With Quote
Old 07-25-2002, 10:36 PM   #3
Registered User
 
Capn Pete's Avatar
 
Join Date: Jan 2002
Location: Oshawa - Home of the 5th-gen
Posts: 5,311
Smile

Posi-traction / Posi-trac / "Posi" / LSD - Limited Slip Differential / whatever you want to call it --- here's what happens:

inside the differential, the posi unit uses a set of springs and a clutch pack to stop the spider gears from turning, which in essence "locks" the rear axles, so that when the drive shaft turns the main ring gear, both axles will turn together as if they're one. If the rear end were an open type, both wheels will still turn, but if one tire was on pavement, and the other was on ice (for example), then the tire on ice would spin free, since there is no friction on that side, but the tire on the pavement would not move, therefore, the car would go nowhere. If a car with posi was put in the same situation, both wheels would want to turn, so even though one is on ice, the one on the pavement would still turn, and your car would move.

The benefit of a posi rear end is that, in a race or at the track, if one tire cannot get the same traction as the other, it will not allow that one wheel to start spinning and let the other one slow down --- both wheels are forced to turn at the same speed. HOWEVER, the posi does allow the axles to turn at different speeds if one wheel becomes lodged (ie: in off-roading situations), or while going around a corner (one wheel is allowed to slow down so that your rear tires don't squeal so bad going around the turn). If the car had a solid axle, it could or would snap in those situations, so the posi allows some of the differential function, without sacrificing straight line traction.

That's a little better explaination for ya! Click the image to open in full size.

BTW: all Z28's and T/A's (and SS's/WS6's) have LSD's.

------------------
2002 Z28 - A4, 2.73's, Blk/blk, leather, T-tops, sport appearance package - just bought on June 26, 2002! - Pics

1981 Z28 - 383, TH350 trans., 3.42 posi - sold August, 2000 - Pics

1973 Camaro - Dad's & my project in the works - to be built: 355 Chevy, 11.5:1 pop-ups, "camel hump" heads (w/2.02 valves), solid cam, 4-speed.....it should be quick! - No Pics yet.
__________________
2002 Z28: M6, 3.73's, Strano Suspension (HP3) - Goes, Turns, Stops, and even Flies.
1993 Z28: Road Race car - LT1/T56 - SoloSprint #95 - Goes, Blows, Goes and Blows.
1973 Camaro: Dad's - 355, TH350, 4.10's.
1981 Z28: 383 c.i., TH350, 3.42's - sold August, 2000.
Capn Pete is offline   Reply With Quote
Old 07-25-2002, 10:39 PM   #4
Registered User
 
Join Date: May 2001
Location: Memphis, TN, USA
Posts: 1,122
Post

The short answer ....

"yes"



------------------
2001 TransAm WS6, M6 3.42
HPP, TBB, 160* t-stat, MTI Lid, Holley PowerShot, Flowmaster 80, Port/Polish MAF

2001 Z28
-- R.I.P. - 06/25/02
__________________
West TN F-Body Association

2001 TransAm WS6, M6 Best time: 12.8 @ 108 --- 330 RWHP / 347 TQ
rncotton is offline   Reply With Quote
Old 07-25-2002, 10:49 PM   #5
Registered User
 
Capn Pete's Avatar
 
Join Date: Jan 2002
Location: Oshawa - Home of the 5th-gen
Posts: 5,311
Wink

Quote:
<font face="Verdana, Arial" size="2">Originally posted by rncotton:
The short answer ....

"yes"
</font>
Click the image to open in full size.that was the short answer!? Click the image to open in full size. Click the image to open in full size. Do you want the long answer?? Click the image to open in full size. Click the image to open in full size.
__________________
2002 Z28: M6, 3.73's, Strano Suspension (HP3) - Goes, Turns, Stops, and even Flies.
1993 Z28: Road Race car - LT1/T56 - SoloSprint #95 - Goes, Blows, Goes and Blows.
1973 Camaro: Dad's - 355, TH350, 4.10's.
1981 Z28: 383 c.i., TH350, 3.42's - sold August, 2000.
Capn Pete is offline   Reply With Quote
Old 07-26-2002, 03:36 AM   #6
Registered User
 
Join Date: Oct 2001
Location: Corpus Christi, Texas, US
Posts: 390
Post

Think of it this way, when you are going strait power is given evenly to both wheels, as you turn the outside wheel is given more power. Plus i think these things have detroit lockers, look into that.

------------------
'02 Red Z28, ebony leather, M6, T-tops, Trac. cont., hurst shifter
Borla (the expensive cut-out), Wisperlid W/K&N, FRA, Cags eliminator, Strange 4.10's, G2 Rear Girdle, Valv. Synthetic 10W-30, Redline gear oil, Fat hurst shift ****, Lead foot

Soon to be:
Alpine Screen, Orion xtr 800.4, xtrpro 1000, Kicker 12L7 in a milhouse, Focal polykev K2's, Focal utopia 6" audiom midrange.
__________________
'02 BRR Z28 M6, hurst shifter, Borla, Wisperlid W/K&N, Bauer TB, g5x1, HAL QA1's, eibach prikit in back, bmr LCA-LCA reloc.-adj PHR, QTP LT's, TTII's, Panasonic dfx99, Orion xtr 800.4, xtrpro 1000, Kicker 12L7 in a milhouse, Focal polykev 6.5 K2's.

borla and lid => 330.2 rwhp 344.4 rwtq
redz_02 is offline   Reply With Quote
Old 07-26-2002, 07:21 AM   #7
Registered User
 
Join Date: Jul 2002
Posts: 266
Post

Kick *** description guys, thanks!

Just one question, just for clarification. My Car has LSD/Posi/whatever then?

So all Camaros do? Or only Z28/SS? Or whats the story there? =)

------------------

-2002 Red Camaro SS
Chesapeake, Virginia
http://www.HeadRushPerformance.Com
Desolate_Flux is offline   Reply With Quote
Old 07-26-2002, 09:50 AM   #8
Registered User
 
Join Date: May 2001
Location: Memphis, TN, USA
Posts: 1,122
Post

Quote:
<font face="Verdana, Arial" size="2">Originally posted by Desolate_Flux:
Just one question, just for clarification. My Car has LSD/Posi/whatever then?</font>
This was what my "short answer" was referring to.

Yes .. your ccar has posi.

__________________
West TN F-Body Association

2001 TransAm WS6, M6 Best time: 12.8 @ 108 --- 330 RWHP / 347 TQ
rncotton is offline   Reply With Quote
Old 07-26-2002, 02:50 PM   #9
Registered User
 
Join Date: Jun 1999
Location: OR
Posts: 2,374
Post

98+ Z28 all have Torsen diff's. actually the Torsen's don't have clutch's.. instead they have smoe wierd gear arrangement that somehow transfers tq between wheels when it senses slippage....

Then, there is then Auburn(spelling?) posi option, that uses clutches..


Quote:
<font face="Verdana, Arial" size="2">Originally posted by Desolate_Flux:
Kick *** description guys, thanks!

Just one question, just for clarification. My Car has LSD/Posi/whatever then?

So all Camaros do? Or only Z28/SS? Or whats the story there? =)

</font>
Ken S is offline   Reply With Quote
Old 07-26-2002, 03:33 PM   #10
Registered User
 
Capn Pete's Avatar
 
Join Date: Jan 2002
Location: Oshawa - Home of the 5th-gen
Posts: 5,311
Arrow

ALL Z28's, SS's, T/A's and WS6's come with LSD's. It's standard - not an option.

However, AFAIK, V6 Camaros & Firebirds have the option of an LSD. I could be wrong on that though. Click the image to open in full size.
__________________
2002 Z28: M6, 3.73's, Strano Suspension (HP3) - Goes, Turns, Stops, and even Flies.
1993 Z28: Road Race car - LT1/T56 - SoloSprint #95 - Goes, Blows, Goes and Blows.
1973 Camaro: Dad's - 355, TH350, 4.10's.
1981 Z28: 383 c.i., TH350, 3.42's - sold August, 2000.
Capn Pete is offline   Reply With Quote
Old 07-26-2002, 05:55 PM   #11
Moderator
 
PhantomTA's Avatar
 
Join Date: May 1999
Location: Chelsea, MI
Posts: 2,885
Send a message via AIM to PhantomTA
Post

Did someone say our cars have Detroit Lockers?

hahah

Anyways

Posi and Limited Slip are almost the same thing. if you wanted to get all techy, then no we dont have Posi's we have limted slips.

Odds are this guy had either the Torsen or Auburn Limited Slip anyways.

Ignore people like that, they havnt the slightest idea whats goin on.

------------------
DaveD
1998 WS6 #207
-ARE Stage II Head/Cam
1998 Regal GS
-It Has Boost

The Phantom of CamaroZ28.com
Http://PhantomTA.cz28.com
__________________
When I first came here, this was all swamp. Everyone said I was daft to build a castle on a swamp, but I built in all the same, just to show them. It sank into the swamp. So I built a second one. That sank into the swamp. So I built a third. That burned down, fell over, then sank into the swamp. But the fourth one stayed up. And that's what you're going to get, Lad, the strongest castle in all of England.
PhantomTA is offline   Reply With Quote
Old 07-27-2002, 07:20 AM   #12
Registered User
 
Join Date: Nov 1999
Location: Lincoln Park, MI US
Posts: 446
Post

Posi (actualy called Posi-Traction) is simply the name GM gives to the Limited Slip Differentials that they put in their cars, FOrd calls them Trac-Locks (or used to at least, dont know if they still do) and Chrysler had a different name for them back in the day. They are all the same thing, which was explained already so I wont get into that.

The Torsen is a different animal, However I think GM still calls it a Posi, even though it isnt an LSD. It is a torque biasing differential, and both tires need to be under load for it to "lock up" its an oddball design. The company that makes detroit lockers also makes a nearly identical unit to the torsen, which is probalby where someone heard that they come with a Det locker.

ALL 98 Z28's came with Auburn limited slips. The torsen or a heavy duty Auburn unit could be had in an SS in 98. In 99 the standard unit became the Torsen, with the auburn heavy duty available as an option in the SS. (I assume this applys to the Firebird/WS6/Firehawk in the same manner, but I never looked into it)
Freak is offline   Reply With Quote
Old 07-27-2002, 07:20 AM
 
Reply Post New Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 11:21 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO ©2010, Crawlability, Inc.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Copyright © 1996-2013 CamaroZ28.Com. All rights reserved.