General Maintenance & Repairs Leaks | Squeaks | Clunks | Rattles | Grinds
Sponsored by:
Sponsored by: CARiD

?'s about posi traction

Thread Tools
 
Search this Thread
 
Old May 11, 2007 | 09:11 AM
  #1  
allbaugh_04's Avatar
Thread Starter
TECH Fanatic
15 Year Member
iTrader: (6)
 
Joined: Apr 2007
Posts: 1,546
Likes: 19
From: Omaha, NE
Default ?'s about posi traction

First off I'm pretty new here. Second, all V8's 98-02 had posi traction correct. I have a 2000 Z28 and I was watching the driver side rear tire when i was spinning the tires to see if it was spinning and it wasn't. Yet there's tire marks on the passenger side. I just did it enough to see if both tires were spinning and i wasn't doing a burnout really. Obviously, my posi traction isn't working correct? What can I do to fix it and how much? My dad knows quite a bit about cars. You think we could do it ourselves? Thx in advance
Reply
Old May 11, 2007 | 09:45 AM
  #2  
408Maro's Avatar
TECH Fanatic
20 Year Member
iTrader: (14)
 
Joined: Dec 2004
Posts: 1,287
Likes: 0
From: San Jose,CA
Default

yea we have em and the gear ratios for 6 speeds have 3:42's and i THIBK autos have 3:23's not too sure but i noticed that as well that on a lift my car does it as well and everyone thinks i have a open diff. but when i roast them they shut up
Reply
Old May 11, 2007 | 10:39 AM
  #3  
NeoTINS's Avatar
Teching In
 
Joined: Mar 2006
Posts: 16
Likes: 0
From: Merrill, WI
Default

It's not "posi", it's a limited slip. Basically this means that if you're going around a turn the limited slip will let the wheels turn at a little bit different speeds so that the tires don't chirp and jump. But if you let it rip, the limited slip locks up and both tires go.

If it were true posi, every time you went around a corner your rear end would jump around and the tires would chirp.

PS Don't flame me...this is a "layman's terms" version.
Reply
Old May 11, 2007 | 11:05 AM
  #4  
Ericbigmac83's Avatar
TECH Addict
iTrader: (19)
 
Joined: Mar 2006
Posts: 2,157
Likes: 0
From: Owings, Md
Default

Originally Posted by NeoTINS
It's not "posi", it's a limited slip. Basically this means that if you're going around a turn the limited slip will let the wheels turn at a little bit different speeds so that the tires don't chirp and jump. But if you let it rip, the limited slip locks up and both tires go.

If it were true posi, every time you went around a corner your rear end would jump around and the tires would chirp.

PS Don't flame me...this is a "layman's terms" version.
WRONNNNGGGG, so very wrong
Reply
Old May 11, 2007 | 11:09 AM
  #5  
allbaugh_04's Avatar
Thread Starter
TECH Fanatic
15 Year Member
iTrader: (6)
 
Joined: Apr 2007
Posts: 1,546
Likes: 19
From: Omaha, NE
Default

Well tell me what your car does then when you hold the brake and push the gas just enough to make your tires turn....cuz only the passenger wheel turns on mine.
Reply
Old May 11, 2007 | 11:23 AM
  #6  
Ericbigmac83's Avatar
TECH Addict
iTrader: (19)
 
Joined: Mar 2006
Posts: 2,157
Likes: 0
From: Owings, Md
Default

ive got a manual with 4.10s, i spin both my tires all the time, no problems at all.

Id give it more gas then it sounds like you are. make sure you only hold the brakes enough to keep the car from moving. Smoke the tires some and see if the one is still only turning. If you really smoking up the one tire and the other one is just sitting there doing nothing then theres something broken in your differential
Reply
Old May 11, 2007 | 11:26 AM
  #7  
408Maro's Avatar
TECH Fanatic
20 Year Member
iTrader: (14)
 
Joined: Dec 2004
Posts: 1,287
Likes: 0
From: San Jose,CA
Default

i cant sit there and roast them om my 6speed ill burn my clutch out or something so thats why i got my line lock ahahha
Reply
Old May 11, 2007 | 11:32 AM
  #8  
NeoTINS's Avatar
Teching In
 
Joined: Mar 2006
Posts: 16
Likes: 0
From: Merrill, WI
Default

Originally Posted by Ericbigmac83
WRONNNNGGGG, so very wrong
Hey Ericbigmac83...what exactly was the point of your post?

If I'm wrong, tell me (and everyone else) why. As-is, your post is completely uninformative, and utterly useless.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old May 11, 2007 | 11:41 AM
  #9  
Ericbigmac83's Avatar
TECH Addict
iTrader: (19)
 
Joined: Mar 2006
Posts: 2,157
Likes: 0
From: Owings, Md
Default

Originally Posted by NeoTINS
It's not "posi", it's a limited slip. Basically this means that if you're going around a turn the limited slip will let the wheels turn at a little bit different speeds so that the tires don't chirp and jump. But if you let it rip, the limited slip locks up and both tires go.

If it were true posi, every time you went around a corner your rear end would jump around and the tires would chirp.

PS Don't flame me...this is a "layman's terms" version.
Alright, let me go through this.

Your definition of limited slip is correct enough, under straight line both axles turn at the same speed and under cornering it allows them to turn at different speeds. the limited slip give more torque to the wheel that isnt slipping

A limited slip = a posi, They are the same thing, Posi is just GM's name for it

You are confusing a posi with a spool, A spool is not actually a differential since it locks the axles and gives them equal power at all times. This obviously doesnt work well for cornering since it does not allow the outside wheel to turn faster, thus causing the chirping around corners.

A locker in layman's terms is like a spool except it does allow the axles to dissengage to allow the outside wheel to turn faster around corners

Hope that clears it up
Reply
Old May 11, 2007 | 12:47 PM
  #10  
Ericbigmac83's Avatar
TECH Addict
iTrader: (19)
 
Joined: Mar 2006
Posts: 2,157
Likes: 0
From: Owings, Md
Default

Just wrote that up in detail in the rearend section, they should sticky it
Reply
Old May 12, 2007 | 05:51 AM
  #11  
NeoTINS's Avatar
Teching In
 
Joined: Mar 2006
Posts: 16
Likes: 0
From: Merrill, WI
Thumbs up

Originally Posted by Ericbigmac83
Alright, let me go through this.

Your definition of limited slip is correct enough, under straight line both axles turn at the same speed and under cornering it allows them to turn at different speeds. the limited slip give more torque to the wheel that isnt slipping

A limited slip = a posi, They are the same thing, Posi is just GM's name for it

You are confusing a posi with a spool, A spool is not actually a differential since it locks the axles and gives them equal power at all times. This obviously doesnt work well for cornering since it does not allow the outside wheel to turn faster, thus causing the chirping around corners.

A locker in layman's terms is like a spool except it does allow the axles to dissengage to allow the outside wheel to turn faster around corners

Hope that clears it up
I accept your apology...J/K

Thanks for the (very thorough) explanation! I appreciate it!

Cue the music..."The More You Know!" =)

Reply
Old May 12, 2007 | 06:07 AM
  #12  
koolaid_kid's Avatar
TECH Junkie
iTrader: (21)
 
Joined: Jul 2005
Posts: 3,023
Likes: 1
From: Indianapolis
Default

Well, the thing you have to realize is that, without the posi all the power would go to the passenger's side. The posi forces some of the power to the driver's side. But it is not 100% efficient, and the passenger's side still gets some small percentage more than the driver's side. That is why drag racers go with a spool. It locks the axles, so they both turn as one.
Reply




All times are GMT -5. The time now is 07:56 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE