How do I tell if my car had posi?
Thread Starter
Member
iTrader: (1)
Joined: Apr 2010
Posts: 160
Likes: 1
From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
How do I tell if my car had posi?
How do I tell if my car had posi originally and is worn out or if it just didn't have it. The car used to have a 5.0 HO from the factory.
Senior Member
Joined: May 2006
Posts: 581
Likes: 0
From: NY
Car: 00 SSEi / 94 C4
Engine: 231 / 383
Transmission: 4T65E / ZF 6sp
Axle/Gears: 2.93 / Dana 44 3:45
Re: How do I tell if my car had posi?
place a jack under the center of your DIFF.. raise both wheel off the ground...
put the car in neutral rotate one tire if it's POSI both wheel will turn in the same direction.. if it's a open DIFF.. they will turn in opposite directions..
do you have the RPO codes inside of the console ???
put the car in neutral rotate one tire if it's POSI both wheel will turn in the same direction.. if it's a open DIFF.. they will turn in opposite directions..
do you have the RPO codes inside of the console ???
Thread Starter
Member
iTrader: (1)
Joined: Apr 2010
Posts: 160
Likes: 1
From: Des Moines IA
Car: 91 RS, 84 Z28, 85 Iroc-z
Engine: 3.1L, 350 4 bolt, 350 TPI
Transmission: 700R4, 700R4, 700R4
Axle/Gears: 3.23, Unknown, Unknown posi
Re: How do I tell if my car had posi?
Well I've done that. My question is how do I tell if its worn out or if it just never had it. Yes I have the RPO codes
Senior Member
Joined: May 2006
Posts: 581
Likes: 0
From: NY
Car: 00 SSEi / 94 C4
Engine: 231 / 383
Transmission: 4T65E / ZF 6sp
Axle/Gears: 2.93 / Dana 44 3:45
Re: How do I tell if my car had posi?
look for G80
http://www.marshu.com/ws6-firebird-c...codes-2000.php
it's fun to decode what was installed in you car...
http://www.marshu.com/ws6-firebird-c...codes-2000.php
it's fun to decode what was installed in you car...
Senior Member
Joined: May 2006
Posts: 581
Likes: 0
From: NY
Car: 00 SSEi / 94 C4
Engine: 231 / 383
Transmission: 4T65E / ZF 6sp
Axle/Gears: 2.93 / Dana 44 3:45
Re: How do I tell if my car had posi?
to check it's function.. in park one wheel on the ground one wheel off
use a torque wrench set to 48LBS this would be normal when the wheel spins
if it's less the 48 your cone is worn
use a torque wrench set to 48LBS this would be normal when the wheel spins
if it's less the 48 your cone is worn
Senior Member
Joined: May 2006
Posts: 581
Likes: 0
From: NY
Car: 00 SSEi / 94 C4
Engine: 231 / 383
Transmission: 4T65E / ZF 6sp
Axle/Gears: 2.93 / Dana 44 3:45
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: How do I tell if my car had posi?
Do I Have a Limited Slip (aka Posi) (RPO G80*)?
Jerk the diff cover.** Open/Standard can be seen in the following link: https://www.thirdgen.org/forums/tr...1073-posi.html (posi?)
Gov-loc: https://www.thirdgen.org/forums/tr...rear-diff.html (3rd gen rear diff help!!)
Auburn: https://www.thirdgen.org/forums/tr...ing-axles.html (Tips/Tricks for Installing Axles, Bearings, Seals)
*Apparently, G80 was an extra-cost option which could be special ordered on any rear regardless of ratio.
**The most reliable way to determine if your car is equipped with a limited slip is to look. That said, this from big gear head: With the tires off the ground and the transmission in neutral, you should be able to turn one wheel and the other will follow in the same direction. This is limited slip or "posi". If the wheels turn in opposite directions, it’s a standard/open differential—OR a worn out limited slip.
JamesC
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Senior Member
Joined: May 2006
Posts: 581
Likes: 0
From: NY
Car: 00 SSEi / 94 C4
Engine: 231 / 383
Transmission: 4T65E / ZF 6sp
Axle/Gears: 2.93 / Dana 44 3:45
Re: How do I tell if my car had posi?
Pop the cove and take a peek. The following from the 10-Bolt FAQ:
Do I Have a Limited Slip (aka Posi) (RPO G80*)?
Jerk the diff cover.** Open/Standard can be seen in the following link: https://www.thirdgen.org/forums/tr...1073-posi.html (posi?)
Gov-loc: https://www.thirdgen.org/forums/tr...rear-diff.html (3rd gen rear diff help!!)
Auburn: https://www.thirdgen.org/forums/tr...ing-axles.html (Tips/Tricks for Installing Axles, Bearings, Seals)
*Apparently, G80 was an extra-cost option which could be special ordered on any rear regardless of ratio.
**The most reliable way to determine if your car is equipped with a limited slip is to look. That said, this from big gear head: With the tires off the ground and the transmission in neutral, you should be able to turn one wheel and the other will follow in the same direction. This is limited slip or "posi". If the wheels turn in opposite directions, it’s a standard/open differential—OR a worn out limited slip.
JamesC
Do I Have a Limited Slip (aka Posi) (RPO G80*)?
Jerk the diff cover.** Open/Standard can be seen in the following link: https://www.thirdgen.org/forums/tr...1073-posi.html (posi?)
Gov-loc: https://www.thirdgen.org/forums/tr...rear-diff.html (3rd gen rear diff help!!)
Auburn: https://www.thirdgen.org/forums/tr...ing-axles.html (Tips/Tricks for Installing Axles, Bearings, Seals)
*Apparently, G80 was an extra-cost option which could be special ordered on any rear regardless of ratio.
**The most reliable way to determine if your car is equipped with a limited slip is to look. That said, this from big gear head: With the tires off the ground and the transmission in neutral, you should be able to turn one wheel and the other will follow in the same direction. This is limited slip or "posi". If the wheels turn in opposite directions, it’s a standard/open differential—OR a worn out limited slip.
JamesC
Joined: Aug 1999
Posts: 19,282
Likes: 103
From: Lawrence, KS
Car: Met. Silver 85 IROC/Sold
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: How do I tell if my car had posi?
At this late date, hopefully the OP has found the answer to his question.
JamesC
JamesC
Supreme Member
Joined: May 2005
Posts: 1,057
Likes: 3
From: Malvern, Arkansas
Car: 90 IROC 2-92 Zs blk vert & prpl
Engine: stealth ram brodix track 1 ful port
Transmission: 700r4 4l80e
Axle/Gears: iroc 375 lokr 92 Z 277 pos vert 327
Re: How do I tell if my car had posi?
Watch the movie "My cousin Vinnie" They explain the posi function very well for a movie.
Member
Joined: Jun 2011
Posts: 227
Likes: 0
From: King George,VA
Car: 1985 Z28
Engine: '69 350 4 Bolt Main .30 Over
Transmission: 700r4/B&M Shift Kit and Flywheel
Axle/Gears: GM 10 Bolt 3.23 Gears
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