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Old 04-26-2007, 12:28 AM   #1
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Location: Marietta, GA
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Car: '91 Firebird Convertible
Engine: 305 TBI (LO3)
Transmission: 700r4, Vette Servo
Axle/Gears: 3.27 9 Bolt, PBR disks

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Posi Rear: What can you tell about it?
I think I have a winner but DAGGUMIT, I don't know what I'm looking at.

Is this a limited slip diff or not?








The gearing is right. It looks in good shape. The price is doable.

IS IT A POSI?

~cry~
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Old 04-26-2007, 12:31 AM   #2
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Location: Rio Oro de Santa Ana, San Jose, Costa Rica
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Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

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Re: Posi Rear: What can you tell about it?
That's limited slip.
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Old 04-26-2007, 12:41 AM   #3
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Join Date: Aug 2004
Location: Marietta, GA
Posts: 4,142
Car: '91 Firebird Convertible
Engine: 305 TBI (LO3)
Transmission: 700r4, Vette Servo
Axle/Gears: 3.27 9 Bolt, PBR disks

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Re: Posi Rear: What can you tell about it?
Schweet!

Another way to spend money on my car.

Any suggestions on other things I should change/replace when I swap this diff?
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Old 04-29-2007, 12:45 AM   #4
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Location: Flowood,MS
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Car: 87 IROC Z
Engine: 5.7 L98 TPI
Transmission: 700r4,2500 stall
Axle/Gears: G80,10 bolt 3.42's

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Re: Posi Rear: What can you tell about it?
Apeiron,or anyone else.What are you looking at to tell thats limited slip.I`m going to service my diff soon and I`m wondering if mines either swapped or messed up cause I almost always leave one black mark.Sometimes its on different sides.My rpo code says G80 so it should have come with limited slip but I dont think its acting like it.Thanks.
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Old 04-29-2007, 01:49 PM   #5
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Join Date: Jan 2000
Location: Rio Oro de Santa Ana, San Jose, Costa Rica
Posts: 19,819
Car: 1984 Z28 Hardtop / 1988 IROC T-top
Engine: 383 Carb / 305 TPI
Transmission: 4L60 / T-5
Axle/Gears: 3.54 Dana 44 / 3.08 10 bolt

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Re: Posi Rear: What can you tell about it?
It's got springs and other strange gizmos in it. If you open it up and all you see is gears, then it's an open differential.

Of course, just because it has LSD doesn't mean that the LSD still works, it could be worn.
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Old 04-29-2007, 01:49 PM
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