Like I said in the subject. The car is an 85 or 86 LB9 auto with RPO gu5 wich is 3.23 rearend. It's mine free installed, all I need to know is if its posi.

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87 Z28 305 TPI, Auto, LT-1 cam (peanut is history), 2.73, Gutted air boxes, K & N fillters, SLP Airfoil, Dyno Max 3" cat back, Accel 8.8 mm spirals, Accel cap and rotor, Accel coil, rapid fires, and 170* Stat.
Old Best 15.414 @ 87.47.

 

Should be

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92 Z28 L98 350
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Ported stock heads, XR270HR-10 cam, TES headers, Crane AFPR, Flowmaster catback, MSD ignition components, #24 SVO injectors.
Best ET 13.3@107 mph
"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)
Click here to see my car at Truspeed.org

Check out TruSpeed at http://www.truspeed.org
Check out the Bin Archive at http://www.truspeed.org/bins.html

 

not necessarily... plenty of early/mid 80s Z28s left the factory with open rear ends. I believe Jim85IROC's car had a 3.42 open rear end when he bought it.

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91 Trans Am WS6
Bright White
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

Built on Wednesday

 

the rear on my 86 Z28 is RPO code GU5, its a 3.23 rear, but it's not a posi. hope this helps

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86 Z28 red,
originally LG4,
new 350,
non comp Qjet,
T-5 five speed with new clutch,
stock 3.23 gears,
K&N Air Filter (best 35 bucks i ever spent!)
Edelbrock Performer intake,
crane 272H cam,
Accel 8mm wires,
Edelbrock performer cat- back,
Homemade cold/forced air intake.
KYB GR-2 struts and shocks.
Grant GT leather wrap steering wheel.
Sony X-plod stereo.
Optima 6x9's

Future mods:
NOS, Edelbrock TES headers, hi flo cat., 4th gen interior, 6 point roll cage, 3.42 gears
hurst billet/plus shifter, Edelbrock STB, IROC Rims

cars i've beaten:
95' Avenger, 88 Mustang GT, 70' Mustang , 97 Dodge Ram, 94 firebird formula, 92 Mustang GT, 94' 3000GT VR4, 97' Accord Rice Rocket (just barely), countless many ricers....

 

G80 is the RPO for posi

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ICON Motorsports

1st & 3rd

 

my 84 was'nt a posi