ok, i have posi, both my wheels spin in the same direction when car is up on jacks. also, both wheels peel. my car was all stock when i bought it in 1998. no mods were done untill i got it. so no one changed the rear-end. but i got the packet from PHS. but it doesnt say i have posi. also. i have 3.23 rear gears, but that was only with G92. i think PHS isnt telling my all about my RPO codes.

here are my RPO codes.
B84,MX1,VJ9,QYH,C60,K35,A90,A01,TR9,B34,B35,AU3,A31,UN3,N33,CD4,B20,B48,CC1,LU5.

do you think maybe the car was not ordered right and they lost some info at the dealer??

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RED82TA5.7L
this car has a bad tranny untill middle of January 2001(im crying inside) soon to be 350 Raptor TH350 from http://www.transmissioncenter.net
1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
Eldebrock Headers, 3" Hooker Cat-Back, duel outlet with quad tips.
Mods: 1.6 Proform Roller Rockers, electric fan, Corvette 5.7L computer chip, K&Ns.
Audio: JVC Kameleon CD deck, Jenson 4x6 front, Eclipes 6x9 rear, 2 10" mTx T4000 powered by a mTx 200watt amp.
Black Powder Coated 1990 16x8 Formula Wheels with 245/50/ZR16 Perelli P7000.
For Pictures go to
http://members.theglobe.com/RED82TA57L/mycar/


A cool Trans Am site with Message Boards http://www.transamgta.com

 

G80 is the code for posi-traction. If you dont have that code, you dont have posi.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I'm sorry i can't help you with your question but i have one for you: Does PHS just ask you for your VIN # and they tell you everthing in the dealer's records? Or did you have to give them the RPO codes. The reason i ask is that i dont have any RPO codes in my car and if they know what the original ones for my car were I am very interested in it. Thank you,
John

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84 Firebird w/ T/A gfx, 350 4bbl (LM1), Non-leaking T-Tops (new rubber all around), Auto, Working headlights (new parts), K&N, 180* thermostat, ram-air hood scoop, flowmaster muffler (yuk), Accel cap & rotor, MSD Super Conductor Wires. Soon: new gray interior, SFCs, poly bushings, WS6 sway bars & springs.

 

Kevin91Z: if i dont have posi then what do i have?? do you think maybe the dealer messed this order up

johns84bird: you only tell them the VIN.. they give you the RPO codes



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RED82TA5.7L
this car has a bad tranny untill middle of January 2001(im crying inside) soon to be 350 Raptor TH350 from http://www.transmissioncenter.net
1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
Eldebrock Headers, 3" Hooker Cat-Back, duel outlet with quad tips.
Mods: 1.6 Proform Roller Rockers, electric fan, Corvette 5.7L computer chip, K&Ns.
Audio: JVC Kameleon CD deck, Jenson 4x6 front, Eclipes 6x9 rear, 2 10" mTx T4000 powered by a mTx 200watt amp.
Black Powder Coated 1990 16x8 Formula Wheels with 245/50/ZR16 Perelli P7000.
For Pictures go to
http://members.theglobe.com/RED82TA57L/mycar/


A cool Trans Am site with Message Boards http://www.transamgta.com

 

I am right at this moment looking at the Firebird Illustrated Buyers Guide third edition. RPO code G80 is Limited-slip differential, not posi-traction. However, posi-traction and a limited slip differential are basically the same. They both transfer driving force to both rear wheels at all times. This explains why "both wheels peel". I'm also assuming that RED82TA5.7L must have a transplanted engine (or is misinformed) because the top dog for 1982 was the 5.0L dual EFI 305 Crossfire-Injection V-8 engine available under RPO code LU5. This package included the Crossfire-Injection V-8 and limited-slip differential among other things. The 5.7L engine was not offered in Firebirds until 1987.

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'89 Firebird Formula-
K&N Air Filter, Holley Throttle Body Air Foil, Hotchkis Strut Tower Brace, Hotchkis Panhard Rod, Hotchkis Trailing Arms, Kenny Brown Subframe Connectors, GT Auto Assesories aero wing

 

89FormulaRoth, so limited-slip came with LU5, and yes i put my 350 in. it was a 305. what else came with the LU5 package. i really want to know, thanks.

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RED82TA5.7L

1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
New TH350 Raptor with a shift-kit, Eldebrock Headers, 3" Hooker Cat-Back, duel outlet with quad tips.
Mods: 1.6 Proform Roller Rockers, electric fan, Corvette 5.7L computer chip, K&Ns.
Audio: JVC Kameleon CD deck, Jenson 4x6 front, Eclipes 6x9 rear, 2 10" mTx T4000 powered by a mTx 200watt amp.
Black Powder Coated 1990 16x8 Formula Wheels with 245/50/ZR16 Perelli P7000.
For Pictures go to
http://members.theglobe.com/RED82TA57L/mycar/


A cool Trans Am site with Message Boards http://www.transamgta.com

 

Limited slip is not kind of like Posi-traction....It IS Posi-traction. Posi-traction is GM's trade name for Limited Slip. Limited slip is the technical term and then each car manufacturer gives it their own trade mark name.

Chrysler called their LSD "Sure-Grip" and I cannot recall what exactly what Ford calls theirs.

GM makes a lot of different types of limited slip differentials, all called Posi-traction. But what people are confusing are the the different types GM made.

And Kevin is correct on the RPO code, it is G80. If you have an LSD, but no RPO code, possibly someone replaced the rear axle or had it installed later.

 

Something I've found in dealing with RPO's lately is that the early cars from 82 up to 85 don't have all the rpo's as a later model car would have. Its very possible that you have options that aren't listed on that card or in the records, as its also possible that the codes may have included additional options. The bummer is there isn't any way to really know for sure.

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Drew
The lone Thirdgenner of the Apocalypse
predatorman@hotmail.com
My Website
87 Iroc
91 Formula 14.3@98mph
91 RS Convertible
91 Firebird V6
92 S10
98 Grand Am GT

 

Thanks for basically repeating what I said Glenn. Other names for a limited-slip differential are posi-traction, sure-grip, equal-lock and no-spin. And Red, sorry but I loaned my Illustrated Buyers Guide to a friend for the weekend, so I'll have to get back to you.

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'89 Firebird Formula-
K&N Air Filter, Holley Throttle Body Air Foil, Hotchkis Strut Tower Brace, Hotchkis Panhard Rod, Hotchkis Trailing Arms, Kenny Brown Subframe Connectors, GT Auto Assesories aero wing

 

thanks for the info guys.

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RED82TA5.7L

1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
New TH350 Raptor with a shift-kit, Eldebrock Headers, 3" Hooker Cat-Back, duel outlet with quad tips.
Mods: 1.6 Proform Roller Rockers, electric fan, Corvette 5.7L computer chip, K&Ns.
Audio: JVC Kameleon CD deck, Jenson 4x6 front, Eclipes 6x9 rear, 2 10" mTx T4000 powered by a mTx 200watt amp.
Black Powder Coated 1990 16x8 Formula Wheels with 245/50/ZR16 Perelli P7000.
For Pictures go to
http://members.theglobe.com/RED82TA57L/mycar/


A cool Trans Am site with Message Boards http://www.transamgta.com

 

Glenn, I think the name for Ford's limited-slip differential is Traction-Loc, but I'm not sure. Also, I'm not disputing that Posi-Traction is GM's trade name for limited-slip. What I was trying to say earlier is that the G80 option is part of the LU5 option package.

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'89 Firebird Formula-
K&N Air Filter, Holley Throttle Body Air Foil, Hotchkis Strut Tower Brace, Hotchkis Panhard Rod, Hotchkis Trailing Arms, Kenny Brown Subframe Connectors, GT Auto Assesories aero wing

 

A limited slip axle was not part of the LU5 cross-fire option. limited slip axles were req'd with rear disc brakes. I had a '82 Z28 Indy, it had a LU5 without limited slip. Chris

 

cs2000, all I can say is that I'm getting this info from the Firebird Illustrated Buyers Guide. It says LU5 came with a limited-slip differential. Maybe the book is incorrect or maybe there was some delete option I don't know about.

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'89 Firebird Formula-
K&N Air Filter, Holley Throttle Body Air Foil, Hotchkis Strut Tower Brace, Hotchkis Panhard Rod, Hotchkis Trailing Arms, Kenny Brown Subframe Connectors, GT Auto Assesories aero wing

 

RED82TA5.7L, I finally got my book back and this is directly from the book: "Dual EFI engine package (avail. on Trans Am only; incl. 5.0-liter dual EFI 305-ci Crossfire-Injection V-8 engine, 215/65R15 blackwall steel-belted radial tires, special handling package, limited-slip differential, sport hood, front and rear power disc brakes, and dual exhaust system" The price for this was $899.00 without Y84(I'm not sure what Y84 is) and no charge with Y84.

 

well. i have rear drum, so maybe that is what y84 is. thanks for the info.

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RED82TA5.7L

1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
New TH350 Raptor with a shift-kit, 2600 stall torque converter, Eldebrock TES Headers, 3" Hooker Cat-Back.
Mods: 1.6 Proform Roller Rockers, electric fan, Corvette 5.7L computer chip, K&Ns.
Audio: JVC Kameleon CD deck, Jenson 4x6 front, Eclipes 6x9 rear, 2 10" mTx T4000 powered by a mTx 200watt amp.
Black Powder Coated 1990 16x8 Formula Wheels with 245/50/ZR16 Perelli P7000.
For Pictures go to
http://members.theglobe.com/RED82TA57L/mycar/


A cool Trans Am site with Message Boards http://www.transamgta.com

 

 

Thanks 82RECAROTA


------------------
RED82TA5.7L

1982 Pontiac Trans Am
Cross-Fire Injected 5.7l V8
New TH350 Raptor with a shift-kit, 2600 stall torque converter, Eldebrock TES Headers, 3" Hooker Cat-Back.
Mods: 1.6 Proform Roller Rockers, electric fan, Corvette 5.7L computer chip, K&Ns.
Audio: JVC Kameleon CD deck, Jenson 4x6 front, Eclipes 6x9 rear, 2 10" mTx T4000 powered by a mTx 200watt amp.
Black Powder Coated 1990 16x8 Formula Wheels with 245/50/ZR16 Perelli P7000.
For Pictures go to
http://members.theglobe.com/RED82TA57L/mycar/


A cool Trans Am site with Message Boards http://www.transamgta.com

 

First, CS200, you could get disks with an open diff. I have one. An '83. I think Roth is right in that there are delete codes for posi's because of mostly the Northeast. Anywhere it snows. Posi scares the living you know what out of some people, especially women. I'm sure you could order any combo of drivetrain without it. Delete codes are a grey area because they are usually used very little. Every '93 4th gen Formula came standard with A/C unless you knew about a little known delete code that would take it off and return you $800. No dealer in the world would order one without air unless a customer knew it could be ordered that way and did so. I dought 99% of the dealers knew about it. Gm does ALOT of stange things. Like the fact you CANNOT buy a new Trans AM without t-tops. I tried.

Y84 is Recardo or GTA depending on the year ofcourse.

How 'bout Twin Spin? .....AMC

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Kenney
82 Trans Am WS7 notchback
83 Trans Am WS6 T-tops
72 Vista Cruiser 455
90 Olds Trofeo
80 K-10 w/snow plow
Painter @ Chevy dealer
GM junkie

 

Where can I obtain the RPO codes for my 86 T/A? Can these be obtained from the VIN? any help would be appreciated....

 

That is weird I had a 1984 trans am L69 3.73 disc rear and open diff that is wierd. Now my new 84 ta has limited slip 3.73 rear....go figure.. Kevin

 

If one could not read the code stamped on the axle from the factory and the tag is no longer on the pumpkin, how else can you tell if it is a "posi"? Will both wheels turn forward and back if you spin the pinion? Or do you have the take off the plate to look inside? What should oyu look for? thanks

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'85 Z28 Copper/ Gold, LG4
dual snorkel w/ ram air, Accel Cap Rotor and 8MM wires, Edelbrock Headers, Catco Cat, Flowmaster 80 series
American Racing Wheels. 350 crate in the future.

 

rusty, the easiest check for posi is this. Jack up both rear wheels. Leave it in park. If you can't turn the wheels, you have posi. If it turns, and the other moves the other way, you are open. You then double check your work but putting it in neutral. Turn a wheel. If both turn the same way, you have posi.
...ed

 

Well just to inform you all , that when a one legger starts to go it will act as if it is a posi, the car is an 82 , so i would have it checked , my 83 ta did the same thing , and an oldtimer I know told me about the one leggers acting like posi's when they start to go , so we checked it and sure enough it was shot , surprisingly it didnt howl at all , which is what they usually do. so i would have it checked , im not saying it is a one legger , but i would have it checked out.

 

Thanks for the input guys. I know the axle is original and since it's an auto, the open 3:08 is all it could be. It just suprised me that both wheels moved simultaneously with the pinion. I tried the "park" trick and you were right. Fortunately I'm swapping it for a 3:23 posi next week.

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'85 Z28 Copper/ Gold, LG4
dual snorkel w/ ram air, Accel Cap Rotor and 8MM wires, Edelbrock Headers, Catco Cat, Flowmaster 80 series
American Racing Wheels. 350 crate in the future.

 

rusty z it probably doesn't matter, but the autos came from the factory with 2.73 rear gears and the manuals came with 3.08.