rzaron53

I'm looking to buy a 1989 hardtop, MT, 305 TPI Iroc with the G92 4WDB option. Does anyone know how many were produced as described? I have found a few drum brake TPI cars and a few disk brake t-tops so far but not the one I am looking for, so Im wondering what my chances are. According to this website 20,067 irocs were produced in 89 but thats as far as it goes.

THanks,

okfoz

the best you will find is the number of each option produced for the entire run for the year... THere is no break out for the number of T-top IROC's for example... Technically speaking the information would be extractable but GM does not usually release that info.

Standard catalog of Camaro would probably have the information for each of the options.


John

rzaron53

I found this but it still doesn't really help. Narows it down a bit though.

"Of the Camaro's built (in 89), 79.9% had automatic transmission, 20.1% had a 5-speed manual transmission,
11.6% had power 4-wheel disc brakes, 27.9% had a limited-slip differential, 89.7% had power door locks, 55.7% had power windows, and 40.3% had T-tops."

If I assume the ratio of manuals and T-tops is maintained for the 4WDB cars then I get only 467 like the one I want. Seems pretty rare! d'oh! Maybe I may as well try to find one of the 111 1LE's!!

DJP87Z28

With your numbers you are correct. Few people ordered & bought the type of your you want.

aaron7

iTrader: (7)

It's not all that hard to find around here, so I would say they aren't really rare.

I have an 88 TPI, T5, hardtop, loaded, but with drum rear and G92... though I thought all G92's were disc...?

DJP87Z28

Rear disc brakes were a required option (Rpo J65) on 350 cars only. Otherwise you had to order them special & G92 cars with a 305 did not get them standard, everything was a extra cost option..

okfoz

That is true to a point, in the early 90's there were rear disk shortages, and some of the 350 cars got Aluminum drum breaks.

John

rzaron53

According to what I've read on this site in the tech section and others is that with the G92 option rear disks are required on autos and 5-spds. The G80 rear end was the one with the alloy drums. Not true?

rzaron53

I mean from 89 to 92 that is. The pre 89 rear disks were crappy anyways. 89-92 got the austrailian PBR calipers and 12" disks. THats what I'm talking about. I bought one for my G80 car from Hawks for $500.

Later

DJP87Z28

Just for your info G80 is the rpo for a Limited slip rear and has nothing to do with the gear ratio . also the PBR rear brakes are 11.655 dia rotors with single piston aluminum calipers.

rzaron53

Geez, I rounded up, so sue me....

okfoz

Your statement is mostly correct. Typically speaking the G80 is an option. However there were certain years where specific gear ratios that were Posi only or not availble with posi.

THe following were the ratos and the years that were Posi only:
2.77 gear from 87-89.
3.08 gear in 87
3.27 gear in 87, 89-91
3.45 gear From 85-87 & 89-90.
3.70 gear From 85-86.

The following are the ratios that were not offered with the G80:
2.41 gear in 1982
2.77 gear in 1986
3.73 gear in 1987

FIREBIRD ONLY Bty, not sure about Camaros.

John

DJP87Z28

Your statement is true, however; they were required options and you still paid EXTRA for them. I know I did when I bought my IROC in 87. And for your info its not a "Posi" but a limited slip. GM stopped using that term , check what the RPO for G80 says for 3rd & 4th gen cars.

Mark_ZZ3

There was 1426 camaros built in 1989 with G92.

Mark.

okfoz

Interesting, according to my Firebird 1989-1992 parts and illustration catalog, GM still calls it "Positraction".

I guess it may depend on where you look may determine the name.

John

DJP87Z28

Well look what the RPO tells you (G80 rear axle, Limited Slip)not some catalog. GM has NOT used that name in it sales info for many, many years. Just a nickname that stuck around " Posi" for a Limited Slip rear.
Now you know.

okfoz

THe Parts and illustration Catalog makes no mention of "Limited Slip" only Positraction.

The GM Production option books also calls it "G80 Axle Positraction, Limited Slip" I have 2, one from Dec 1993 and one from Feb 1997.

The Pontiac sales lit from 87 - 92 however only states "Limited Slip differential" So you are correct in that statement.

So to the public they referred to it as "Limited Slip" yet to dealers, and for parts information they still call it "Positraction"



John

rzaron53

Mark_ZZ3,

Do you know the answer to my origional question? How many 1989 hardtop, MT, G92, 305 TPI Iroc's were produced?

THanks

Mark_ZZ3

The 1,426 is the only unique number I can find. The other ones are higher and include more cars. So yours is 1 of 1,492, and I would then guess that there is a ratio of 350 vs. 305 5 speed that you could use to narrow this down even further. It is hard to say since there isn't any records of groups of option codes.

Personally ... 1 of 1492 is a nice low number. I'd say yours is probably 1 of 700-1000 with a 305 5 speed. Chances are there wasn't any 305/auto with G92, only a 305 5 speed or 350 auto.

The only other lower option codes where P43 (inflator spare tire delete) and UL5 (radio delete). And of course 1LE.

If your car is Canadian ... then there is a service here that might be able to give you a better breakdown ... but only for Canadian cars.

Mark.

demonspeed

12" or 11.6" - That's almost a half inch, and in the realm of brakes, that is a lot.

Eaton is about the only company that calls their limited slip carriers a Posi anymore.

f-crazy

iTrader: (-1)

speaking of your "nice low number" comment hows this one for ya...in 91 there were only 164 GTA's with the LB9 and MM5....a little more then half of those 164 came with LB9 and G92....

NoItsNotForSale

iTrader: (1)

I had no idea G92 was that rare. Makes me love my car even more.