I have a 1988 trans am gta it is also a ws6 does this make it a G92? the only thing that i know would be different if its a G92 is the rear end ratio would anything else be different/better? the vin is 1g2fw2182jl230751

http://www.chevy-camaro.com/chevy-ca...ar.asp?year=99

im i supposed to find those numbers in my vin? or is there another place the RPO codes are? sorry if this sounds like a stupid question.

RPO codes are on a sticker in the center glove box or left rear glove box doors.

i went out to the garage and found where there used to be a sticker is there any other way for me to find out if my car is a G92?

It is possible that the build sheet could be in the car. Have to look under the rear seat. Could be under fronts or stuck in behind interior body panels.

Good luck ! ! !

ill strip search the car and call the previous owner. is there any other way to figure RPO out or at least if its a G92?

Why are you curious about the G92?

Most important is the G80, then what gear ratio it has.

G80 is posi right? if so i know for sure my car has one G92 is axle ratio if its not G92 its 2.77 and if its a G92 its 3.27 in the 9bolt the 2.77 had a 2 series carrier and any ratio above 2.77 had a 3 series carrier and i want to put lower gears in my 9bolt and not having to upgrade carrier's would save me over $400 in my quest for lower gears

Should be a tag on the rearend that gives the ratio. Should be mounted using one of the bolts for the rear cover.

ill check that out in the morning

What gear ratio are you wanting? If 3.42:1 it would probably be cheaper to just get a complete "known to be good" rear end with correct gears.

4.11 $330 including shipping if i already have the 3 series carrier (G92)
if i dont have G92 ill probably just get a "known to be good" 3.42 locally

I had 4.11 in my gta for a while, liked the 3.73 much better!

Seemed like a better street gear with the 700R4 auto. I did have a CPT/Art Carr transmission with a 10" 2800 non-lockup converter.

how where the 4.11 with freeway pulls

The 4.11's were great for the 60' times. The 3.73 with the setup I had did better from 60mph + up.

To me the 4.11 seemed to be too low for the highway.

i want killer 0-60 but i also need decent 60-100 should i go like 3.73 or would 3.9 or be better for me? im trying to plan out all the mods i can do in the near future.

The 3.90 vs 4.11, you could not hardly see any differance. The 3.73 vs 4.11 there was little difference performance wise other than rpm 60+ mph.

The main thing is to know how much hp you will be making and at what rpm range it will be making it.

The 700R4 has a low first gear. The problem you will have on the street is getting traction with the lower ratio.

I would ask more people what ratio they use and with what tires. 4.11's will effect you MPG alot!

Wasn't the aluminum driveshaft part of the G92 package?
My 88 Formula had 3.23 gears, posi, and an aluminum driveshaft.

For the most part we can look at Chevrolet and apply it to Pontiac. This is NOT the case when it comes to G92.

G92 was more or less a Camaro option. From 1987 Pontiac retained 4 models, and they were all a little different. The GTA and Formula when equipped with the L98 or with the LB9/M5 should all have the "G92" equipment including the Performance gear, but they will not have the G92 RPO. (note there were some exceptions when talking about exported cars) In 1988 the 1LE Trans Am would have had the G92 option, as would 89 & 90. The 1991 and 1992 Formula and Trans Ams also would have had the G92 option when they were equipped with the G92. The Trans Am had another option for the performance group when paired with the L98 or the LB9/M5 it was something like R6P or something along those lines. Keep in mind that the Pontiac was a step up from the Camaro so they were treated with more options standard.

Since Camaro only had 2 models from 1988 thru 1992 they probably did not want to limit themselves to a single gear ratio, matter of factly the Camaro offered the G92 every year IIRC where I am not sure if the Firebird ever offered it until 1988 when the 1LE became available.

The Aluminum drive shaft was a separate option.

To answer your question, YES YOUR GTA more or less has the G92... well it has the equivalent to it at least.

At 70 Mph you should be reading about 2000 RPM on your Tach. around 1750 would indicate the 2.77, and 2250 indicates a 3.73..


Someone mentioned WS6... WS6 has nothing to do with the performance gear in third Gens AFAIK, at least not from 1987+ WS6 is a suspension package, again, some years the WS6 was actually a step up from the FE2 which was on the IROC, later on the IROC got the 36mm/24mm sway bars, but not the same year as the WS6 Trans Am... Eventually, I would assume to keep costs down, GM combined several things on the cars to be consistent from one line to the other. The later sway bars is a prime example.

John

The G92 was not an option on the GTA. However in '88 the only gear available for the L98 was the 3.27. '87 was the only year that the 2.77 could be in a GTA and not all got the aluminum driveshaft only the L98 cars as John said above.

In '88 6,913 cars got the L98, 6,913 cars got the aluminum driveshaft according to the numbers Frankie has on the GTASourcepage.

Also, don't forget there are a limited number of gears available for the 9 bolt. You might want to do some checking on prices for the gearsets. I know over at http://www.9bolt.com they have some gears availble.

I have 3.70's in my 9 bolt but I also have a 6-speed which at 80mph I'm running 2k on the tach.

thanks i was hopeing it was the 3.27 so i dont have to order the 3 series carrier when changing gear ratios.

I know this is an old thread...but the gear was not a 3.27 but was a 3.45 for M5
GM3 -- Rear Axle Ratio (3.45) -- 809
http://gtasourcepage.com/88RPOFigures.html

Sorry bumping up an old thread but I'm having some kind of confusion. I have all RPO codes for a '89 L98 GTA w/auto trans. and it does have the option:

23: GW6 : AXLE REAR, 3.27 RATIO

which fits with stated at http://gtasourcepage.com/89RPOFigures.html

However I can't keep wondering why http://www.thirdgen.org/1989-pontiac-firebird says the only gear ratios for '89 L98's are 2.77 (w/o G92 opt) or 3.27 (w/ G92 opt).

It's listed that way in the tech data because the chart tries to encompass the Camaro and the Firebird in one chart. The chart shows that the L98 was only available with the 3.27 gear set, don't worry about the qualifiers (G92, optional) since they don't really apply to the year, model, drivetrain, in question. Before some nitwit split up the tech data into individual years, the chart covered from 82-92 all in one nifty reference chart, and some of the things leftover from the old format just don't make a lot of sense now.