The car--'92 Camaro RS 305 TBI.
I'm not sure what gear I have, I think it's around 3.20 ish?
I would jack up the car and rotate the wheels and look at the driveshaft to get a good guess, but my car is so low it's a pain in the a$$ to do that.
So dose anyone know what gear I have?

I want to get a 4.10, what do you guys think about that?
Will it be to hard on the motor while on the interstate?
If so I have no problem getting the 3.73

 

First, the only way to tell what gear you have is to open the cover and count the teeth.

I almost got a 4:10 gearset, but opted for the 3:73 instead and I am very glad I did. I went from a 2:73 to the 3:73 and the difference was night and day. In fact for the stock motor, which peaked at 4500rpm, 3:73 was in my opinion, too much gear. a 3:23 would have done it. But I had other plans and the stock 4500rpm's were not part of it.

 

Thanks for the reply!
I plan on keeping the stock 305 in the car untill it dies.
I really like the 'quick' 4.10 when used with a built trans w/shift kit, which I have, do you think the 3.73 would be better with the stock 305?
Thanks....

 

From the factory it should have came with 3.08 on the manual and 2.73 for the auto. You could check the RPO codes to see if it was ordered with different gears. But in the end the only way to know 100% is to pull the cover and count teeth.

 

How do I check the rpo code?

 

I would go with a 3:42 or a 3:73 if you plan on leaving the 305 stock. 3:73 is nice. Headers and an American Thunder Exhaust system would wake it up with 3:73's.

EDIT: The rpo codes are on the bottom of the lid for your center consol. Look the codes up on this site.

 

Theirs usually a sticker under the lid of the console which will have a whole sh!tload of 3 letter/number combos. Those are the RPO codes. Basically all the options that were put on the car, from paint and trim color to interior detailing.

If you still have the sticker there look for these:

GHO
GH2
GH3
GH4
GK9
GL3
GM1
GM3
GM8
GQ1
GS4
GT4
GT5
GT7
GT8
GU1
GU2
GU4
GU5
GU6
GV2
GV4
GV8
GW4
GW6
GW9
G44
HO4
G72
G75
G80 <--- posi
G92 <--- obviously its the G92 package
HA3
HC4
HC7
HC8
HE3
HF7
HF8
HK9

Those were GMs rear axle ratio RPO codes, if you can find any of those let me know, i can tell you which gears were originally in the car.

 

Thanks bro
I have now---
stock 305
3" no cat with Flowmaster
rebuilt trans with all the goodies
Spohn front/rear sway bars
Spohn lca and panhard bar
Eibach springs
all bushings are Spohn
headers are going in the same time as the gear...

 

I didn't see any sticker, but I did find a set of small bungie<--cords, owners manual and a small pad lock w/a key.
I didn't know they were even there
I never looked in the trunk...............geez

 

another spot for the sticker to be is in the storage compartment in the back

 

I found it, it has GU2............

 

GU2 is the code for 2.73s

 

Thanks bro!
Considering that and my rpm's reading 2 g's at 70 mph I think i'll go with the 3.73 gear.

Thanks again fellas

 

Anybody know what a GQ1 code is? My sticker just says "Rear Axle - Standard"

 

I am guessing that its an open 2.73. But without any other info who knows. The best way to find out for sure is to open it up.

 

DON'T MESS AROUND GUESSING WHAT RATIO YOUR REAR IS BY ASSUMING THAT IT IS STILL STOCK. I DID THIS AND FOUND THAT MY 3:42S HAD BEEN REPLACED BY 3:08S BY SOME PREVIOUS OWNER. MY CAR SAT ON A HOIST FOR A WEEK. WHILE I PAID OVERNIGHT SHIPPING TO GET MY GEAR SET BACK TO THE SUPPLIER, AND PAID OVERNIGHT CHARGES TO GET THE CORRECT GEAR SET TO ME. THE WHOLE TIME MY BOSS IS SCREAMING BECAUSE HE IS LOSING MONEY CAUSE WE CAN'T USE THE HOIST. PULL THE COVER AND COUNT TEETH, ITS WORTH IT.

 

OOPS.

 

I can't remember starting this thread, I guess I was getting deep into the 30 pack when I posted it ................ Oh well.............