I believe on his model....373 is stock...

 

3.73 was what I was originally thinkin but wasn't sure.probably what I will go with.thanks for info

 

would leep the 3.73 but dont go over 4.10 gear because it will kill your mpg driving around on the streets. the posi will help on both grabing but i would get limited slip posi.

 

Do you know what gears in it now? is it still stock? or did someone change it before you got it?


If your not sure...check the tab on the rear end..if it doesnt have a "Tab"'

Jack the rear wheels off the ground, and turn the tire 1 revolution, and count how many time the drive shaft spins around...That should give you a close idea what gears in it now.... Example: 3 and 3/4 revolutions(drive shaft) would equal a 3:73 gear....
Good luck Hope this helps!

 

Your car would have came stock with one of 2 different gear sets either the 2.41 or 2.73

it is likely that it was the 2.41 becuase the 2.73 gearset only came in the the rpo NA6 which was a high altitude option

i personally would go with a 3.89 gear set so it's no slouch at the track yet still very streetable

also i would look for a 12 bolt from an a body, bolt in and go!

 

http://gmheritagecenter.com/docs/gm-...onte-Carlo.pdf

here is a link to a vast amount of information on your car,

 

Nice Find Bud!
That doc should be a big help!

That certainly clears up everything and anything else that maybe problematic as well in the future for him!

Well Done!

 

i forgot who posted it some time ago i have just kept it in the back of my mind because it is a very nice reference tool,

i actually printed off both pdf's for my 85 and my 01..


They have a ton of years and models on thier site!

here is a link to the site

Vehicle Information Kits - GM Heritage Center

 

Thanks Bud!
Lots of great info on mine as well!
The address they give this info from is also the address in warren where I ordered and bought mine from...aka
Ed Rinke Chevrolet!

 

Remember tire size affects your final rear gear ratio as well.

Rob@dixiemontecarlodepot