3.73 gears - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

MustangKillr · 07-23-2009, 02:33 AM

Hey everyone, I've got yet another question for you guys. I just recently got my RPO code list again after having it gone after my grandpa (initial owner) got hit on the driver's door and had to get a new door (with no RPO sticker). ANYWAY, I checked the code list and I was noticing I have currently have 2.73 ratio gears on my car and I looking to upgrade to 3.73 for my A4. I found a set on eBay, but it looks kind of sketchy, I wanted some of your input. Thanks

!

http://cgi.ebay.com/ebaymotors/ws/eB...=#ht_500wt_955

TFord · 07-23-2009, 08:51 AM

As always, LS1tech will have much more in depth info, but Im sure that you cant just throw in 3.73's because you have a 2 series carrier (ie 2.73), and will need a 3 series carrier. Its been a while since I've did any reading about rear ends. but there are some in depth threads on ls1tech.

shinzon · 07-23-2009, 08:50 PM

x2

01pewterz28 · 07-23-2009, 09:01 PM

Quote:

Originally Posted by MustangKillr

Hey everyone, I've got yet another question for you guys. I just recently got my RPO code list again after having it gone after my grandpa (initial owner) got hit on the driver's door and had to get a new door (with no RPO sticker). ANYWAY, I checked the code list and I was noticing I have currently have 2.73 ratio gears on my car and I looking to upgrade to 3.73 for my A4. I found a set on eBay, but it looks kind of sketchy, I wanted some of your input. Thanks

!

http://cgi.ebay.com/ebaymotors/ws/eB...=#ht_500wt_955

Actually you can add 3.73's to your series 2 carrier you just need to get a set of 3.73 gears that are made for a series 2 carrier.

My 2001 Z/28 had the 2.73's I ordered a set of 3.73's from Summit Racing w/ the proper install kit. All in all I paid around $350 for the gears and install kit plus $300 to have it installed the only thing you will need to do is have the Speedo re-cal.

So far the gears have made a world of difference I found my missed power

Sean

69 Hugger · 07-23-2009, 09:17 PM

Same here I had 2:73s in my 69 and ordered a set of 3:73's from Richmond, but I added a Eaton posi unit also. I'd double check it, How much?

01pewterz28 · 07-24-2009, 03:02 PM

All of my stuff is stock all that was replaced was the gears, and the Motive gear installation kit.

Sean

7CAMARO7 · 07-24-2009, 05:49 PM

Quote:

Originally Posted by 01pewterz28

Actually you can add 3.73's to your series 2 carrier you just need to get a set of 3.73 gears that are made for a series 2 carrier.

that's what I was thinking. since my car is a m6, I know that it is important to make sure to get the correct carrier style for my 4.10s when I get them. They make different carriers for each gear.

What I would do is make sure to get the right carrier style gears, get gm gears, and order a speedo recalibration tune(with upgraded performance tuning) and I'd call it a day.

BunkG · 07-24-2009, 11:24 PM

quick ? what exactly is the point of changing gear ratios? i have a 94 and im looking to add some power as well so is this a good way to go?

7CAMARO7 · 07-25-2009, 12:54 AM

some mods like this will make you faster but not literally add power. Your engine will perform the same as far as hp levels, but it will rev faster because of more leverage against the weight of the car.

a car with a 2.73 will most likely pull kinda soft on the low end of the speedo and pretty damn hard on the top when compared to a 4.10 geared car which will get off the line quicker but will probably not have as high a top speed as the car with the 2.73s

There's always a compromise. Don't get it twisted though, I know guys with 4.10s who can do 150mph easier. I bet past that the pull would slow compared to a 2.73 car, but the 4.10 car would get to about 150 faster. General rule of thumb is 4.10s for ls1 m6 and 3.73 for ls1 a4

Blownhotrodder · 07-25-2009, 01:15 AM

2.73's are pitiful in these cars. I have 3.73's in my 2000 SS m6. They were on the car when I bought it but id say 4.10's would be even better if I was having some installed.

BunkG · 07-25-2009, 01:23 AM

i bought my car used so i dont really know what all has been done to the car so is there any way of knowing what my gear ratios are?

MustangKillr · 07-25-2009, 03:13 AM

Quote:

Originally Posted by 01pewterz28

Actually you can add 3.73's to your series 2 carrier you just need to get a set of 3.73 gears that are made for a series 2 carrier.

My 2001 Z/28 had the 2.73's I ordered a set of 3.73's from Summit Racing w/ the proper install kit. All in all I paid around $350 for the gears and install kit plus $300 to have it installed the only thing you will need to do is have the Speedo re-cal.

So far the gears have made a world of difference I found my missed power

Sean

Can you get me a link

? What you described sounds like it would fit all my needs. The carrier, the gears, and everything.

7CAMARO7 · 07-25-2009, 03:28 AM

Quote:

Originally Posted by Blownhotrodder

2.73's are pitiful in these cars.

from what I hear the stock '02 Corvettes have 2.73s if they're a4. The other day I showed a 2.73 owner how bad his gears sucked before I got home

MustangKillr · 07-25-2009, 03:33 AM

Haha I know what you mean. It never crossed my mind that I should switch out the gears. I was thinking every other mod in the book other than gears lmao. After brakes and tires, my gears are definitely the next thing on my list

.

07-23-2009, 02:33 AM	#1
MustangKillr Drives: 2010 Camaro 2SS Join Date: Sep 2008 Location: Portland, TN Posts: 165 View My Garage	3.73 gears Hey everyone, I've got yet another question for you guys. I just recently got my RPO code list again after having it gone after my grandpa (initial owner) got hit on the driver's door and had to get a new door (with no RPO sticker). ANYWAY, I checked the code list and I was noticing I have currently have 2.73 ratio gears on my car and I looking to upgrade to 3.73 for my A4. I found a set on eBay, but it looks kind of sketchy, I wanted some of your input. Thanks ! http://cgi.ebay.com/ebaymotors/ws/eB...=#ht_500wt_955

07-23-2009, 08:50 PM	#3
shinzon Night Fury Drives: 2014 ZL1 Join Date: Aug 2008 Location: Isle of Birk Posts: 747	x2 __________________ 2014 Black ZL1 - Toothless - Previous Lovers :2014 1LE , 2010 2SS RS,2004 GTO, 2000 Camaro SS x 2

07-24-2009, 03:02 PM	#6
01pewterz28 #TeamBeckyD Drives: 2017 HBM 2SS Convertible A8 Join Date: Aug 2008 Location: Apopka, FL Posts: 10,494 View My Garage	All of my stuff is stock all that was replaced was the gears, and the Motive gear installation kit. Sean __________________ #TeamBeckyD FIFTY HBM 2SS VERT

07-25-2009, 12:54 AM	#9
7CAMARO7 Drives: Slow 4th gen Join Date: Sep 2006 Location: showing you tail lights Posts: 287 View My Garage	some mods like this will make you faster but not literally add power. Your engine will perform the same as far as hp levels, but it will rev faster because of more leverage against the weight of the car. a car with a 2.73 will most likely pull kinda soft on the low end of the speedo and pretty damn hard on the top when compared to a 4.10 geared car which will get off the line quicker but will probably not have as high a top speed as the car with the 2.73s There's always a compromise. Don't get it twisted though, I know guys with 4.10s who can do 150mph easier. I bet past that the pull would slow compared to a 2.73 car, but the 4.10 car would get to about 150 faster. General rule of thumb is 4.10s for ls1 m6 and 3.73 for ls1 a4 __________________

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07-23-2009, 08:51 AM	#2
TFord Camaro Fanatic Drives: 2000 Z28 Join Date: May 2007 Location: Auburn, WA Posts: 1,808 View My Garage	As always, LS1tech will have much more in depth info, but Im sure that you cant just throw in 3.73's because you have a 2 series carrier (ie 2.73), and will need a 3 series carrier. Its been a while since I've did any reading about rear ends. but there are some in depth threads on ls1tech.

07-23-2009, 09:17 PM	#5
69 Hugger Drives: 69 Convertible Camaro Join Date: Sep 2008 Location: Sumit Point, WV Posts: 941 View My Garage	Same here I had 2:73s in my 69 and ordered a set of 3:73's from Richmond, but I added a Eaton posi unit also. I'd double check it, How much?

07-24-2009, 11:24 PM	#8
BunkG Drives: Chevy Camaro Join Date: Sep 2008 Location: Chicago Posts: 78 View My Garage	quick ? what exactly is the point of changing gear ratios? i have a 94 and im looking to add some power as well so is this a good way to go?

07-25-2009, 01:15 AM	#10
Blownhotrodder Drives: 2018 ZL1 1LE Join Date: Dec 2008 Location: Clarkesville , GEORGIA Posts: 1,857	2.73's are pitiful in these cars. I have 3.73's in my 2000 SS m6. They were on the car when I bought it but id say 4.10's would be even better if I was having some installed.

07-25-2009, 01:23 AM	#11
BunkG Drives: Chevy Camaro Join Date: Sep 2008 Location: Chicago Posts: 78 View My Garage	i bought my car used so i dont really know what all has been done to the car so is there any way of knowing what my gear ratios are?

07-25-2009, 03:33 AM	#14
MustangKillr Drives: 2010 Camaro 2SS Join Date: Sep 2008 Location: Portland, TN Posts: 165 View My Garage	Haha I know what you mean. It never crossed my mind that I should switch out the gears. I was thinking every other mod in the book other than gears lmao. After brakes and tires, my gears are definitely the next thing on my list .