Swappin' Gears - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

IneedAZ · 08-20-2013, 10:42 AM

Quote:

Originally Posted by msp2887

Needed to do a gear swap? Were there issues w/ the 3.73s?

Its a lOOOOOOOng story, but due to a defect the gears developed a whine and need to be replaced and the shop thats doing the work only had 3.91's in stock and i need it replaced like yesterday as a secondary issue developed and i have a grinding when making turns. At least now i can make a comparison between the two cause like many i had a hard time deciding when i bought the 3.73's.

10 2SS/RS 6M · 08-20-2013, 01:25 PM

I've been installing rear end gears for 20 years, the most pain in the but rear end to set up (The first time) was the 3rd gen Camaro due to it's small 7 5/8'' ring gear, which makes the pinion very small and prone to breaking with 4.10's, weakest rear they made I think, they have to be set up perfect. I think that was one of the weakest rear ends they used, but they were making less then 200HP! I used Richmond gears, back then it only cost $200 for the gears and less then $100 for the installation kit, man has prices increased! Now $700 for gears for the 5th gen?!

Sorry to jack the thread (in a way) but it is very detailed and well explained information you provided, Thank you.

Ishin · 08-20-2013, 10:30 PM

thanks Chase, this was educational. I had always wondered about how the rear end gears worked.

Apex Motorsports · 08-21-2013, 07:37 AM

Quote:

Originally Posted by RacnJsn95

Nice write up!

Quote:

Originally Posted by hunterv6

Great info

Quote:

Originally Posted by Ishin

thanks Chase, this was educational. I had always wondered about how the rear end gears worked.

Thanks! Glad you guys found it helpful.

blazzin1 · 08-21-2013, 08:16 AM

Quote:

Originally Posted by 10 2SS/RS 6M

I used Richmond gears, back then it only cost $200 for the gears and less then $100 for the installation kit, man has prices increased! Now $700 for gears for the 5th gen?!

3.91's (P/N 22813040) are $250 from most dealerships. But yes, other aftermarket gears (i.e. Richmond, Yukon, etc.) are typically around $500 or more depending on where you're shopping.

HypnotiqSS · 08-25-2013, 01:32 PM

do the torque gains from the swap show up on the dyno?

fldrummer · 08-25-2013, 01:50 PM

Quote:

Originally Posted by HypnotiqSS

do the torque gains from the swap show up on the dyno?

No, unfortunately, but they do in the butt dyno.

Apex Motorsports · 08-25-2013, 02:41 PM

Quote:

Originally Posted by HypnotiqSS

do the torque gains from the swap show up on the dyno?

Quote:

Originally Posted by fldrummer

No, unfortunately, but they do in the butt dyno.

Correct. Gears do not cause the creation of more power. They improve performance by taking what is already being made to better use. You will not get better dyno numbers, but you will get better numbers at the track.

redirish · 08-25-2013, 06:35 PM

I would like to see more information and a comparison of the 3:90 and the 4:11's for both the M6 and A6

IOM Black Diamond · 08-26-2013, 12:04 AM

Thank you for the info.

Apex Motorsports · 09-05-2013, 07:06 AM

Quote:

Originally Posted by redirish

I would like to see more information and a comparison of the 3:90 and the 4:11's for both the M6 and A6

I will run the numbers and get them added.

Quote:

Originally Posted by IOM Black Diamond

Thank you for the info.

You are very welcome.

10 2SS/RS 6M · 09-07-2013, 09:21 PM

Quote:

Originally Posted by blazzin1

3.91's (P/N 22813040) are $250 from most dealerships. But yes, other aftermarket gears (i.e. Richmond, Yukon, etc.) are typically around $500 or more depending on where you're shopping.

I may even try the 3.91's too, should still be a strong gear, we'll see what the future holds. Thanks for the info.

Ron66Vette&10SS · 09-08-2013, 03:54 PM

.... a 13% torque increase in the LS3 (manual)
and 20% torque increase in the L99 (automatic)

when using the stock engine specs, the math works out to:

LS3: +54.6 lbstq (420lbs stock)
L99: +82 lbstq (410lbs stock)

JMAC2011 · 09-08-2013, 08:24 PM

Why the 4.11 over the 3.91 in an m6 SS. I just put 3.91s in and now you've got me questioning the 4.11 set. My Car is making 447rwtq and I use it mostly for track days. The 3.91s feel very good...don't have track experience yet with these gears, but I'm strongly considering buying a 19" wheel and tire setup that will have an overall tire diameter in the 26 inch range.

08-20-2013, 01:25 PM	#16
10 2SS/RS 6M Drives: 2013 Camaro ZL1 bone stock 9K miles Join Date: Oct 2010 Location: Philadelphia, PA Posts: 389 View My Garage	I've been installing rear end gears for 20 years, the most pain in the but rear end to set up (The first time) was the 3rd gen Camaro due to it's small 7 5/8'' ring gear, which makes the pinion very small and prone to breaking with 4.10's, weakest rear they made I think, they have to be set up perfect. I think that was one of the weakest rear ends they used, but they were making less then 200HP! I used Richmond gears, back then it only cost $200 for the gears and less then $100 for the installation kit, man has prices increased! Now $700 for gears for the 5th gen?! Sorry to jack the thread (in a way) but it is very detailed and well explained information you provided, Thank you. __________________ SLP- long tube headers, hi flow cats w/full SLP 3'' PowerFlo exhaust incl/X-pipe, 160 degree stat, SLP Blackwing CAI. Dyno tuned by ECS-407/409RWHP&TQ. BMR- trailing arms w/poly knuckle bushings, toe links, cradle bushings and differential bushings. QA1 rear lower control arms. Hurst short throw shifter, SS- level 4 axles, DSS- aluminum driveshaft, Pfadt- sport 1.5" rear sway-bar. SPOHN 1.25" front sway-bar. Monster LT1-S twin clutch. Prothane motor mounts. Best 1/4 mile so far- 12:70ET @ 112.24 MPH w/ 2.06 second 60'. SOLD. Last edited by 10 2SS/RS 6M; 09-07-2013 at 09:17 PM.

08-26-2013, 12:04 AM	#24
IOM Black Diamond HT5 COTW 1/21/13 Drives: 2010 Camaro Inferno 2SS RS 6M Join Date: Apr 2011 Location: Pleasant Hill, Or Posts: 2,486	Thank you for the info. __________________

09-08-2013, 03:54 PM	#27
Ron66Vette&10SS Plays with Hot Wheels Drives: '17 Jet Black ZL1 Join Date: Apr 2010 Location: Derby, Kansas Posts: 849	According to GM Fuel page, 3.91's give... .... a 13% torque increase in the LS3 (manual) and 20% torque increase in the L99 (automatic) when using the stock engine specs, the math works out to: LS3: +54.6 lbstq (420lbs stock) L99: +82 lbstq (410lbs stock) __________________ Previous Cars: '78 Z28, '92 Z28, '95 Z28, '85 Corvette, '01 SS, '96 Z28, '04 Z06 Corvette, '10 SS, '13 SS Hot Wheels Current Cars: '17 ZL1(daily driver), '04 Trailblazer (rain & snow), '66 Corvette (restoring)

09-08-2013, 08:24 PM	#28
JMAC2011 MONGOOSE Drives: 2011 SS Camaro M6 Join Date: Sep 2010 Location: Buford, GA Posts: 178	Why the 4.11 over the 3.91 in an m6 SS. I just put 3.91s in and now you've got me questioning the 4.11 set. My Car is making 447rwtq and I use it mostly for track days. The 3.91s feel very good...don't have track experience yet with these gears, but I'm strongly considering buying a 19" wheel and tire setup that will have an overall tire diameter in the 26 inch range. __________________ _________________________________ MODS: 470 RWHP / 447 RWTQ Lethal Racing Night Fury 231/242 113-111, C5R chain, dbl springs, Comp pushrods. ARH 1-7/8" Headers and complete exhaust - NO cats! Varraram CAI - Vmax throttle body, ATI 10% underdrive pulley RPS Street Twin - MGW Shifter 3.91 gears + DSS 1000hp axles PFADT - Stage 4 Camaro Road Racing Kit - 8" springs 325# and 600# - ZL Spec Sway bars - Strut Tower Brace - Camber plates. CTSV front calipers - Hawk DTC 30 pads Street: Forgestar F14 20x9 and 20x11, 275/315 Nitto Invo's, Track: TOYO R888 285/35/20 on 4 corners

08-20-2013, 10:30 PM	#17
Ishin Drives: 2012 Camaro 1LT RS Join Date: Oct 2012 Location: Atlanta Ga Posts: 205	thanks Chase, this was educational. I had always wondered about how the rear end gears worked.

08-25-2013, 01:32 PM	#20
HypnotiqSS Drives: 2010 camaro 1ss Join Date: Apr 2013 Location: sunbury, OH Posts: 148 View My Garage	do the torque gains from the swap show up on the dyno?

08-25-2013, 06:35 PM	#23
redirish Drives: 10' IOM 2SS/RS/M6 Join Date: Sep 2009 Location: New Jersey Posts: 1,354 View My Garage	I would like to see more information and a comparison of the 3:90 and the 4:11's for both the M6 and A6