Best rear-end for 2010 L99 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

loves_bruins · 06-26-2016, 08:08 PM

Hello,
I'm a noob. My L99 has the stock 3.27 I believe in the rear end. I want to increase HP, so I was thinking of 3.91. But then after reading on this forum the 3.91 is a little heavy on the torque, so I would more thank likely smoke more often that I want. So I was looking at 3.70. I have 22" wheels in the summer. In the winter I use 19" Blizzaks (shoot me now for even running it in the winter). I'm hoping to remedy this by the end of summer with a beater car for the winter so I don't have to use the Camaro.
Anyway, feedback is obviously appreciated.
Your friend for life

flyer08 · 06-26-2016, 08:15 PM

3.91 won't gain you hp, probably decrease in most cases if your just looking for dyno numbers. I just did my 3.91s and even the wife said car is fun to drive now

rontammy0 · 06-26-2016, 11:59 PM

391s are great in the l99....best mod ive done to the car...its gets going in a hurry. They are alot more fun at the track then the stock gears...

hrpiii · 06-27-2016, 06:47 AM

Gear will NOT gain you any hp, period. But it can help you get into your power range a little faster.

pyroguy · 06-27-2016, 08:29 AM

Like others have said, gears will not gain any horsepower, but you will feel the power you have quicker. Contrary to rontammy0 said, many people opt for 3.73 gears in a L99. The primary reason is if you plan on going with major power then you will not blow the tires off the car as regularly with 3.73 as you would with 3.91. That being said, rontammy0 is a person who actually has 3.91 gears in his car so you might put a little more faith in him than me because I'm still running the factory rear end all the way through.

havelegs · 06-27-2016, 10:09 AM

Quote:

Originally Posted by flyer08

3.91 won't gain you hp, probably decrease in most cases if your just looking for dyno numbers. I just did my 3.91s and even the wife said car is fun to drive now

How's it possible to decrease the HP from the rear end gear? Does not compute.

PalmerGA · 06-27-2016, 05:17 PM

Quote:

Originally Posted by loves_bruins

Hello,
I'm a noob. My L99 has the stock 3.27 I believe in the rear end. I want to increase HP, so I was thinking of 3.91. But then after reading on this forum the 3.91 is a little heavy on the torque, so I would more thank likely smoke more often that I want. So I was looking at 3.70. I have 22" wheels in the summer. In the winter I use 19" Blizzaks (shoot me now for even running it in the winter). I'm hoping to remedy this by the end of summer with a beater car for the winter so I don't have to use the Camaro.
Anyway, feedback is obviously appreciated.
Your friend for life

Greeting and welcome to C5! As others have said, gears neither add nor reduce actual "horsepower". They will, however, change the way your car utilizes available HP. Sounds like you just want more acceleration and shift firmness, which changing gears can do.

Go to this thread and read all about gears: http://www.camaro5.com/forums/showthread.php?t=95142

JLBIII · 06-27-2016, 05:28 PM

Had 3.91's in my 2010 L99 since 2011. Lots of fun and more responsive driving on the street. Go for it!

BubbaSS · 06-27-2016, 05:56 PM

Car will feel much torquier...you will also hit higher rpm's while cruising on the highway, hence lower your mpg's...City driving will be better in everyway

SS PANTHER · 06-28-2016, 03:08 AM

LPE AAM 3.70's. Perfect with my supercharger.

JS440 · 08-01-2016, 10:25 PM

Dropped a half second and gained 3 mph on my quarter mile times just by swapping to 3.91s

SynergyGreenSS · 08-01-2016, 10:30 PM

Quote:

Originally Posted by JS440

Dropped a half second and gained 3 mph on my quarter mile times just by swapping to 3.91s

Oh yeah? Well I can one up that. Not only did I drop half a second on my quarter mile times when I switched to 3.91's, but I also dropped a grand on new tires.

flyer08 · 08-01-2016, 10:35 PM

Quote:

Originally Posted by havelegs

How's it possible to decrease the HP from the rear end gear? Does not compute.

http://www.camaro5.com/forums/showthread.php?t=368121 People smarter than me discussing it for 4 pages

06-26-2016, 08:08 PM	#1
loves_bruins Drives: 2010 Camaro SS2 Join Date: Jun 2016 Location: Nashua NH Posts: 36	Best rear-end for 2010 L99 Hello, I'm a noob. My L99 has the stock 3.27 I believe in the rear end. I want to increase HP, so I was thinking of 3.91. But then after reading on this forum the 3.91 is a little heavy on the torque, so I would more thank likely smoke more often that I want. So I was looking at 3.70. I have 22" wheels in the summer. In the winter I use 19" Blizzaks (shoot me now for even running it in the winter). I'm hoping to remedy this by the end of summer with a beater car for the winter so I don't have to use the Camaro. Anyway, feedback is obviously appreciated. Your friend for life

06-27-2016, 08:29 AM	#5
pyroguy Started#gottalovethatblue Drives: ABM #831 Join Date: Apr 2013 Location: TN Posts: 6,919 View My Garage	Like others have said, gears will not gain any horsepower, but you will feel the power you have quicker. Contrary to rontammy0 said, many people opt for 3.73 gears in a L99. The primary reason is if you plan on going with major power then you will not blow the tires off the car as regularly with 3.73 as you would with 3.91. That being said, rontammy0 is a person who actually has 3.91 gears in his car so you might put a little more faith in him than me because I'm still running the factory rear end all the way through. __________________ '10 Camaro 2SS/RS \| Aqua Blue #831 of 3,903 \| Silver Stripes Check out my build thread

06-27-2016, 05:56 PM	#9
BubbaSS WHAT RED LIGHT?! Drives: 2011 Black Camaro 2SS/RS M6 Join Date: Apr 2011 Location: Miami, Florida Posts: 1,115	Car will feel much torquier...you will also hit higher rpm's while cruising on the highway, hence lower your mpg's...City driving will be better in everyway __________________ 2011 2SS/RS M6 BLACK - VARARAM NO TUNE INTAKE, MODDED AND PORTED TB, PORTED INTAKE MANIFOLD, VITESSE THROTTLE CONTROLLER, DOUG THORLEY LT'S, CATLESS, X-PIPE, 25" STAINLESS WORKS RETRO CHAMBERED MUFFLERS, CUSTOM 2.5" MANDREL BENT EXHAUST, RICHMOND 4.10 GEARS, CUSTOM CAM (231/242 @ 114LSA), MUSTANG DYNO TUNED BY TORQ, 20% CERAMIC TINTS, EIBACH PROKIT SPRINGS 1" DROP, HAWK PERFORMANCE CERAMIC BRAKES, NITTO INVO TIRES, HYDROCARBON TAIL LIGHT AND FOG LIGHT BEZELS BY EMBLEMPROS, METRA DASH KIT, JVC KW-AV71BT, PHOENIX GOLD iAMP GM1, PASSPORT QI45 - 450 RWHP 415 RWTQ

06-26-2016, 08:15 PM	#2
flyer08 Account Suspended Drives: 2010 2SS/RS Join Date: Jun 2009 Location: Texas Posts: 3,418	3.91 won't gain you hp, probably decrease in most cases if your just looking for dyno numbers. I just did my 3.91s and even the wife said car is fun to drive now

06-27-2016, 06:47 AM	#4
hrpiii AKA "Beefcake" Drives: 2023 ZL1 Sharkskin Join Date: Oct 2009 Location: Indy Posts: 8,529	Gear will NOT gain you any hp, period. But it can help you get into your power range a little faster.

06-27-2016, 05:28 PM	#8
JLBIII Drives: 2010 RJT 2SS Join Date: Dec 2009 Location: SE Penn. Posts: 175	Had 3.91's in my 2010 L99 since 2011. Lots of fun and more responsive driving on the street. Go for it!

06-28-2016, 03:08 AM	#10
SS PANTHER Drives: 2013 SS Supercharged Convertible Join Date: May 2013 Location: SoCal Posts: 2,714	LPE AAM 3.70's. Perfect with my supercharger.

08-01-2016, 10:25 PM	#11
JS440 Drives: Black 2014 ZL1 m6 coupe Join Date: Nov 2015 Location: Minnesota Posts: 10	Dropped a half second and gained 3 mph on my quarter mile times just by swapping to 3.91s