3:91 Gears. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Steves ss · 05-18-2020, 01:44 PM

Thoughts on upgrading to this gear set. Did any one do this, and if so is it a good performance upgrade? What’s drivability like? I have the 2010 Camaro SS with the L99. Thanks.

frankwjr · 05-18-2020, 02:57 PM

tons of threads on this...for me one of the best upgrades I did and I'm manual...don't forget gonna need a tune to correct the speedo..get a SCT/tune deal from dynoSteve at RDP...kill 2 birds with 1 stone.

Good luck!

PEACE

chrish70 · 05-18-2020, 10:41 PM

Quote:

Originally Posted by frankwjr

tons of threads on this...for me one of the best upgrades I did and I'm manual...don't forget gonna need a tune to correct the speedo..get a SCT/tune deal from dynoSteve at RDP...kill 2 birds with 1 stone.

Good luck!

PEACE

Modernmusclecar · 05-20-2020, 10:27 AM

Quote:

Originally Posted by Steves ss

Thoughts on upgrading to this gear set. Did any one do this, and if so is it a good performance upgrade? What’s drivability like? I have the 2010 Camaro SS with the L99. Thanks.

I did this 3 years ago. Great upgrade and driveabilty if great. Right at 2100 rpm at 70 mph.

06blownSS · 06-17-2020, 06:51 PM

Quote:

Originally Posted by Steves ss

Thoughts on upgrading to this gear set. Did any one do this, and if so is it a good performance upgrade? What’s drivability like? I have the 2010 Camaro SS with the L99. Thanks.

I took the drivetrain off a ZL-1 so I am running 3.73 in the rear and I love it. I would say depends how much power you plan on running, if you stay roughly stock 3.91s would be fun as hell. Higher hp levels peace of mind in a ZL1 diff and a more useable 1st gear was my choice. Do the gears you will not regret.

DINGO · 06-19-2020, 10:55 AM

Hi Steve
I put in the 1LE 3.91 and I love them. My car has a mild cam, the gears made a big difference.
If your planning on forced induction, then I would stay stock gears.
I am in Brampton also, hope to see you out on the roads.

acammer · 06-19-2020, 12:17 PM

Gears are definitely one of the best things you can do for these cars. They are heavy, and really come alive when give them some mechanical advantage.

We do carry the 3.91 (and 4.11) ratios on our website. If you have any questions, feel free to reach out.

https://gwatneyperformance.com/produ...gn=391scamaro5

Steves ss · 06-19-2020, 07:22 PM

Thanks. I plan on staying N/A. Hey Dingo where did you get your gears done?

Modernmusclecar · 06-19-2020, 08:59 PM

Quote:

Originally Posted by Steves ss

Thanks. I plan on staying N/A. Hey Dingo where did you get your gears done?

SpI near Hamilton did mine. They deal with a shop that specializes in drive lines. They install the gears in a diff at their shop and keep them in stock. Spi just called and had one delivered while shipping mine back to them. Drove right from there to the drag strip. That was 3 years ago.

Steves ss · 06-19-2020, 09:00 PM

So, this is what I have now, long tubes, x pipe, cat back system, cold air intake, 160 degrees thermostat, and a tune. Had this work done about 4 years back. When I drive in tap shift mode the car really moves and 1st gear is really short. How will the 3:91 gears make a difference when driving the car, or when I modify the car further do I need them for supporting my upgraded mods?

DINGO · 06-20-2020, 09:50 AM

SPI
354 MacNab Street
Dundas, ON
L9H 2L2

sales@2020speedshop.com
tel:1-289-238-9471

also consider doing new bushings, while the unit is out of the car.
I've been bring my Camaro to them for 10 years now.

Steves ss · 06-20-2020, 11:49 AM

Thanks Dingo. I started to email a few shops and that was one of them. I was told they were going to send me an estimate.

sean_reaves33 · 12-28-2021, 11:56 PM

I have a 2011 camaro ss modded : i have 3:91 gears on a upgraded transmission that handles 1000 hp. Got the 2.9 whipple wit the nick Williams 102 boosted TB, makes a difference. headers, cat delete and auxiliary pump which handles 1000hp.
Now CHVYMAC mustang dyno 840 rwhp. It's pretty fast but when i get past 160mph it blows out a lil water while running 170+ and it still be pulling. Tring to figure if the gears are to low to be doing pulls at 150mph? Now if i just press the gas and get to 170mph no problem, but if i do a pull from 150mph then a lil smoke come from underneath the car. Once i slow down smoke stops. Then everything seals back up. No leaks nothing. Therefore i can do pulls up to 160mph no problem. Or do you think its a tunning error? Or engine compression issue. Maybe a bigger cam? Appreciated your feed back..

Sent from my SM-G965U using Tapatalk

Steves ss · 12-29-2021, 01:20 PM

Hey Sean. Nice car. Like your set up. I’m not sure about your situation. Sorry bud. What wheels and tire setup do you have?

05-18-2020, 01:44 PM	#1
Steves ss Drives: 2010 Camaro SS/RS Black Join Date: Aug 2011 Location: Brampton, Ontario Posts: 43	3:91 Gears. Thoughts on upgrading to this gear set. Did any one do this, and if so is it a good performance upgrade? What’s drivability like? I have the 2010 Camaro SS with the L99. Thanks.

05-18-2020, 02:57 PM	#2
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,446	tons of threads on this...for me one of the best upgrades I did and I'm manual...don't forget gonna need a tune to correct the speedo..get a SCT/tune deal from dynoSteve at RDP...kill 2 birds with 1 stone. Good luck! PEACE __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

06-19-2020, 12:17 PM	#7
acammer GPI Sales Consultant Drives: 2011 Camaro 2SS SGM Join Date: Jul 2016 Location: Weedsport, NY Posts: 2,794 View My Garage	Gears are definitely one of the best things you can do for these cars. They are heavy, and really come alive when give them some mechanical advantage. We do carry the 3.91 (and 4.11) ratios on our website. If you have any questions, feel free to reach out. https://gwatneyperformance.com/produ...gn=391scamaro5 __________________ GPI Max Package 2.0: Brodix BR7 heads/GPI porting, MAX3 cam, ST2116LSR, BSR Max Lift rockers, LS7 LSXR with 103mm TB, Vararam OTR, Mcleod RXT, G-Force/Strange 9" IRS setup with 4.63 gear. 551whp, 11.1@124mph. *Got a question about a GPI product? Feel free to shoot me a message!*

06-19-2020, 10:55 AM	#6
DINGO Drives: 2010 CGM 2SS/RS M6 Join Date: Feb 2010 Location: Brampton, Ontario. Canada Posts: 398	Hi Steve I put in the 1LE 3.91 and I love them. My car has a mild cam, the gears made a big difference. If your planning on forced induction, then I would stay stock gears. I am in Brampton also, hope to see you out on the roads.

06-19-2020, 07:22 PM	#8
Steves ss Drives: 2010 Camaro SS/RS Black Join Date: Aug 2011 Location: Brampton, Ontario Posts: 43	Thanks. I plan on staying N/A. Hey Dingo where did you get your gears done?

06-19-2020, 09:00 PM	#10
Steves ss Drives: 2010 Camaro SS/RS Black Join Date: Aug 2011 Location: Brampton, Ontario Posts: 43	So, this is what I have now, long tubes, x pipe, cat back system, cold air intake, 160 degrees thermostat, and a tune. Had this work done about 4 years back. When I drive in tap shift mode the car really moves and 1st gear is really short. How will the 3:91 gears make a difference when driving the car, or when I modify the car further do I need them for supporting my upgraded mods?

06-20-2020, 09:50 AM	#11
DINGO Drives: 2010 CGM 2SS/RS M6 Join Date: Feb 2010 Location: Brampton, Ontario. Canada Posts: 398	SPI 354 MacNab Street Dundas, ON L9H 2L2 sales@2020speedshop.com tel:1-289-238-9471 also consider doing new bushings, while the unit is out of the car. I've been bring my Camaro to them for 10 years now.

06-20-2020, 11:49 AM	#12
Steves ss Drives: 2010 Camaro SS/RS Black Join Date: Aug 2011 Location: Brampton, Ontario Posts: 43	Thanks Dingo. I started to email a few shops and that was one of them. I was told they were going to send me an estimate.

12-28-2021, 11:56 PM	#13
sean_reaves33 Drives: 2011 camero ss Join Date: Dec 2018 Location: US Posts: 11	I have a 2011 camaro ss modded : i have 3:91 gears on a upgraded transmission that handles 1000 hp. Got the 2.9 whipple wit the nick Williams 102 boosted TB, makes a difference. headers, cat delete and auxiliary pump which handles 1000hp. Now CHVYMAC mustang dyno 840 rwhp. It's pretty fast but when i get past 160mph it blows out a lil water while running 170+ and it still be pulling. Tring to figure if the gears are to low to be doing pulls at 150mph? Now if i just press the gas and get to 170mph no problem, but if i do a pull from 150mph then a lil smoke come from underneath the car. Once i slow down smoke stops. Then everything seals back up. No leaks nothing. Therefore i can do pulls up to 160mph no problem. Or do you think its a tunning error? Or engine compression issue. Maybe a bigger cam? Appreciated your feed back.. Sent from my SM-G965U using Tapatalk

12-29-2021, 01:20 PM	#14
Steves ss Drives: 2010 Camaro SS/RS Black Join Date: Aug 2011 Location: Brampton, Ontario Posts: 43	Hey Sean. Nice car. Like your set up. I’m not sure about your situation. Sorry bud. What wheels and tire setup do you have?