Swappin' Gears - Page 17 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

frankwjr · 09-13-2017, 11:38 PM

I would sell you my 3.45's..there gonna come out soon for 3.91's!

briancamaross · 09-14-2017, 07:27 AM

Just do 3.91 bust choice I did and I have a 26.98 tire size . Puts my car at a 4.15 ratio.

acammer · 09-14-2017, 09:09 AM

Quote:

Originally Posted by frankwjr

I would sell you my 3.45's..there gonna come out soon for 3.91's!

You're gonna love the change!

frankwjr · 09-14-2017, 09:59 AM

too right...started a thread in the trans section..gonna doc the process with some pics...

sehovarter · 05-26-2022, 01:37 PM

OK - this is a VERY long and informative thread, and I am considering upgrading my rear end in my 2014 SS L99. I don't think I say anyone show the % gains going from the 3.27 to the AAM 3.70s. I live in Golden CO, so altitude has stolen the "quick" I had at sea level, so considering a gear swap and corresponding upgrade to my Janetty tune to accommodate - looking at 3.91s clearly a little less torque increase.....? anyone??

sehovarter · 05-26-2022, 01:39 PM

Actuallly - perhaps this is good enough - 3.70's close to the 3.73 info from Page 1 reposted here
By upgrading the factory 3.27s in the stock A6 equipped Camaro SS to the 3.73s you will realize an equivalent torque gain of approximately 15% or 61.5 lb.-ft. of torque and cruise at 2050 RPM at 70 MPH. By upgrading the factory 3.27s in the stock A6 equipped Camaro SS to the 3.91s you will realize an equivalent torque gain of approximately 20% or 82 lb.-ft. of torque and cruise at 2150 RPM at 70 MPH. By upgrading the A6 to the 4.11s you will realize an equivalent torque gain of approximately 27% or 110.7 lb.-ft. of torque and cruise at 2250 RPM at 70 MPH. By upgrading the A6 to the 4.33s you will realize an equivalent torque gain of approximately 33% or 135.3 lb.-ft. of torque and cruise at 2377 RPM at 70 MPH. The A6 transmission is geared more aggressively than the M6 SS so we have found that 3.73 is a great gear for most A6 equipped SS applications.

sehovarter · 05-26-2022, 01:40 PM

Ligenfelter no longer sells their 3.71 gears (made by AAM) I believe...checkign with my local axle/differential shop.....

acammer · 05-27-2022, 12:14 PM

Quote:

Originally Posted by sehovarter

OK - this is a VERY long and informative thread, and I am considering upgrading my rear end in my 2014 SS L99. I don't think I say anyone show the % gains going from the 3.27 to the AAM 3.70s. I live in Golden CO, so altitude has stolen the "quick" I had at sea level, so considering a gear swap and corresponding upgrade to my Janetty tune to accommodate - looking at 3.91s clearly a little less torque increase.....? anyone??

Unless you've got a power adder, there really is no good argument (other than fuel economy) for anything less than a 3.91 gear ratio in a 6L80 5th gen Camaro. It's the way to go, without a doubt. I've got a good read on it with some good data for you to take a look at:

https://gwatneyperformance.com/geari...utomatic-cars/

morepowerjoe · 06-04-2022, 12:04 AM

So I was looking at a calculator for gear ratio to mph. And I put in my stock numbers and things didn't add up. I currently have the transmission shifting at 6400 rpm in first to second at 30 mph and when I'm cruising at 70 mph it is at approximately at 2100 rpm. My question is, does this sound like 3.91's to you guys?

dreksnot · 06-04-2022, 12:43 AM

Looks like it
.
.

morepowerjoe · 06-04-2022, 12:46 AM

Cool man! I guess the owner before me gave me a gift!

morepowerjoe · 06-05-2022, 01:50 AM

I was wondering what all needs to be changed in the tune for 3.91's. I see under the speedo tab it has a gear ratio and tire size. Should I change it from 3.27 to 3.91? Also is there anything else that needs to be changed?

dreksnot · 06-05-2022, 10:12 AM

Quote:

Originally Posted by morepowerjoe

I was wondering what all needs to be changed in the tune for 3.91's. I see under the speedo tab it has a gear ratio and tire size. Should I change it from 3.27 to 3.91? Also is there anything else that needs to be changed?

That’s it!

wastepile · 07-28-2022, 11:21 PM

I'm considering putting 3.91 gears on my 2010 SS M6. Will the SS handle thus change with everything else stock, or are there other parts I should change to handle the additional torque? Thanks

09-13-2017, 11:38 PM	#225
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,445	I would sell you my 3.45's..there gonna come out soon for 3.91's! __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

09-14-2017, 07:27 AM	#226
briancamaross Drives: 2011 ss 2ss auto camaro Join Date: Mar 2015 Location: mary esther florida Posts: 385 View My Garage	Just do 3.91 bust choice I did and I have a 26.98 tire size . Puts my car at a 4.15 ratio. __________________ 2011 2ss white Camaro mods are texas speed stage 4 cam 235/239 Texas speed 2inch headers no cats magna flow bullet mufflers gpi rod mod ,circle d 4000-4200 5c stall. 3.91 gears vararm cai power wedge.

09-14-2017, 09:59 AM	#228
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,445	too right...started a thread in the trans section..gonna doc the process with some pics... __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...

05-26-2022, 01:37 PM	#229
sehovarter HomezSS Drives: 2014 SS/RS Camaro, 2011 Silverado Join Date: Jul 2014 Location: Golden, CO Posts: 96	OK - this is a VERY long and informative thread, and I am considering upgrading my rear end in my 2014 SS L99. I don't think I say anyone show the % gains going from the 3.27 to the AAM 3.70s. I live in Golden CO, so altitude has stolen the "quick" I had at sea level, so considering a gear swap and corresponding upgrade to my Janetty tune to accommodate - looking at 3.91s clearly a little less torque increase.....? anyone?? __________________ HOMEZSS 2014 SS/RS, FR Style 41's, 20x10x4, Borla CatBack with Touring Mufflers w/Magnaflow Glasspacks, Cold Air Inductions Intake, Diablo 91 Octane Tune, Firm Shift, AFM off, BMR cradle inserts, trailing arms and toe links, 1LE/ZL1 Rear Sway Bar, Jannetty Custom Tune for mods noted above (noticable change to how the car drives!!), JL Audio XD700/5 amp and 10 inch Sub, Focal PS 165K's, special wiring kit and amp board, and lots of dynamat (Amazon version) - Sounds GREAT, Runs Even Better!

05-26-2022, 01:39 PM	#230
sehovarter HomezSS Drives: 2014 SS/RS Camaro, 2011 Silverado Join Date: Jul 2014 Location: Golden, CO Posts: 96	Actuallly - perhaps this is good enough - 3.70's close to the 3.73 info from Page 1 reposted here By upgrading the factory 3.27s in the stock A6 equipped Camaro SS to the 3.73s you will realize an equivalent torque gain of approximately 15% or 61.5 lb.-ft. of torque and cruise at 2050 RPM at 70 MPH. By upgrading the factory 3.27s in the stock A6 equipped Camaro SS to the 3.91s you will realize an equivalent torque gain of approximately 20% or 82 lb.-ft. of torque and cruise at 2150 RPM at 70 MPH. By upgrading the A6 to the 4.11s you will realize an equivalent torque gain of approximately 27% or 110.7 lb.-ft. of torque and cruise at 2250 RPM at 70 MPH. By upgrading the A6 to the 4.33s you will realize an equivalent torque gain of approximately 33% or 135.3 lb.-ft. of torque and cruise at 2377 RPM at 70 MPH. The A6 transmission is geared more aggressively than the M6 SS so we have found that 3.73 is a great gear for most A6 equipped SS applications. __________________ HOMEZSS 2014 SS/RS, FR Style 41's, 20x10x4, Borla CatBack with Touring Mufflers w/Magnaflow Glasspacks, Cold Air Inductions Intake, Diablo 91 Octane Tune, Firm Shift, AFM off, BMR cradle inserts, trailing arms and toe links, 1LE/ZL1 Rear Sway Bar, Jannetty Custom Tune for mods noted above (noticable change to how the car drives!!), JL Audio XD700/5 amp and 10 inch Sub, Focal PS 165K's, special wiring kit and amp board, and lots of dynamat (Amazon version) - Sounds GREAT, Runs Even Better!

05-26-2022, 01:40 PM	#231
sehovarter HomezSS Drives: 2014 SS/RS Camaro, 2011 Silverado Join Date: Jul 2014 Location: Golden, CO Posts: 96	Ligenfelter no longer sells their 3.71 gears (made by AAM) I believe...checkign with my local axle/differential shop..... __________________ HOMEZSS 2014 SS/RS, FR Style 41's, 20x10x4, Borla CatBack with Touring Mufflers w/Magnaflow Glasspacks, Cold Air Inductions Intake, Diablo 91 Octane Tune, Firm Shift, AFM off, BMR cradle inserts, trailing arms and toe links, 1LE/ZL1 Rear Sway Bar, Jannetty Custom Tune for mods noted above (noticable change to how the car drives!!), JL Audio XD700/5 amp and 10 inch Sub, Focal PS 165K's, special wiring kit and amp board, and lots of dynamat (Amazon version) - Sounds GREAT, Runs Even Better!

06-04-2022, 12:04 AM	#233
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,232	So I was looking at a calculator for gear ratio to mph. And I put in my stock numbers and things didn't add up. I currently have the transmission shifting at 6400 rpm in first to second at 30 mph and when I'm cruising at 70 mph it is at approximately at 2100 rpm. My question is, does this sound like 3.91's to you guys? __________________ DSS Pistons, Eagle ESP L19 Rods, ARP Head and Main Studs, TSP PRC CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Racing Lifters, CHE Trunnions, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP Longtubes, ZL1 Fuel Pump, Mishimoto Radiator and Oil Cooler, 3600 Circle D Converter, Tru Cool 40k Tranny Cooler, Fluid Dynamics Balancer, EBC 3GD Rotors with EBC Bluestuff NDX Pads, Bilstein B6 Shocks / Struts with Eibach ZL1 Drop Springs Build Thread https://www.camaro5.com/forums/showthread.php?t=609817

06-04-2022, 12:43 AM	#234
dreksnot Served USN - Atomic Chimp Drives: 2021 Camaro ZL1 1LE A10 (stock) Join Date: Jul 2012 Location: Fort Collins, CO Posts: 1,709 View My Garage	Looks like it . . Attached Images __________________ > > 2021 Camaro ZL1 1LE A10 > > Past Builds: 2013 Twin-Turbo LSX434 M6 - 1,359rwhp daily

06-04-2022, 12:46 AM	#235
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,232	Cool man! I guess the owner before me gave me a gift! __________________ DSS Pistons, Eagle ESP L19 Rods, ARP Head and Main Studs, TSP PRC CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Racing Lifters, CHE Trunnions, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP Longtubes, ZL1 Fuel Pump, Mishimoto Radiator and Oil Cooler, 3600 Circle D Converter, Tru Cool 40k Tranny Cooler, Fluid Dynamics Balancer, EBC 3GD Rotors with EBC Bluestuff NDX Pads, Bilstein B6 Shocks / Struts with Eibach ZL1 Drop Springs Build Thread https://www.camaro5.com/forums/showthread.php?t=609817

06-05-2022, 01:50 AM	#236
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,232	I was wondering what all needs to be changed in the tune for 3.91's. I see under the speedo tab it has a gear ratio and tire size. Should I change it from 3.27 to 3.91? Also is there anything else that needs to be changed? __________________ DSS Pistons, Eagle ESP L19 Rods, ARP Head and Main Studs, TSP PRC CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Racing Lifters, CHE Trunnions, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP Longtubes, ZL1 Fuel Pump, Mishimoto Radiator and Oil Cooler, 3600 Circle D Converter, Tru Cool 40k Tranny Cooler, Fluid Dynamics Balancer, EBC 3GD Rotors with EBC Bluestuff NDX Pads, Bilstein B6 Shocks / Struts with Eibach ZL1 Drop Springs Build Thread https://www.camaro5.com/forums/showthread.php?t=609817

07-28-2022, 11:21 PM	#238
wastepile Drives: 2010 ABM Camaro SS M6 Join Date: Jul 2020 Location: USA Posts: 90	I'm considering putting 3.91 gears on my 2010 SS M6. Will the SS handle thus change with everything else stock, or are there other parts I should change to handle the additional torque? Thanks