add 3.91 gears in my camaro L99 - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

bhillakaiceberg · 06-06-2013, 09:09 AM

Im thinking about doing 3.70 Gears as well.

Baltimorejohn1 · 06-08-2013, 07:10 PM

This lower (higher numerically) ratio rear drive gear will increase effective rear wheel torque multiplication in 2010 - 2013 SS Camaros by 13% (over standard 3.45 ratio) in a manual tansmission-equipped car, and 20% (over standard 3.27) in an automatic-equipped car. This gearset is the original equipment ratio found in the 1LE 2013 Camaro package.

NOTE: This change will affect the indicated vehicle speed. Recalibration is required for accurate speedometer reading.

https://theblock.com/sema12/part/6

Baltimorejohn1 · 06-08-2013, 07:13 PM

Quote:

Originally Posted by M.D.P84

thank you very much, loved the videos

You're more than welcome

ramiloutfi · 07-25-2013, 11:27 AM

I'm using 3.91 gears with all the below mods and Nitto NT05 tires 315 / 35 rear. No issues at all

Pro Stock John · 07-26-2013, 10:00 PM

Quote:

Originally Posted by M.D.P84

hello friends, well I wanted to know what the advantages of having 3.91 gears. good in terms of launching from 0 to 60mph, and that changes in top speed? gains some wrhp?? can help me to clarify these doubts??

3.91 gears will increase torque multiplication across all gears. Or in laymans terms, your engine will spin faster in the same amount of time as it would with the stock 3.27 gears. I think that the car will be hard to hook in 1st gear, maybe half of second, just my speculation. Now you'd hit top speed quicker because your engine will RPM quicker.

You shouldn't see an increase in RWHP, in fact those gears will eat up a little HP.

IMO the gears would be fun from a roll.

axis · 07-26-2013, 11:14 PM

They would have zero affect on your top speed. Our cars have the gears to go over 250mph. We just don't have the HP or aero to get there. They would affect your cruise rpm, thus MPG. By how much, I don't know.

Rickh · 03-11-2015, 05:12 PM

I too am considering 3:70 gears for my A6.

Once installed, won't the upshift and downshift MPH speeds in each gear be effected? Meaning, a custom tuner would need to adjust the MPH in at least 1-4 and downshifts in each gear too? My assumption is yes.

Mr_Draco · 03-11-2015, 06:23 PM

Quote:

Originally Posted by Rickh

I too am considering 3:70 gears for my A6.

Once installed, won't the upshift and downshift MPH speeds in each gear be effected? Meaning, a custom tuner would need to adjust the MPH in at least 1-4 and downshifts in each gear too? My assumption is yes.

Yes. For the auto, the car will need to be tuned and have the shift points adjusted for all gears

Rickh · 03-11-2015, 06:46 PM

Ok. Sounds like mostly WOT road testing, tuner and I after gears installed.

Seems with the A6 upshifts/downshifts controlled by MPH, utilizing HP Tuners programming. We did the same on previous tunes, and with gears will need to re-adjustments again.

Hopeful I could find someone within my area, Orange County with an A6 whom has swapped out gears, see how the car responds afterwards.

Pro Stock John · 03-11-2015, 07:22 PM

I did 3.91's in my L99. And the car is funnerer from a dig and from a roll.

Rickh · 03-11-2015, 08:06 PM

Quote:

Originally Posted by Pro Stock John

I did 3.91's in my L99. And the car is funnerer from a dig and from a roll.

No doubt each WOT upshift is much quicker, I gather feels like much more torque when the transmission shifts too. SOTP feeling is much more aggressive.

How about the down shifts at WOT? For example, while driving at say 35 to 75 mph while cruising and the computer downshifts at mid throttle to even better WOT.

Slvr-camaro15 · 08-10-2018, 08:13 AM

Older thread wanted to revive . Any thoughts ??

Nb1081 · 08-10-2018, 08:40 AM

My thoughts are I'd like a set

LCPLPunk · 08-10-2018, 07:15 PM

I JUST picked my car up today with the 3.91s and honestly I'm not impressed yet. Now, I was babying it (mostly) and I didn't have a new tune yet, but it wasn't quite what I was expecting. I've put 20 miles on the gears so far so maybe after the tune and some more miles it will get better.

06-06-2013, 09:09 AM	#15
bhillakaiceberg Drives: 2011 2SS/RS & 2017 1SS Join Date: Apr 2011 Location: Maryland Posts: 1,960	Im thinking about doing 3.70 Gears as well. __________________ *2011 Chevrolet Camaro 2SS/RS L99* (1 of 782) 10.78 @125mph ALL MOTOR SBE Built/Tuned by Me 2017 Chevrolet Camaro 1SS Auto 9.29 @144.57mph ALL MOTOR SBE #TEAMGPI Gwatney Performance Innovation

06-08-2013, 07:10 PM	#16
Baltimorejohn1 Drives: Camaro 2SS Join Date: Apr 2011 Location: DC Metro Posts: 1,257 View My Garage	This lower (higher numerically) ratio rear drive gear will increase effective rear wheel torque multiplication in 2010 - 2013 SS Camaros by 13% (over standard 3.45 ratio) in a manual tansmission-equipped car, and 20% (over standard 3.27) in an automatic-equipped car. This gearset is the original equipment ratio found in the 1LE 2013 Camaro package. NOTE: This change will affect the indicated vehicle speed. Recalibration is required for accurate speedometer reading. https://theblock.com/sema12/part/6 __________________ K&N TYPHOON http://www.youtube.com/user/Baltimorejohn1

07-25-2013, 11:27 AM	#18
ramiloutfi Drives: Camaro ZL 550 SLP Join Date: Jul 2012 Location: Dubai, UAE Posts: 49	I'm using 3.91 gears with all the below mods and Nitto NT05 tires 315 / 35 rear. No issues at all __________________ Cold-Air Inductions® System \| ARH 1 7/8" Headers w/o Cats \| SLP PowerFlo-X Crossover Pipe \| SLP Powerflo Axle Back Exhaust \| TVS2300 Magnacharger w/ 3.0" pulley \| NEP 223/235 Custom Cam \| Lunati Gold Dual Valve Springs \| Manley 7.400" Pushrods \| Injector Dynamics ID850 Injectors \| Nick Williams 102MM FBW Throttlebody \| Eibach springs w/ 1" drop \| SLP Adjustable sway bars \| Forgestar F14 20" \| Nitto NT555R tires \| Baer Drilled & Slotted Rotors \| Hawk HPS Break Pads \| Lingenfelter 3.91 Gear Kit

07-26-2013, 11:14 PM	#20
axis Search Ninja Drives: 2010 Black 2SS/RS A6 Join Date: Oct 2009 Location: Central Ark Posts: 7,183	They would have zero affect on your top speed. Our cars have the gears to go over 250mph. We just don't have the HP or aero to get there. They would affect your cruise rpm, thus MPG. By how much, I don't know. __________________ 2010 Black 2SS/RS A6 Halltech CF 102 fed GPI modded intake manifold Bo (knows) White ported TB Kooks LT's/ Dynomax VT Pfadted (springs/sways) Dyno tuned by Rhino and GPI I once parallel parked a train.

03-11-2015, 07:22 PM	#24
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	I did 3.91's in my L99. And the car is funnerer from a dig and from a roll. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

03-11-2015, 05:12 PM	#21
Rickh Drives: 2014 Camaro 2SS/RS L99 Join Date: Jun 2013 Location: Orange County, CA Posts: 81	I too am considering 3:70 gears for my A6. Once installed, won't the upshift and downshift MPH speeds in each gear be effected? Meaning, a custom tuner would need to adjust the MPH in at least 1-4 and downshifts in each gear too? My assumption is yes.

03-11-2015, 06:46 PM	#23
Rickh Drives: 2014 Camaro 2SS/RS L99 Join Date: Jun 2013 Location: Orange County, CA Posts: 81	Ok. Sounds like mostly WOT road testing, tuner and I after gears installed. Seems with the A6 upshifts/downshifts controlled by MPH, utilizing HP Tuners programming. We did the same on previous tunes, and with gears will need to re-adjustments again. Hopeful I could find someone within my area, Orange County with an A6 whom has swapped out gears, see how the car responds afterwards.

08-10-2018, 08:13 AM	#26
Slvr-camaro15 Drives: 2017 zl1 ,2010 SS /RS L99 Join Date: Sep 2017 Location: Long Island ,Ny Posts: 380	Hi any thoughts !!! Older thread wanted to revive . Any thoughts ?? __________________ 2017 zl1 - rotofab CAI , PDR , Nav . 2010 camaro SS - Procharger D1 sc (Stage 2 with upgraded intercooler)+ whole lot of other goodies ( too many to list )

08-10-2018, 08:40 AM	#27
Nb1081 Drives: 10 2ss/rs Join Date: Jul 2018 Location: Shelby ny Posts: 436	My thoughts are I'd like a set __________________ [/SIGPIC]10 2ss ls3 sw long tubes,cai intake,phastek scoop,se3" exhaust,elite e2, bw stg2tb, tsp f35, motive 4.10 lpw cover, 15" conversion, 510whp tuned by john donovan

08-10-2018, 07:15 PM	#28
LCPLPunk USA-1 Drives: 2010 Camaro SS L99 Join Date: Jul 2016 Location: Near DC Posts: 1,893 View My Garage	I JUST picked my car up today with the 3.91s and honestly I'm not impressed yet. Now, I was babying it (mostly) and I didn't have a new tune yet, but it wasn't quite what I was expecting. I've put 20 miles on the gears so far so maybe after the tune and some more miles it will get better. __________________ "A Camaro in the garage is safe, but that's not what Camaros are built for..." R2C CAI / Apex Scoop / VMAX Ported TB / Speed Engineering LTHs / X-pipe / GPI port/rod-mod intake manifold / Circle D 3200 278mm Converter / 3.91 gears / DynoSteve tuned / 1LE Shocks/Struts/Toe Links / ZL1 Rear Sway Bar / Z/28 Trailing arms / Prothane Radius Arm & Subframe Bushings / BMR UCA Bracket, Steering rack bushing / B&M Tranny Cooler / RX Catch Can / Jannetty Tranny Dipstick / 2012+ Heater Hose / 2013+ Rearview Mirror / Fuel rail flip / Drake shifter / Oil Cooler Delete