v6 gears - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Houston 45th · 10-22-2013, 12:59 PM

Hi everybody I had a question about gears on the lfx. I have a 2012 lfx and its an automatic and I was wondering what are the best gears that I can put in for the best performance. I came across some 3:55 but i cant remember I those would work with the automatic. I have also heard of people using 3:45 and I was wondering how much of a performance increase you can really feel. And is it really worth the money for the gears and the install?

thanks!

Jason@JacFab · 10-22-2013, 01:30 PM

3.55 gears are currently the ONLY direct swap in gears for the auto v6 rear end. People you read about with 3.45s, or anything for that matter other than 3.55, have swapped a complete SS rear end into their car, which there is many more gear options available.

Going from your current 3.27 gear to a 3.55 would be like having appx. 8.5% more torque.

KaBoom1701 · 10-22-2013, 03:11 PM

More torque?

How much is this V6 gear swap cost?

Jason@JacFab · 10-22-2013, 03:57 PM

Quote:

Originally Posted by KaBoom1701

More torque?

How much is this V6 gear swap cost?

Gears (new cost appx $550), minimum of a half install kit ($70, but possibly a full install kit depending on condition of rear end, up to $250), plus labor unless you are experience with setting up gears.

Rough guess, $1000-1300.

Then you would also need a tune to correct the speedometer reading.

RS Speedriver · 10-24-2013, 11:19 PM

you can get 3.91 gears for auto v6. gm released it. 300 bucks for the gears. and i am getting a complete ss rear end too. it could be done

Jason@JacFab · 10-25-2013, 11:06 AM

Quote:

Originally Posted by RS Speedriver

you can get 3.91 gears for auto v6. gm released it. 300 bucks for the gears. and i am getting a complete ss rear end too. it could be done

Where? I've never seen 3.91 gears for the 7.6" IRS rear end that an automatic v6 Camaro is equipped with. I have only seen them for the 8.6" rear that comes in the SS cars.

JohnnyBfromPeoria · 10-25-2013, 12:08 PM

Quote:

Originally Posted by RS Speedriver

you can get 3.91 gears for auto v6. gm released it. 300 bucks for the gears. and i am getting a complete ss rear end too. it could be done

Racn is correct, so far as everyone else says on here. Betcha can't do that swap if you weren't getting the SS rear end.

If so, post the part #.

Crickets.

John B.

RS Speedriver · 11-16-2013, 04:49 PM

but you can and I will.

Jason@JacFab · 11-16-2013, 04:56 PM

Quote:

Originally Posted by RS Speedriver

but you can and I will.

No one said you couldn't swap in an SS rear end and then install some 3.91s... They are just not made for the stock 7.6" IRS that comes in the v6 a6 cars... No doubt about it you can install an SS rear with these gears. If you do happen to know where I can get some for a 7.6" rear, feel free to post the part number.

etmx183 · 11-16-2013, 05:59 PM

3.91s in an SS differential or the manual V6 differential only. I've done it, I know what it takes to do it in an Auto V6. SS diff, axles, wheel hubs and back half of the SS driveshaft, tune for the speedometer. I'm only at 250 miles so far on the gear break in, so 250 more and I'll let you know how it feels. IneedAZ already has the gears in his car. So maybe he will chime in here too.

Apex Motorsports · 11-16-2013, 07:29 PM

Without doing a full rear end swap, 3.55 is the only option for the V6 A6 7.6" IRS. Swapping to the 3.55s provides an equivalent torque gain of approximately 10% or 27 ld.-ft. of torque and will only raise 70 MPH cruising RPM to 1950. If you don't notice a 10% improvement in torque......

hawkfe · 11-16-2013, 07:52 PM

Quote:

Originally Posted by etmx183

3.91s in an SS differential or the manual V6 differential only. I've done it, I know what it takes to do it in an Auto V6. SS diff, axles, wheel hubs and back half of the SS driveshaft, tune for the speedometer. I'm only at 250 miles so far on the gear break in, so 250 more and I'll let you know how it feels. IneedAZ already has the gears in his car. So maybe he will chime in here too.

Have had mine in since April with almost 8K on it.

KILLA BEE · 11-16-2013, 07:53 PM

Quote:

Originally Posted by Apex Chase

Without doing a full rear end swap, 3.55 is the only option for the V6 A6 7.6" IRS. Swapping to the 3.55s provides an equivalent torque gain of approximately 10% or 27 ld.-ft. of torque and will only raise 70 MPH cruising RPM to 1950. If you don't notice a 10% improvement in torque......

I'm already at 2000 rpm at 70 cruising at 70. In my maro with the catback soooo what should I expect.

KILLA BEE · 11-16-2013, 07:56 PM

Then again apex according to the other forum 2Ls can't do 3.55 anYway.

10-22-2013, 12:59 PM	#1
Houston 45th Drives: 45th 2LT/RS Join Date: Aug 2012 Location: Houston (Katy), TX Posts: 85	v6 gears Hi everybody I had a question about gears on the lfx. I have a 2012 lfx and its an automatic and I was wondering what are the best gears that I can put in for the best performance. I came across some 3:55 but i cant remember I those would work with the automatic. I have also heard of people using 3:45 and I was wondering how much of a performance increase you can really feel. And is it really worth the money for the gears and the install? thanks! __________________ 2012 45th 2LT RS, LG ZR28 (20x10 20x11) 275/40/r20 315/35/r20, MRT V2.0, Black bowties, MGP Caliper Covers, 15% Tint all around Last edited by Houston 45th; 10-22-2013 at 01:10 PM.

10-22-2013, 03:11 PM	#3
KaBoom1701 KaBoom1701 Drives: 13' ZL1 Red M6 Join Date: Dec 2012 Location: I.E. SoCal (Yucaipa) Posts: 8,630	More torque? How much is this V6 gear swap cost? __________________ Mods: Roto-Fab Intake, WW Res. kit & Big Gulp Air Scoop, Elite Catch Can, ATI Super Damper & 18% OD Pulley, LF Idler pulley bracket, Metco CC breather, ID850 Injectors, Stainless Power Headers w/ ceramic coating, TR71X Spark Plugs, JMS Fuel Pump Booster, Bo White TB, Tuned by Ted @ Jannetty Racing, Ron Davis HX, D3 Reservoir, Pfadt 1" Springs, Moreno Camber Plates, ZL1 Addons Splitter guard washers, Tow Hook kit & rock guards, Hurst Shifter Billet Plus 6 Speed Short Shifter, ZL1 DRL lighting harness, ZL1 Recaro Seats.

11-16-2013, 07:56 PM	#14
KILLA BEE Black lightning Drives: 2021 ZL1 1LE A10 Join Date: Mar 2013 Location: Nottingham Md Posts: 1,997 View My Garage	Then again apex according to the other forum 2Ls can't do 3.55 anYway. __________________ [ 2021 Camaro ZLE 10 speed

10-22-2013, 01:30 PM	#2
Jason@JacFab Drives: 2016 1LT RS Camaro; 72 Chevelle Join Date: Apr 2008 Location: Central Point, OR Posts: 5,688 View My Garage	3.55 gears are currently the ONLY direct swap in gears for the auto v6 rear end. People you read about with 3.45s, or anything for that matter other than 3.55, have swapped a complete SS rear end into their car, which there is many more gear options available. Going from your current 3.27 gear to a 3.55 would be like having appx. 8.5% more torque.

10-24-2013, 11:19 PM	#5
RS Speedriver Drives: 2018 camaro 1ss 1LE Join Date: Apr 2013 Location: B.C. Pitt Meadows Posts: 305 View My Garage	you can get 3.91 gears for auto v6. gm released it. 300 bucks for the gears. and i am getting a complete ss rear end too. it could be done

11-16-2013, 04:49 PM	#8
RS Speedriver Drives: 2018 camaro 1ss 1LE Join Date: Apr 2013 Location: B.C. Pitt Meadows Posts: 305 View My Garage	but you can and I will.

11-16-2013, 05:59 PM	#10
etmx183 Drives: 2012 Camaro 2LT RS Join Date: Mar 2012 Location: Baltimore, Maryland Posts: 1,633 View My Garage	3.91s in an SS differential or the manual V6 differential only. I've done it, I know what it takes to do it in an Auto V6. SS diff, axles, wheel hubs and back half of the SS driveshaft, tune for the speedometer. I'm only at 250 miles so far on the gear break in, so 250 more and I'll let you know how it feels. IneedAZ already has the gears in his car. So maybe he will chime in here too.

11-16-2013, 07:29 PM	#11
Apex Motorsports Drives: 2000 Camaro SS Join Date: Feb 2010 Location: Louisville, Ky. Posts: 25,179	Without doing a full rear end swap, 3.55 is the only option for the V6 A6 7.6" IRS. Swapping to the 3.55s provides an equivalent torque gain of approximately 10% or 27 ld.-ft. of torque and will only raise 70 MPH cruising RPM to 1950. If you don't notice a 10% improvement in torque......