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

AndrewSS/RS · 10-25-2013, 08:35 PM

Today I picked up my car after having 3.91 gears installed. It felt strange when I first started driving it. It has been been a few days since I have driven it and I had back surgery since I last drove it as well. The car obviously accelerated quicker but the clutch, parking brake, gear shifter all felt different. When I say different I don't mean anything was wrong everything just felt foreign to me. After driving it for about half an hour or so I got used to it and felt okay with everything once again.

This is one mod where you can easily feel the difference with the butt dyno. I can see this is something I am going to have fun with once I get used to it. This was a difficult install to do where I live. It took call after call in my area until I could find someone to do the install. Found one place out of 20+ phone calls and it was a dealer. Glad I did this mod and would recommend it.

2010 SSRS · 10-25-2013, 08:44 PM

Definitely one of the best mods

45thCamaro · 10-25-2013, 09:22 PM

What is the primary reason for changing the gears? Will you be able to accelerate more before having to change gears? Sorry if it's a stupid question, just uneducated on this.

JCunningham · 10-26-2013, 12:51 AM

you will be shifting faster because you will get to redline and speed faster.

Erict · 10-28-2013, 07:51 PM

What's the approximate cost to have this mod done?

camguynj · 10-28-2013, 08:43 PM

Quote:

Originally Posted by AndrewSS/RS

Today I picked up my car after having 3.91 gears installed. It felt strange when I first started driving it. It has been been a few days since I have driven it and I had back surgery since I last drove it as well. The car obviously accelerated quicker but the clutch, parking brake, gear shifter all felt different. When I say different I don't mean anything was wrong everything just felt foreign to me. After driving it for about half an hour or so I got used to it and felt okay with everything once again.

This is one mod where you can easily feel the difference with the butt dyno. I can see this is something I am going to have fun with once I get used to it. This was a difficult install to do where I live. It took call after call in my area until I could find someone to do the install. Found one place out of 20+ phone calls and it was a dealer. Glad I did this mod and would recommend it.

Did the dealer also do the speedo recalc tune to sync the speedo with the new gear ratio?

JCunningham · 10-28-2013, 10:33 PM

Quote:

Originally Posted by Erict

What's the approximate cost to have this mod done?

I paid a little under $700 but I took the rear end out and put it back in the car

Apex Motorsports · 10-29-2013, 06:06 AM

Quote:

Originally Posted by 45thCamaro

What is the primary reason for changing the gears? Will you be able to accelerate more before having to change gears? Sorry if it's a stupid question, just uneducated on this.

Torque multiplication. It takes the power you are already making and puts it to better use. Significant increase in acceleration and off the line performance.

2SS2010 · 10-29-2013, 07:30 AM

What are you guys seeing for MPG with 3.91's?

SSDan · 10-29-2013, 07:46 AM

Quote:

Originally Posted by 2SS2010

What are you guys seeing for MPG with 3.91's?

A little better around town and a little less on the highway. Around town I can get into and hold a higher gear easier which puts the engine at a lower rpm for the same speed.

Honestly, what matters the most is how I chose to drive. When I'm ripping on the gears I try to ignore the gas gauge. When I'm just putting around there is no big difference.

2SS2010 · 10-29-2013, 08:10 AM

Can you put a number on it?

Apex Motorsports · 10-29-2013, 08:42 AM

Quote:

Originally Posted by 2SS2010

Can you put a number on it?

It depends on where and how you drive your car. If you drive around town you will get better fuel economy. On the interstate you will see a slight decrease. On average it is probably a wash. At worst you might see a 2-3MPG reduction.

JCunningham · 10-29-2013, 01:12 PM

Quote:

Originally Posted by 2SS2010

What are you guys seeing for MPG with 3.91's?

25-26mpg@75mph. Generally I lost 2mpg. highway gained 1-2mpg in town. but I just want to romp on it all the time now

AndrewSS/RS · 10-29-2013, 10:28 PM

The install at the dealer cost me about $850. I considered it a deal since they were the only place I found find to do the install. As for gas mileage, I tend to get on the gas pedal (too much) and I do more city driving instead of highway but I haven't noticed a big difference in my mileage. It seems about the same for me.

I will second that with increased torque and acceleration. Even with this the car is smooth and stable during acceleration. This is my favorite mod so far.

The dealer did not do any changes for the speedometer. I had the email tune from Jannetty Racing.

10-25-2013, 08:35 PM	#1
AndrewSS/RS Drives: 2013 Black 1SS/RS Join Date: Jul 2013 Location: Charleston, WV Posts: 24	3.91 gears installed Today I picked up my car after having 3.91 gears installed. It felt strange when I first started driving it. It has been been a few days since I have driven it and I had back surgery since I last drove it as well. The car obviously accelerated quicker but the clutch, parking brake, gear shifter all felt different. When I say different I don't mean anything was wrong everything just felt foreign to me. After driving it for about half an hour or so I got used to it and felt okay with everything once again. This is one mod where you can easily feel the difference with the butt dyno. I can see this is something I am going to have fun with once I get used to it. This was a difficult install to do where I live. It took call after call in my area until I could find someone to do the install. Found one place out of 20+ phone calls and it was a dealer. Glad I did this mod and would recommend it.

10-25-2013, 08:44 PM	#2
2010 SSRS Drives: 3 V8 Camaros Join Date: May 2009 Location: The Ocean State Posts: 111,187 View My Garage	Definitely one of the best mods __________________ Jannetty Racing JRE Street Package

10-26-2013, 12:51 AM	#4
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	you will be shifting faster because you will get to redline and speed faster. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

10-25-2013, 09:22 PM	#3
45thCamaro Drives: 2012 Camaro 45th Anniversary RS Join Date: Nov 2012 Location: New York Posts: 2,418	What is the primary reason for changing the gears? Will you be able to accelerate more before having to change gears? Sorry if it's a stupid question, just uneducated on this.

10-28-2013, 07:51 PM	#5
Erict Drives: 2010 2SS TVS 2300 Join Date: Sep 2013 Location: Aubrey, TX Posts: 26	What's the approximate cost to have this mod done?

10-29-2013, 07:30 AM	#9
2SS2010 Drives: 2010 2 SS Join Date: Oct 2013 Location: Georgia Posts: 594	What are you guys seeing for MPG with 3.91's?

10-29-2013, 08:10 AM	#11
2SS2010 Drives: 2010 2 SS Join Date: Oct 2013 Location: Georgia Posts: 594	Can you put a number on it?

10-29-2013, 10:28 PM	#14
AndrewSS/RS Drives: 2013 Black 1SS/RS Join Date: Jul 2013 Location: Charleston, WV Posts: 24	The install at the dealer cost me about $850. I considered it a deal since they were the only place I found find to do the install. As for gas mileage, I tend to get on the gas pedal (too much) and I do more city driving instead of highway but I haven't noticed a big difference in my mileage. It seems about the same for me. I will second that with increased torque and acceleration. Even with this the car is smooth and stable during acceleration. This is my favorite mod so far. The dealer did not do any changes for the speedometer. I had the email tune from Jannetty Racing.