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Old 06-06-2013, 09:09 AM   #15
bhillakaiceberg

 
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Im thinking about doing 3.70 Gears as well.
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Old 06-08-2013, 07:10 PM   #16
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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
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Old 06-08-2013, 07:13 PM   #17
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Originally Posted by M.D.P84 View Post
thank you very much, loved the videos
You're more than welcome
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Old 07-25-2013, 11:27 AM   #18
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I'm using 3.91 gears with all the below mods and Nitto NT05 tires 315 / 35 rear. No issues at all
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Old 07-26-2013, 10:00 PM   #19
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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.
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Old 07-26-2013, 11:14 PM   #20
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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.
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Old 03-11-2015, 05:12 PM   #21
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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.
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Old 03-11-2015, 06:23 PM   #22
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Originally Posted by Rickh View Post
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
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Old 03-11-2015, 06:46 PM   #23
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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.
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Old 03-11-2015, 07:22 PM   #24
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I did 3.91's in my L99. And the car is funnerer from a dig and from a roll.
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12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
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Old 03-11-2015, 08:06 PM   #25
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Originally Posted by Pro Stock John View Post
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.
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