3.45 or 3.91's in my L99 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

vandervortadam · 03-07-2013, 11:39 PM

I have a 2010 L99 i have headers cold air ported throttle body and jre tune. Been looking at gears just want some input. I have heard the 3.91's might be to much for a weekend car. No track time for me just crusing around having some fun. I have 21" pzeros if that matters. Dont know if they will help at all with tractikn. Also am i running a risk of hurting any other drive train with either gears.

Thanks.

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Supercharged SS · 03-08-2013, 12:12 AM

Quote:

Originally Posted by vandervortadam

I have a 2010 L99 i have headers cold air ported throttle body and jre tune. Been looking at gears just want some input. I have heard the 3.91's might be to much for a weekend car. No track time for me just crusing around having some fun. I have 21" pzeros if that matters. Dont know if they will help at all with tractikn. Also am i running a risk of hurting any other drive train with either gears.

Thanks.

Posted from Camaro5.com App for Android

If you want the biggest bang for your buck go with the 3.91's. For what the swap costs the 3.45 doesn't give that much more than the current 3.27. You'll love what the 3.91's feel like. You will have less traction than you do know but only if you hammer it. Regular driving you'll be fine. Same with the probability of breaking parts. Anything can happen but you really aren't increasing the chances all that much.

orangejuice · 03-14-2013, 10:42 PM

Do you need a tune if you swap gears?

Chevrolade · 03-14-2013, 10:54 PM

Yes u sure do to correct speedo and shift points.btw ill be going with 3:91 on my l99

orangejuice · 03-15-2013, 09:58 AM

Is yours a daily driver? Are those OK for every day driving?

biggerisbetter · 03-15-2013, 10:05 AM

i daily drive mine and LOVE my gears. go with the 3:91's. you will not regret this desicion. jannetty racing will also update your tune if you buy the gears from him

orangejuice · 03-15-2013, 12:29 PM

How much did the gears and tune run you?

biggerisbetter · 03-15-2013, 01:58 PM

$1000 bucks ish. if i was going to do it again i would order the gears from jannetty racing i think the 1le gears are $350 ( http://www.jreperformanceparts.com/2...-91-gears.html ) and ted will update the tune for free (a $315 value). i found a custom trans shop local that said if i remove the diff and bring it all to him he would install for 400 bucks. so for 750 you could have your gears installed and tuned. if i wanted the guy to do all the work he said it would be 700 for the install. just shop around i got qouted from 400 - 2500 haha the high end was the dealer

hrpiii · 03-15-2013, 02:07 PM

Why not 3.70's? Is that somewhere in the middle?

biggerisbetter · 03-15-2013, 02:15 PM

Quote:

Originally Posted by hrpiii

Why not 3.70's? Is that somewhere in the middle?

from previous experiences with my jeeps i didnt seem like 3:27 to 3:70 was enough of a difference to justify the cost for me. the 3:91's you will definately feel and notice. im not saying the 3:70's are no good im simply saying for me it was personal preference and i wanted all i could get while still being able to drive on the hwy

orangejuice · 03-15-2013, 02:49 PM

Hmmm...sounds like I need to do some thinking first then.

biggerisbetter · 03-15-2013, 02:58 PM

Quote:

Originally Posted by orangejuice

Hmmm...sounds like I need to do some thinking first then.

at the end of the day it all depends on what you are doing with the car. i daily drive mine and am not building it for a track. not to say i wont go to a dragstrip but the only reason people say not to put them in these cars is because in the 1/4 mile you could have one more shift. if that happens that happens. the 3:91's are a blast on the street and that is where i enjoy my car 99.995 of the time. so it was an easy decision for me. people also say 1st gear is to tall in the auto but i have no complaints and would do this mod all over again. i say go for it you wont be dissapointed

vandervortadam · 03-15-2013, 05:05 PM

Where is the cheapest place to get a full diff already to go?

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Nitroman28 · 03-15-2013, 05:11 PM

I just put the 3.45 in mine and can't tell a difference. I just did it to maybe pick a little up at the track.

03-07-2013, 11:39 PM	#1
vandervortadam Drives: 2010 Camaro 2ss black 21's Join Date: May 2012 Location: Wisconsin Posts: 148	3.45 or 3.91's in my L99 I have a 2010 L99 i have headers cold air ported throttle body and jre tune. Been looking at gears just want some input. I have heard the 3.91's might be to much for a weekend car. No track time for me just crusing around having some fun. I have 21" pzeros if that matters. Dont know if they will help at all with tractikn. Also am i running a risk of hurting any other drive train with either gears. Thanks. Posted from Camaro5.com App for Android

03-14-2013, 10:42 PM	#3
orangejuice H1 OFCR Drives: 2013 ZL1 Blue Ray Metallic Join Date: Jun 2011 Location: Shelby Twp., Michigan Posts: 1,320 View My Garage	Do you need a tune if you swap gears? __________________ Corsa Rotofab BBK ZL1 Hood/Fascia AAC Afterburners/Sidemarkers Havoc Black Chrome 5% Tint/20% Smoked Taillights

03-15-2013, 09:58 AM	#5
orangejuice H1 OFCR Drives: 2013 ZL1 Blue Ray Metallic Join Date: Jun 2011 Location: Shelby Twp., Michigan Posts: 1,320 View My Garage	Is yours a daily driver? Are those OK for every day driving? __________________ Corsa Rotofab BBK ZL1 Hood/Fascia AAC Afterburners/Sidemarkers Havoc Black Chrome 5% Tint/20% Smoked Taillights

03-15-2013, 10:05 AM	#6
biggerisbetter lll Drives: 2010 camaro ss L99 Join Date: Jan 2013 Location: new orleans Posts: 1,176	i daily drive mine and LOVE my gears. go with the 3:91's. you will not regret this desicion. jannetty racing will also update your tune if you buy the gears from him __________________ PERFORMANCE DYNATECH LT 1 7/8 HEADERS, CATLESS MID PIPES, CORSA CATBACK, CAI. COLD AIR INTAKE w/ SCOOP, 1LE 3:91 GEARS, LETHAL RACING PROWLER CAM, LETHAL RACING DYNO TUNE, ENERGY CRADDLE BUSHING INSERTS, PADDLE SHIFTER RELOCATE KIT, 449RWHP/438TQ APPEARANCE COPO HOOD, ZL1 SPOILER, SLP BLACKOUT PANEL, PLASTI DIP WHEELS, HERITAGE GRILL, RETRO SS EMBLEMS, WEATHER TECH FLOOR MATS, ORANGE STITCHING

03-15-2013, 12:29 PM	#7
orangejuice H1 OFCR Drives: 2013 ZL1 Blue Ray Metallic Join Date: Jun 2011 Location: Shelby Twp., Michigan Posts: 1,320 View My Garage	How much did the gears and tune run you? __________________ Corsa Rotofab BBK ZL1 Hood/Fascia AAC Afterburners/Sidemarkers Havoc Black Chrome 5% Tint/20% Smoked Taillights

03-14-2013, 10:54 PM	#4
Chevrolade Account Suspended Drives: 2010 2SS/RS Join Date: Jan 2013 Location: Texas Posts: 1,050	Yes u sure do to correct speedo and shift points.btw ill be going with 3:91 on my l99

03-15-2013, 01:58 PM	#8
biggerisbetter lll Drives: 2010 camaro ss L99 Join Date: Jan 2013 Location: new orleans Posts: 1,176	$1000 bucks ish. if i was going to do it again i would order the gears from jannetty racing i think the 1le gears are $350 ( http://www.jreperformanceparts.com/2...-91-gears.html ) and ted will update the tune for free (a $315 value). i found a custom trans shop local that said if i remove the diff and bring it all to him he would install for 400 bucks. so for 750 you could have your gears installed and tuned. if i wanted the guy to do all the work he said it would be 700 for the install. just shop around i got qouted from 400 - 2500 haha the high end was the dealer __________________ PERFORMANCE DYNATECH LT 1 7/8 HEADERS, CATLESS MID PIPES, CORSA CATBACK, CAI. COLD AIR INTAKE w/ SCOOP, 1LE 3:91 GEARS, LETHAL RACING PROWLER CAM, LETHAL RACING DYNO TUNE, ENERGY CRADDLE BUSHING INSERTS, PADDLE SHIFTER RELOCATE KIT, 449RWHP/438TQ APPEARANCE COPO HOOD, ZL1 SPOILER, SLP BLACKOUT PANEL, PLASTI DIP WHEELS, HERITAGE GRILL, RETRO SS EMBLEMS, WEATHER TECH FLOOR MATS, ORANGE STITCHING

03-15-2013, 02:07 PM	#9
hrpiii AKA "Beefcake" Drives: 2023 ZL1 Sharkskin Join Date: Oct 2009 Location: Indy Posts: 8,572	Why not 3.70's? Is that somewhere in the middle?

03-15-2013, 02:49 PM	#11
orangejuice H1 OFCR Drives: 2013 ZL1 Blue Ray Metallic Join Date: Jun 2011 Location: Shelby Twp., Michigan Posts: 1,320 View My Garage	Hmmm...sounds like I need to do some thinking first then. __________________ Corsa Rotofab BBK ZL1 Hood/Fascia AAC Afterburners/Sidemarkers Havoc Black Chrome 5% Tint/20% Smoked Taillights

03-15-2013, 05:05 PM	#13
vandervortadam Drives: 2010 Camaro 2ss black 21's Join Date: May 2012 Location: Wisconsin Posts: 148	Where is the cheapest place to get a full diff already to go? Posted from Camaro5.com App for Android

03-15-2013, 05:11 PM	#14
Nitroman28 Drives: 2010 Camaro SS 416/4L80 Join Date: Oct 2010 Location: Arkansas Posts: 1,835 View My Garage	I just put the 3.45 in mine and can't tell a difference. I just did it to maybe pick a little up at the track.