My new US Gear 4.10s... - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Moreno1 · 07-18-2012, 01:33 PM

Dang, thats a great upgrade! I wish my car was finish and running already so I could get them done :(

strych9 · 07-18-2012, 01:51 PM

Quote:

Originally Posted by BubbaSS

Chevy got it right with the 1LE, they're selling those with 3.91 gears. Wish they figured that out earlier instead of being so concerned with fuel economy :/ Congrats!

Funny thing is, going from a 3.08 to a 4.10 gear in my Mustangs had no affect on the fuel economy at all. As backwards as that sounds, I'm not kidding.

OE gears are a compromise of performance, emissions, and economy. The faster an engine spins, the more exhaust byproducts are discharged. But, since steeper gears reduce the actual power demand of the engine, the economy is sometimes retained as intended.

2010SSRSM6 · 07-18-2012, 02:03 PM

Have you noticed any noise from the gears over the factory set? How many miles do you have on them now?

PAUL SS · 07-18-2012, 02:15 PM

I want 4.10's, but it will have to wait. I had 4.56's in my 73 Z28 that came with 3.73's, what a nice upgrade!

koj · 07-18-2012, 05:30 PM

Did they use any kind of install kit, new caps

Sent from my iPhone using Tapatalk

ss/rs-matt · 07-19-2012, 01:46 AM

Ok so I have about 100 miles on the gears now and decided to really get on it tonight....I just couldn't resist...lol. Man this thing pulls like a beast! 1st, 2nd, and 3rd are gone quick, were before they would wind up kinda slow.

With the stock gears at 70 I would down shift into 3rd to get it into the right power band, now I can use 4th and works perfect.

No noises from the rear at all. Everything seems perfect, I couldn't be happier!

ss/rs-matt · 07-19-2012, 01:54 AM

Quote:

Originally Posted by koj

Did they use any kind of install kit, new caps

Sent from my iPhone using Tapatalk

I don't think so, they had all the right shims there as all they do is rear ends. However, they did install a new pinion seal and I'm not sure if they had that in stock or ordered it and had it ready for my appt. The end caps and stock bearings were all in great shape and reused. They did have bearing there just incase my were bad.

mpyle007 · 07-20-2012, 01:38 PM

Im really curious how the new gears will improve your quarter mile times? Do the gears definately give you more of an edge on the street?

BubbaSS · 07-20-2012, 01:54 PM

Quote:

Originally Posted by strych9

Funny thing is, going from a 3.08 to a 4.10 gear in my Mustangs had no affect on the fuel economy at all. As backwards as that sounds, I'm not kidding.

OE gears are a compromise of performance, emissions, and economy. The faster an engine spins, the more exhaust byproducts are discharged. But, since steeper gears reduce the actual power demand of the engine, the economy is sometimes retained as intended.

Very true...weird that you didn't see a change in MPG's with such a drastic gear swap...Maybe you had a lighter foot after the swap

combined with a lot of city driving could balance out the MPG's? Either way it must have been a great upgrade

BubbaSS · 07-20-2012, 02:10 PM

Quote:

Originally Posted by mpyle007

Im really curious how the new gears will improve your quarter mile times? Do the gears definately give you more of an edge on the street?

There have been claims of a gain of 2/10-3/10's on the quarter mile with gears only. Here's a nice article to help you with your decision:
http://www.automedia.com/Differentia...ht20011201rg/1

ss/rs-matt · 07-20-2012, 03:11 PM

It's all about mechanical advantage. Think of a 21 speed mountain bike, the 3 gears in the front attached to the pedals would be the same as the rear gears in your camaro. Let's call the largest gear a 3.45 ratio, the middle a 4.11 an the little one a 4.56. If you start from a dead stop in the largest or 3.45 gear it's going require more leg power to over come the weight of you and the bike or use more fuel. If you start in the middle gear or 4.11 it will be much easier on your legs or require less fuel. This is why some actually see an improvement in gas mileage with lower gears, because the engine doesnt have to work as hard. This will be especially true for those who do a lot of stop and go traffic. 4.11s get a bad wrap because in the old days of TH350 and TH400 trannys you only had 3 gears and 3rd was a 1.1 which meant at 70mph your enigine was screaming at 3500rpm and killed fuel mileage. Now we have 6speed gear boxes, 4th is the 1.1 and then you've got TWO overdrives after that, 5th an 6th. So now we get the best of both worlds, low end grunt and still maintain great fuel economy. :-)

trans665 · 07-20-2012, 06:49 PM

I'm going for the 4.11 gears, just have to find the right shop for the install here in corpus, i dont think the shop i go too do the gear swaps.

i wonder if gratstate or big chain tranny shop will do this?

trans665 · 07-20-2012, 06:55 PM

where did you buy ur 4.10 gears from... can you provide me a link??

ss/rs-matt · 07-20-2012, 10:26 PM

Quote:

Originally Posted by trans665

where did you buy ur 4.10 gears from... can you provide me a link??

Devin at Untirax ordered them for me.

http://www.gounitrax.com/

07-18-2012, 02:03 PM	#31
2010SSRSM6 Drives: My wife crazy with my C5 usage. Join Date: Apr 2009 Location: DFW Posts: 6,558 View My Garage	Have you noticed any noise from the gears over the factory set? How many miles do you have on them now? __________________ UNDER CONSTRUCTION......again......

07-18-2012, 02:15 PM	#32
PAUL SS The Mark of Excellence Drives: 2010 ABM 1SS RS LS3 Join Date: Jan 2009 Location: Smallest State in the Union Posts: 8,690 View My Garage	I want 4.10's, but it will have to wait. I had 4.56's in my 73 Z28 that came with 3.73's, what a nice upgrade! __________________ BMR, CAI, DynoMax, Elite Eng., Hurst, Jannetty, Clear Image Headers & Hi Flow cats, Jet Hot, LSR, TSW, VMax, Vredestein

07-19-2012, 01:46 AM	#34
ss/rs-matt Drives: 2015 ZL1 Join Date: Aug 2011 Location: California Posts: 1,731	Ok so I have about 100 miles on the gears now and decided to really get on it tonight....I just couldn't resist...lol. Man this thing pulls like a beast! 1st, 2nd, and 3rd are gone quick, were before they would wind up kinda slow. With the stock gears at 70 I would down shift into 3rd to get it into the right power band, now I can use 4th and works perfect. No noises from the rear at all. Everything seems perfect, I couldn't be happier! __________________ "Want to know whats cooler than your murdered out Honda Civic? ...Any Audi." Daniel Tosh

07-20-2012, 01:38 PM	#36
mpyle007 Drives: 2011 Camaro 2SS L99 Join Date: Jun 2011 Location: Texas Posts: 301	Im really curious how the new gears will improve your quarter mile times? Do the gears definately give you more of an edge on the street? __________________ *2011 Camaro 2SS L99 A6* Rotofab CAI w/ race scoop TSP Long tube headers w/ high flow cats and full x-pipe GMPP axle back exhaust system Custom Dyno tune by ARD (Advanced Racing Dynamics) BMR 1.4" Springs all four corners "There is no replacement for displacement"

07-20-2012, 03:11 PM	#39
ss/rs-matt Drives: 2015 ZL1 Join Date: Aug 2011 Location: California Posts: 1,731	It's all about mechanical advantage. Think of a 21 speed mountain bike, the 3 gears in the front attached to the pedals would be the same as the rear gears in your camaro. Let's call the largest gear a 3.45 ratio, the middle a 4.11 an the little one a 4.56. If you start from a dead stop in the largest or 3.45 gear it's going require more leg power to over come the weight of you and the bike or use more fuel. If you start in the middle gear or 4.11 it will be much easier on your legs or require less fuel. This is why some actually see an improvement in gas mileage with lower gears, because the engine doesnt have to work as hard. This will be especially true for those who do a lot of stop and go traffic. 4.11s get a bad wrap because in the old days of TH350 and TH400 trannys you only had 3 gears and 3rd was a 1.1 which meant at 70mph your enigine was screaming at 3500rpm and killed fuel mileage. Now we have 6speed gear boxes, 4th is the 1.1 and then you've got TWO overdrives after that, 5th an 6th. So now we get the best of both worlds, low end grunt and still maintain great fuel economy. :-) __________________ "Want to know whats cooler than your murdered out Honda Civic? ...Any Audi." Daniel Tosh

07-18-2012, 01:33 PM	#29
Moreno1 Drives: G5.R Join Date: Sep 2010 Location: SoCal Posts: 2,377	Dang, thats a great upgrade! I wish my car was finish and running already so I could get them done :(

07-18-2012, 05:30 PM	#33
koj Drives: 2006 Pontiac GTO Join Date: Dec 2010 Location: Somewhere down south Posts: 66	Did they use any kind of install kit, new caps Sent from my iPhone using Tapatalk

07-20-2012, 06:49 PM	#40
trans665 Drives: 2013 2ss Join Date: May 2011 Location: corpus christi Posts: 488	I'm going for the 4.11 gears, just have to find the right shop for the install here in corpus, i dont think the shop i go too do the gear swaps. i wonder if gratstate or big chain tranny shop will do this?

07-20-2012, 06:55 PM	#41
trans665 Drives: 2013 2ss Join Date: May 2011 Location: corpus christi Posts: 488	where did you buy ur 4.10 gears from... can you provide me a link??