How Bad the fuel consumption gets after install of 4:10 Gear?
02-12-2009, 09:34 PM
#1
3rd Gear Member
Thread Starter
Join Date: Jun 2008
Location: Texas
Posts: 542
How Bad the fuel consumption gets after install of 4:10 Gear?
I am considering on installing 4:10 gears on my 2007 GT/CE Convertible with K&N Cold air intake Borla Stingers and an SCT Tuner. The car has 29000miles. I am currently getting about 25mpg highway at 80mph type of driving and about 15-16 City stock tune.
Additionally are the Gears something I can install myself? I am fairly handy, but with little experience on mods. (I have installed all the mods listed above plus changes all the lights on the car).
Thanks a lot for your input
Additionally are the Gears something I can install myself? I am fairly handy, but with little experience on mods. (I have installed all the mods listed above plus changes all the lights on the car).
Thanks a lot for your input
02-12-2009, 09:44 PM
#2
5th Gear Member
Join Date: Mar 2007
Location: Deep in the <3 of Tx
Posts: 3,925
Unless you've done this before, DO NOT do the gears yourself. It's hard to get them to not whine, even when done by people with experience. Take it to a performance shop.
4.10s may improve your city MPG but hurt your highway unless you stay under 60 to 65. 70mph or more will cause a MPG drop for sure. I've heard several people get 1 to 2 less.
4.10s may improve your city MPG but hurt your highway unless you stay under 60 to 65. 70mph or more will cause a MPG drop for sure. I've heard several people get 1 to 2 less.
02-12-2009, 10:07 PM
#6
4th Gear Member
Join Date: Jul 2007
Location: California
Posts: 1,690
i'd change the bearing since you'll be in there anyway. i had mine installed for 200 bucks. definitely not something i could have done myself. i have about 40k miles with mine and no problems. you'll notice a huge difference and be glad you did it.
02-13-2009, 12:42 AM
#7
Multi-Tasking Moderator!
Join Date: Nov 2006
Location: Detroit Rock City!
Posts: 15,618
Personally if you worry about gas mileage with getting a new gear (4.10's) then why even do the mod
....not trying to be a dick but it may seem that way
....go for it and have them installed professionally and get a guarantee against whine....then enjoy (regardless of MPG)
(oh many have stated in the past 1-2 mpg sacrifice at cruising speeds {not 80 MPH})
....not trying to be a dick but it may seem that way....go for it and have them installed professionally and get a guarantee against whine....then enjoy (regardless of MPG)(oh many have stated in the past 1-2 mpg sacrifice at cruising speeds {not 80 MPH})
02-13-2009, 07:15 AM
#9
1st Gear Member
Join Date: May 2007
Location: New York
Posts: 56
I have gotten up to 25 mpg on the highway with my 4.10's installed. I also have a JLT intake with 93 octane tune installed and manual tranny. I usually get around 20 mpg driving around town. Installing the gears is not the easiest job either. Is does take some specialized tools.
