Great Bottom End Power
July 27, 2012
First of all I installed these on a 2013 Manual GT, the car had 3,300 miles on it. The car originally had a 3:31 rear gear. I should have bought the car with the 3:73 rear gear. Mods so far are as follows - Flowmaster American Thunder Axleback, Magnaflow O/R Tru X-Pipe, Airaid CAI, SCT Tuner (93 Octane race tune), and now the 4:10 Motive gear. I'm only getting started......
I debated for two months on either installing the 3:73 or the 4:10. Some people I spoke to said 4:10 would not be to much and others said this gear would be to steep. So for you people who are trying to figure out which gear to go with, I'm going to try to help you make your decision.
To start if I had it to do over again, and I might in a year or so, I would probably go with the 3:73 gear. Just because I do a lot of interstate driving at 80 mph. And at 80 mph I am running about 2800 rpm's (effects fuel milage). But if your average speed is 70 or under the 4:10 would be perfect. The take off power is awesome, it's like your car wants to be above the 3000 rpm range all the time. So the power is always ready to be unleashed. With the six speed manual transmission your not in any gear very long, this really makes the car get up to speed very quickly.
As for the fuel milage - I've had these gears for 3 days (now I have been playing a little) and I seem to be losing about a 1.5 mpg. I know three days doesn't seem like enough time to tell, but I drive at least 50 miles a day.
As for the whining noise some people get after installing the 4:10 gear. I have little to no noise at all. It's all in how good of a pattern set up the installer gets. I watched the installation of my gear to be sure it was done correctly. And the pattern I had was perfect. The backlash was also well within tolerance. So make sure you check around and find someone who is highly spoken of to do the install.
Overall this is a very good mod for the money. The 4:10 is awesome to play with, at stoplights it a great feeling to have that power to get up and go. As long as you don't drive at a speed of 80 or above regularly this gear is perfect and even if you do it's still pretty good. Just eats up the gas.
I hope this helps!!!