Now that I have 2013 GT automatic I am trying to decide which rear gear. I will ordering a MagnaCharger next week. So which would be the better gear, stock 3:15, 3:36, 3:55 or 3:73? Car will be my "play car" so MPG is unimportant. It will see occasional strip use with drag radials. Pretty even split between 1/8 and 1/4 mile. We do have a pretty active "street racer" group south of Birmingham.

 

Gears are, by definition, a torque multiplier. That Magnacharger will produce a ton of torque anyway, so gearing isn't nearly as important when forced induction is added. I'd suggest leaving the factory 3.15 gears in the car with the Magnacharger. If you end up not supercharging, I personally believe that 4.10 gears work nicely with the 5.0L automatics.

 

^ This ^

 

Agreed..

 

Shoot I've been 11.2 with my 3.15's and I'm N/A. Those gears work for me.

 

Think I will leave the 3.15 in place for now. I have some 3.36 gears laying around in the man cave somewhere. The 8.8 is pretty easy to swap gears. GB I am not sure how streetable your torque converter is N/A.

 

My converter is extremely street-able. You don't even know it's there until you mash the gas in which case my 295/55-15's go up in smoke.

 

Slap the magnacharger on there and then see how traction is and how quickly you go through 1st gear. If everything is fine, you may benefit from 3.36 or 3.55. I wouldn't change the gears and boost it at the same time. Just my 2 cents

 

annnd nevermind. lol I guess I should've read through the entire thread before posting

 

The 2013 did not work out. Returned it. Little title issue. So here is my new one. Picked it up today. 2012 Premium auto loaded. Let the adventure begin.

 

wait...what?? What happened?

 

You rebound fast! But it looks great! (Plus you got the better front end) lol

 

Like Scott said, these Circle-D torque converters are very streetable. I had them make mine flash to 5,000 rpm's. My car is a daily driver and launches hard at the track.