Gear and converter for 2011 Coyote Mustang

casrak7 · 11-02-2015, 03:56 AM

For a max effort street car.........Im aware that a 3.15-3.30 rear gear is more optimum for overall first gear ratio, since the trans has a 4.17 first gear........But I believe 2nd gear in the trans is around a 2.5.......making 2nd gear similar to first gear in a normal 3 speed auto car. Any hints on gearing these cars? converter hints? Friends car currently has far too much overall first gear in it due to the 3.90 rear gear. He has a Circle D 4500 lock up converter. He tells me that the car didnt feel faster with the 3.31 gear in the rear. But I told him that how it feels isn't the whole story.......shift rpm fallback/recovery is more important than having a ridiculous 16-1 overall first gear ratio. Looking for advice. Thanks.

Car with the 3.90 gear has gone 11.60@116 with a 1.60 60ft best. Others are claiming three to four tenths faster at same weight with same engine mods.

11-02-2015, 03:56 AM	#1
casrak7 Junior Member Join Date: Jul 2011 Posts: 63 Likes: 0 Liked 3 Times in 2 Posts	Gear and converter for 2011 Coyote Mustang For a max effort street car.........Im aware that a 3.15-3.30 rear gear is more optimum for overall first gear ratio, since the trans has a 4.17 first gear........But I believe 2nd gear in the trans is around a 2.5.......making 2nd gear similar to first gear in a normal 3 speed auto car. Any hints on gearing these cars? converter hints? Friends car currently has far too much overall first gear in it due to the 3.90 rear gear. He has a Circle D 4500 lock up converter. He tells me that the car didnt feel faster with the 3.31 gear in the rear. But I told him that how it feels isn't the whole story.......shift rpm fallback/recovery is more important than having a ridiculous 16-1 overall first gear ratio. Looking for advice. Thanks. Car with the 3.90 gear has gone 11.60@116 with a 1.60 60ft best. Others are claiming three to four tenths faster at same weight with same engine mods. Last edited by casrak7; 11-02-2015 at 03:59 AM.