Why not 3.90s???

[blueovalguy]

Well 390 vs 373/410 you have to customize to get in and work. Most shop don't even know how to install a simple Ford Racing gear let a lone a 390.

I'm gettin a 390 as my next gear but its going to come with the 9inch i order. My friend talked me out of gettin the 390 just because of the fact its not a easy bolt-on.

There is no more problem installing 3:90s as there is with any other gear.

Unless they've changed, they don't make a 3:90 for a 9" rear, it's a 3:89.

 

[GTvert01]

At least 4.10s

 

[jbrown]

A ford mechanic told me they dont make 3.90's for the 8.8 rear end just for the 9 rear end. But I've seen them advertised (the 3.90's) Maybe when he said they didnt make them for the 8.8 he meant ford didnt make them

 

[jbrown]

A ford mechanic told me they dont make 3.90's for the 8.8 rear end just for the 9 rear end. But I've seen them advertised (the 3.90's) Maybe when he said they didnt make them for the 8.8 he meant ford didnt make them

 

[Dark Knight GT]

Ford does indeed not make a 3.90 gear for the 8.8 rear. There are other companies that do though like Motive gear(I think), Pro5.0, and Richmond gear.

I have to agree with the others. If you're going to bother putting gears in the rear, go with 4.10's instead. I'm running 4.30's and my car is a daily driver. I love them and have no problems with them. If it wasn't for fear of running out of gear at the track in 3rd, I'de be running 4.56's without question.