3.90 gears- anyone try em' ???

[MARS]

Hi, don't lose your time and money on 373, go for a 4.10, I have the 5.4 and it had the 3.55 and I made the move to the 4.10 never regretted it, motor isn't laboring anymore fuel Wise it's about the same if not lower, you won't regret it especially if you can do the labor on it

 

[Canadian Expy]

You can do a 4:10 and a little larger tire,
The Edge programmer I put on made a great difference in holding shifts and OD lock-up even pulling a 18" boat and 35" tires. That was before the 4:56 gears.
I'll though I do have a 5.4.