07fx2

My f150 has 4.11s and my rpm stay around 2100 with a custom tune. It's a 4 speed.

What was said after that was irrelevant

Quyonmob

How did a tune change rpm? No TCC lock-up before?

kretty

iTrader: (1)

3.23's here. i turn around 1800rpm at 65mph. I cant imagine how 4.11's would feel on a hwy punch... Mine takes off pretty well as it is. Whats the top speed people are seeing from 4.11's?

Quyonmob

Run out of power due to aero before gearing being the top speed limit.

Say a 4l60E, 4.11, 31" tire... 186mph @5800rpm.

GMCtrk

iTrader: (27)

I would not run any higher (numerically lower) than 4.10s N/A

03sierraslt

iTrader: (22)

Did you not have converter lockup prior to the tune or what? Gearing is a mechanical function, other then converter lockup the tune has no effect on final gearing.

sleeperlqx

iTrader: (3)

Well so far in leaning to my 3.73s cause I know for a fact that they skatt quickly. I'm thinking I'm going to do a 3400 stall for the city and have it built extremely tight. My wheel combo is barely a 30" or is and that's how my tune is going to set appropriately.

sleeperlqx

iTrader: (3)

I will have a set of 4.88s up for sale shortly for someone who has or wants monster tires. Anxious to regain my top end cruise power as well.

brandon6.0

iTrader: (26)

i would do 4.10s. I had 3.73s when i switched from 60e to 80e. It was a turd out of the hole to me. The 80e has a longer first gear ratio. With 4.10s it should make it about perfect. I currently run 4.56s with mine and love em. But traction sucks on the street so i am about to swap over to 4.10s my self.

07fx2

You know what I forgot about my speedo being off... So I think I was going faster then what I normally do so that's why the rpms was higher. Ignore what I said.

By the way the low end you'll get with the 4.11 is amazing. I wish I went with them sooner. Was gonna go with 4.30s but since I'm supercharging I need all the traction I can get. :3