bbslovr69

Just received my truck yesterday after waiting 3 weeks in the shop. Not because it took that long to do the work, but because parts were still coming in.

Its a 2001 Screw 4x4 5.4L. 33" mud tires on 20's. I was originally going to install 4.11's as I had read everywhere it was a good choice...boy am I glad I went with 4.56's and Truetracs for both front and rear differentials!

So for anyone undecided on what gears to go with I fully recommend 4.56's

Pros: Shaved a full second from 0-60, Can break tires loose from dead stop, Way more torque, Will put a smile on your face every time.

Cons: Bad fuel mileage on highway, High RPMS at highway speeds.

Here are some before and after Pics/Vids:


Before:





After:

jferg92

Nice write up and review. What exact tire size do you have ?

bbslovr69

Thank you. They are 33x12.50 R20 Federal Couragia MT

jprevat

iTrader: (1)

Thats actally a lot better than I thought they would be. 500 rpms isnt bad at all.

jferg92

Interesting, I was going to go with 4:10s with either 305/70/17s or 305/55/20s later on but I'll have my supercharger on by then. Maybe I should rethink things

bbslovr69

Yea, I'm really happy with the results. With how heavy these trucks are, those gears make it feel light on the gas.

jferg92

let me know how the highway Mpgs are

bbslovr69

I'm afraid MPG's will vary from user to user, as I tend to have a very heavy foot. I will try my best to give you some rough estimates.

Before the swap I was getting around 12-13 on the highway. So I can imagine I lost about 2mps.

I really don't care too much about mpgs at this point, since I knew what I was getting myself into from the beginning.

jstockert

What did you use to correct speedo?

Scuba_Dave

He has an Edge CTS Tuner installed