more power..

[fishsticks]

you need gears not throttle body spacers.

x2

[MK-voy]

4.56 vs 4.10 ? for 33 or 35 inch tires

[djthumper]

4.56 will give you more torque

[HARDTRAILZ]

4.56 w either.

[fishsticks]

4.56 w either.

x2 and only because 4.88s aren't available for our front diffs.

[MK-voy]

4.56 it is, found some at Randy's yukon brand what do you think?

[navigator]

for the 4.56 does it matter if you spend a lot of time on the interstate with 33's?
according to the chart below I am usually around 2500 rpm at 65mph, with 33s and 4.56 gears that would be over 3k rpm.
I'f I am running 75 on the interstate I would expect it to turn up a good bit of RPMs.
http://www.4wheelparts.com/aux_incl/gear_ratio.html

[HARDTRAILZ]

Chart doesnt apply as well since we have overdrive.

[navigator]

thanks Kyle, I was thinking that I was closer to 2k rpm than 2500.

[fishsticks]

Also, while the motor is spinning faster, the throttle load is much lighter.

[Trail X]

But - the less throttle load, the less efficient the engine is.

[MK-voy]