You will have crazy acceleration and a top speed of like 80 mph lol.

 

Look at the rear axle just inside of the tires. There should be a sticker there that has the ratio. The sticker in the glove box may have come off.

 

Lol!!!!!!

 

You got half of that right... Mine is a 2wdr and has 31.5" tall tires with 4.56's gears... Acceleration with them is just fun to say the least, but you are a little off with the top speed estimate there...

 

Question, what rpm are you turning at 65 mph?

 

I went with Motives. I originally ordered Yukon 4.11s but Moes was out of them, so I got the Motives instead. I had a local shop install them for about $350.

At 65, I am turning around 1900 rpms, where before I was turning 1500 rpms, so not that big of a difference.

 

Its funny, the rpms are really not that high but thats almost a 30% increase in rpms.

 

So sue me. Had to exagerate a little bit just to scare them...;D What is your top speed anyway? And rpms are they at?

 

Before the gears with the stock 3.92's at 65mph i was sitting right about 1900rpm with the 4.56's its right at the 2200rpm mark.

 

But whats was your top speed on the dyno?