I upgraded my stock 3.55 gears to a set of Yukon 4.56's last November and have absolutely ZERO issues. Sounds like you may simply received a bad set, not sure why you didn't insist the shop order another set and install those. I mean had you ordered 4 new tires and one was bad would you have simply went back to the stock tires or insist on a replacement being sent?

 

I am happy with them, but I thought they would at least allow me to burn the tires from a stop. Even after the gear swap I can't get this thing to chirp the tires from a compete stop.
I am sorry for you and happy for me, you just saved me a ton of money.

 

I am happy with them, but I thought they would at least allow me to burn the tires from a stop. Even after the gear swap I can't get this thing to chirp the tires from a compete stop.
I am sorry for you and happy for me, you just saved me a ton of money.

 

How bad of a hit did you take at the pump?

 

Do you have the 5.4 or the 4.6? With the 5.4 you should be able to light them up...

 

He has the 4.6.

 

Yeah the 4.6. I have finally become content with the truck, but I really wish I got the 5.4 with 4x4. I guess I learned a huge lesson. Too bad I can't change for at least 5 years due to being upside down.

 

So I just sent Yukon Gear an Email asking if any of their components are manufactured in China. We'll see if I get a response. I'll let you all know.

 

And here is their answer:

"None of our parts are manufactured in China."

 

yep, it could be the gears are of bad quality, but 9/10 times, it is the person who does the install. very rarely is it actually the gearset. I've had a lot of cars with 4.10 and 4.11 gears and 0 issues. and despite what people tell you, GEAR WHINE IS NEVER NORMAL

on the other hand, I've heard bad things about Yukon gears from other Mustang/Camaro guys. most everybody uses Ford Racing or Richmond

a true-trac or a trac-loc LS or even a true detroit are actually fairly cheap...about $500


my 5.4 with 3.73 can spin the tires from a stop. it ain't a smokout, but there is definetaly tire spin and the squealing noise...I'm actually wanting to go to 4.56 or 4.88 gears in my truck. but it's gonna cost me about $2k for a shop to do it out here. hows that for expensive?

 

I think there is something else wrong with your truck then....i can burn my tires effortlessly with my 07 supercrew with a 5.4 and 3.73's.....


EDIT: i didn't read the 4.6 part.......as for gear howl i'm going to have to agree with a few in here that its almost never the gears....i've installed far more gearsets than i'd like to admit (95 F-150 blew up 3 rear end LS carriers and destroyed gears each time before i switched to an aftermarket carrier) as well as many gears in other vehicles....and the only time i've ever had gear noise is when they weren't set up perfectly - (off road only - didn't care).