3.73s 2011 4x4?!?

[Goodinblack]

Whine in coast or light throttle?

 

[Zed 71]

I have an 09 yukon and i just put 3.73's in it. They still suck!! I had 3.42's before. The only difference i noticed is that it no longer switches between 5th and 6th. I would like to know what 4.10's feel like!!

Yeah that is not enough difference in gear ratio to notice. Are you going to switch to 4.10s?

 

[johnny t]

Both. Usually over 50 mph i can hear it. I just spoke to them again now and they are going to order OEM gears from the dealer and try it again.

---------- Post added at 06:05 PM ---------- Previous post was at 06:03 PM ----------

I'm not sure yet. I would like to get this first issue resolved. How do you like the 4.10's?

 

[MACHO]

Blazed, im sure you're planning this, but now that you got your AutoCal you may want to get your tune and try that first. Really will make a ton of difference.

 

[Blazed]

Blazed, im sure you're planning this, but now that you got your AutoCal you may want to get your tune and try that first. Really will make a ton of difference.

Yea I am macho but as much city driving as I do and as aggressively as I drive the 3.08s aren't for me.

 

[Zed 71]

How do you like the 4.10's?

I test drove a 4.10 and other Tahoe (not sure what the ratio was though) back to back. There was a noticeable difference which lead to my purchase. Seems like my mileage is a littler better than non 4.10s which others attributed to getting up to speed with less effort, 4 cylinder mode kicking on more often, and just being in the sweet spot power band wise. Keep in mind that I have the 4L60E tranny.

Have you tried a gear calculator to ensure you get the gearing you want for your tire size and expectations?

 

[Blazed]

I test drove a 4.10 and other Tahoe (not sure what the ratio was though) back to back. There was a noticeable difference which lead to my purchase. Seems like my mileage is a littler better than non 4.10s which others attributed to getting up to speed with less effort, 4 cylinder mode kicking on more often, and just being in the sweet spot power band wise. Keep in mind that I have the 4L60E tranny.

Have you tried a gear calculator to ensure you get the gearing you want for your tire size and expectations?

No I didn't know there was such a thing..

 

[Zed 71]

Try these calculators. Of course discuss with your installer and the manufacturer.

http://www.grimmjeeper.com/gears.html

http://www.differentials.com/technical-help/differential-gear-ratio-calculator

 

[Blazed]

I'll probably just go test drive all the different ratios