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4.10's in max trailering sierra cc

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Old 02-23-2011, 09:34 PM
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Pretty sure for 2011 the NHT 14 bolt is now std with 3.42 not the 3.73 it came with in 2010 and earlier
Old 02-23-2011, 11:49 PM
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Originally Posted by CDN SS
Pretty sure for 2011 the NHT 14 bolt is now std with 3.42 not the 3.73 it came with in 2010 and earlier
I don't mean to beat this to death.

Gm build and price sites still shows 3.73 with max package, if you select 3.42 or 3.08 you must delete the max option.
US and Cdn sites.
It is odd that he got 3.42 with nht. 3.42 not really a towing gear.
Old 02-24-2011, 09:09 AM
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For some reason when I was shopping for a new 2011truck in December ( ended up with new 2010) all the 2011 with NHT in dealer inventory had 3.42 ?? My 2011 order that I priced out was NT 3.42 as std ?????
Old 02-24-2011, 09:20 AM
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Easy enough to double-check what gears a GM truck was built with. Just take a gander at the option codes sticker in the glove box . . .

3.42 ratio = RPO "GU6"
3.73 ratio = RPO "GT4"
Old 02-24-2011, 12:44 PM
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Here is what mine says.

So anyone had the 4.10's?
Or know where to get some?
Attached Thumbnails 4.10's in max trailering sierra cc-parts-id.jpg  
Old 02-24-2011, 12:57 PM
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My Avalanche with the heavy duty towing package (including trailer brake controller) came with 3.42 gears, in fact it was the only option available when I ordered it in late 2009. I'm curious which size 14 bolt your truck has. I'm pretty sure mine is the smaller 9.5 inch 14 bolt. Try Ron's for gears.
Old 02-24-2011, 01:00 PM
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Originally Posted by BrutalSierra
Here is what mine says.

So anyone had the 4.10's?
Or know where to get some?
6.2, 4W Discs, 3.42 locker, NO NHT package.
Old 02-24-2011, 01:08 PM
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NHT is Max Trailering Package, available with and ONLY with the 3.73 rear gear. However, the towing package (not NHT Max Trailering Package) can be ordered on any truck, enabling the towing options as well as the 3.42.

Anyway, moving along: I have the NHT, so my factory rear is a 3.73, and I still have plenty of thrust despite the taller tires. I would think that with a 4.10 highway mileage would fall, maybe even lower than mine. Also, as somebody else pointed out, unless you are considering taller tires as well, your first gear would be rendered almost useless. Have you considered maybe 3.73s?

Last edited by rjwz28; 02-24-2011 at 02:19 PM.
Old 02-24-2011, 01:20 PM
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Originally Posted by rjwz28
NHT is Max Trailering Package, available with and ONLY with the 3.73 rear gear. However, the towing package (not NHT Max Trailering Package) can be ordered on any truck, enabling the towing options as well as the 3.42.

Anyway, moving along: I have the NHT, so my factory rear is a 3.73, and I still have plenty of thrust despite the taller tires. I would think that with a 4.10 highway mileage would fall, maybe even lower than mine. Also, as somebody else pointed out, unless you are consideriong taller tires as well, your first gear would be rendered almost useless. Have you considered maybe 3.73s?
I wanna go with 3.73s in my SD, but funds are too tight right now. Great compromise ratio with the 6L80E and 32-33" tires, IMO.
Old 02-24-2011, 02:27 PM
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Originally Posted by Lloyd-TX
I wanna go with 3.73s in my SD, but funds are too tight right now. Great compromise ratio with the 6L80E and 32-33" tires, IMO.
Yeah, my gear/trans/tire combo does seems to be pretty close to perfect; I never find my transmission hunting for gears, and I haven't yet found myself needing more torque (I'll always WANT more power and torque, but I haven't yet been disappointed by what the truck already has).


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