2015 gm 2500hd

Hot COCOAL

May the farce be with you
Jun 9, 2012
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Well its a 15 ford which has the new turbo, bigger pump and injectors but still people don't realize how muxh gearing helps

Makes me think I should've put in 4.56 gears instead of 4.11:mad: does the ford run a larger tire dia then the chevy? 4.30 gears seem pretty steep on 32" tall tires

Oh well, makes me wonder what rpm the ford tach's at on the freeway at 70mph though?
 

duratothemax

<--- slippery roads
Aug 28, 2006
7,139
10
0
Wyoming
Yes they have always run a larger tire factory

not THAT much larger....

the gearing advantage that the Ford has is ridiculous. Its no surprise that the Ford beat the pants off the GM! Make it a fair contest (get a Ford with 3.73's) and THEN redo the race.

That F-350 probably sucks with 4.30's anyways. The fuel economy will be shit and the thing will be screaming on the highway.
 

Chevy1925

don't know sh!t about IFS
Staff member
Oct 21, 2009
21,638
5,778
113
Phoenix Az
Makes me think I should've put in 4.56 gears instead of 4.11:mad: does the ford run a larger tire dia then the chevy? 4.30 gears seem pretty steep on 32" tall tires

Oh well, makes me wonder what rpm the ford tach's at on the freeway at 70mph though?

no jason, they mpg would have been your gripe :D see below

That F-350 probably sucks with 4.30's anyways. The fuel economy will be shit and the thing will be screaming on the highway.
 

DIESELMAFIAPER.LB7

<----new hotness
Jan 17, 2010
5,163
12
38
idaho
shop.dieselmafiaperformance.com
not THAT much larger....

the gearing advantage that the Ford has is ridiculous. Its no surprise that the Ford beat the pants off the GM! Make it a fair contest (get a Ford with 3.73's) and THEN redo the race.

That F-350 probably sucks with 4.30's anyways. The fuel economy will be shit and the thing will be screaming on the highway.

Correct I just said there larger not there huge compared to the gms
 

chevyburnout1

Fixing it till it breaks
Aug 25, 2008
2,368
1
38
Berthoud, CO
I like it. Fits the new body style better. Like it's more "filled in". I thought I read they have an aluminum hood? Wonder how well that'll withstand hail?
 

Mike L.

Got Sheep?
Staff member
Vendor/Sponsor
Aug 12, 2006
15,681
232
63
Fullerton CA
I think 2016 is when the next round of EPA emissions changes comes about. But beyond that I dont really know.

So within the next 2 years we will see an "all new duramax" (as in, something that no longer shares any 6.6 Isuzu heritage), and most likely an all new Allison to go along with it.

I asked my Allison source if I should be looking at the 2014 and he told me to hold off till 2016. :D He is the same guy that told me what was coming at the end of 2010. So I'm going to wait.
 

Dozerboy

Well-known member
Jun 23, 2009
4,892
470
83
TX of course
I'm not sure I like all these LEDs on the headlights nowadays. Looks a little like euro trash to me. Trucks do look sharp though and the interior is beautiful.