3.42

jeez ain't that the truth....

 

New tires, $4,000 - $5200 depending if you get national discount or not... You NEED tires, so replace them with a smaller size after the originals are worn. Reman/rebuilt set of chunks, PD $2500 -rear $1900 then you have install costs.

 

I noticed when i drove 05 volvo with 3.55 and 465 hp. It gain speed uphill than 09 cascadia with 3.42 that has 455 hp

 

I always hated 3.42 in any trucks I drove that had it. I didn't give it a lot of thought when I bought my 2013 Silverado pickup, but it came with 3.42 also. I have no clue what is with the love fest between OEM's and 3.42. It sucked in the class 8 trucks I drove that had it, and it sucks in my pickup.

 

I love 3.70 on my mbn t600. Gains speed uphill and will hold on the same speed up hill. I just want to know if you can even gain good mpg on 3.70.

 

Is a Cummins ISX, 13spd and 3:42 rears a good setup?

 

I had one, and I didn't like it. Guess it depends on the application. I didn't have good results in terms of both pulling power or fuel economy. I found the same thing with a Chevy pickup that had 3.42 in it. I have come to the conclusion that 3.42 has to be one of the worse overall ratios around. But then again, it might be ok in some situations. I just haven't experienced one of those situations.

 

Depends on what your application is and how you drive it. But that is true with any reasonable drive train setup.

I have driven two different truck with that basic setup. One was an '04 with a 565 hp ISX, the other an '07 with a Volvo D12 455hp. Both got 7 mpg+ running over the road. Most of my loads are pretty light though.

 

I like my 3.42 so far. I just came out of a Mack with 3.55 11R22.5 tires 13spd to a 3.42 275R22.5 10spd and the rpm is exactly the same, 1500 @ 70. I don't like the 10spd, but that's a different story. So far, I'm satisfied with the pulling power I have, but I'm not a speed racer of the line either.

 

Tall rubber was 11R24.5.At least it always was for me. Every truck I ever owned had 10.00-22,tube in the old days,and then when we went tubeless,it was 11R 24.5 same height.
10.00-20 tube,11.22.5 tubeless was the short rubber.