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Discussion Starter · #1 ·
Work truck that is. They finally got me something new, and waaaaay better than the Mack I was driving.

550 Cummins ISX
18 speed
3.91 gear ratio

Plenty of bells and whistles. It pulls like a dream.



 

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How many miles on it?? Our new trucks t work have isx 500's and 10 speeds and are gutless IMHO. The truck we took to Colorado are 550's and 18's an I wasn't impressed either. Just curious. But I'm sure, like you said it kills the mack
 

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Discussion Starter · #4 ·
How many miles on it?? Our new trucks t work have isx 500's and 10 speeds and are gutless IMHO. The truck we took to Colorado are 550's and 18's an I wasn't impressed either. Just curious. But I'm sure, like you said it kills the mack
It's at 2600 miles right now. I hauled a 290 Link Belt track hoe (115,000 lbs gross) at 70 mph with no problems.
 
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