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i want to put 40 inch tires on my truck i was just wondering what i need to do to my tranny or gearing to prolong the life of my truck i have a 03 2500 5.9l ho 4x4 crewcab longbox no major engine mods

i am not shure of the gearing will have to check it out when i get home i heard 4 10 is recomended for larger tires?
 

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even w/ 4;10's your going to need some engine mod's. IMO i'm running 38's and the mod's in my sig. and it's still not enough sometimes.:whip:
 

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nitro gear 5.13?
 

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Trying to learn
'03 QCLB 2500 305/555 NV5600 3.73 4x4
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I hope he got it figured out in the 11 years gone by.
 
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so do i
 
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