ok i just installed the new nitto trail grapplers on my 06 crew cab 4x4 the size i went with is 295 70 17. the question i have is do i need to worry about my automatic transmission i dont hot rod around i just take it easy on the truck trying to make it last along time so any input will be nice

 

If you drive it nice you shouldnt have to worry.

 

No worries if they were 22.5 maybe a little but your fine even with a little power!