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Feedback from people that have installed the streetmaxr 65.5 turbo and 37" tires. I am looking for feedback from people that have installed the streetmaxr 65.5 turbo and are running 37' tires on their truck. When driving around 50 to 55mph area does your truck shift into 6th gear? If so does...

I have a friend of mine that got the check coolant additive message on his dash and thought it meant the antifreeze level was low. So he added water to the antifreeze resevoir but the message stayed on. So then he went into napa gave the worker all the information for his 6.7 and the dude gave...

I can't decide between 4.11s or 4.30s gears for my 2013 f250. I am running 37s with a 7inch lift doing alot of driving a mixture of alot interstate,highway, and city driving with a good bit of towing. I usually drive 80 to 85 on the interstate and about 60 to 65 on the highway. I have read some...

I can't decide between 4.11s or 4.30s gears for my 2013 f250. I am running 37s with a 7inch lift doing alot of driving a mixture of alot interstate,highway, and city driving with a good bit of towing. I usually drive 80 to 85 on the interstate and about 60 to 65 on the highway. I have read some...