I drove about 7k miles on my 35" tires with 3.55 gears with my 4.7.. The only thing that hurt was the price of gas at about 8mpg.. Now with the 4.56's I can get upwards of 15mpg on the highway and about 12 around town. Gears are a must, but nothing is going to happen to your tranny. That was a problem on the older trucks, but with a lot of the new trucks coming out with 20" wheels and bigger stock, the tranny's can take it without a problem. Have fun on your trip.

 

Bigger rims will put more ware on the tranny and rear end, its close to a difference of nothing, maybe a couple thousand life expectincy less, nothing to really worry about

 

^^^ I doubt even that much loss. Although it depends on care. If ur doing burnouts and driving like a maniac on large tires then maybe. but if you are sensible then you shouldn't have a problem.

 

Man, this site is awesome. Lots of different people helping other people out, how can you beat that!!! THANKS

 

DelawareDon thanks for the help but we go down 'bout 3 times a year so we're pretty familiar..

 

If your truck starts shifting up and down alot on the hiway just put it in tow/haul mode. Or take it out of overdrive depending on your set up.

 

WHY??

 

We'll made it home from my trip in one piece, RAM was awesome, love the sound on highway flying past the others. Only used tank and half going down. (519 miles) 19.3 mpg, cruising on 75 mph. get there some retard steals my antenna now I'm mad but can't do any thing but by a new. So I do, then wife goes to put gas and breaks Bully Gas door magnet now I'm pissed but I still love her. Coming back used the pedal the whoile way burned more gas (2 full tanks)but beat the Mustang before he slowed down going about 105 mph. Definitely will take it back for bike week