Just installed 37 inchmud terrains and I need to know what number to tell tech at dealership for change. Also what do I have to ask for I think (pinion factor)? Also what should I expect to pay? Thanks much. check my gallery for new pics.

 

alltork,I have no idea as to the answers to these questions,but I have a question for you... How the heck to you keep all that droooool off of your truck??
Man,that is the hottest...I mean the coolest...I donno what I mean....pass the towel,my chin's gettin chapped! Thanks ,Mark.

 

Make sure you have the new tires revs/mile # so they can enter that number into the ecm.

 

They charged me $42.00 ( 1/2 hour labor ) you also need to know rear end ratio and trans, ( they try to make a big thing out of it)

You truck looks great!

 

alltork,

You will have to know the revs per mile before you go to the dealer. Get that from the tire manufacturer or The Tire rack.

Then go to the dealer and tell them you want them to reset your "pinion factor". Pull right up to the service manager's desk and leave it running. They may not know how to do it so stand by and menton that it only takes about three minutes with the DRB tool. When they say "what size tire do you have?" and then "that size is not in there", tell them him to go to "other" under "tire size", and plug in XXX revs per mile. Look over his shoulder. Did he get it right?
If they're cool they will do it no charge, as you wait and you'll be gone in a few minutes. If they try to set an appointment you'll get dinged an hour and have to come back another time. Some dealers don't get it or even know it can be done! Some will charge you a safe amount to cover them.
I went to about five dealers and got a different story at each one! Everything from "it cannot be done on those, it will be $85." (my personal favorite), to "that size cannot be entered" to "I'll set you up for a week from Thursday, it will be a couple of hours". Sheesh. Finally I acted like I knew what it was and a guy ran out and handled it no charge. One interesting note though: the first time with me watching and everything seeming fine, the speedo was way off and I had to go back. The second time I just told them I had it done the other day and it's wrong, so they did not try to charge me then either. Cool.
Or you could just get a callibrator and do it yourself. Best if you plan to change tire sizes often.
Let us know how it goes.

Wetspirit

 

Alltork, you have one of the nicest 3rd gens I've ever seen! Please post some pics with the new meats installed when you get a chance. Thanks!

 

They are in his gallery, accesible by the link under his name "Members Photo Gallery".

The 17inch rims are misleading, makes the tires look not that big.
Less sidewall than the same size on a 16 inch rim I guess.

Trucks like that make me dislike the 3rd gens less and less.


phox

 

Sorry 'bout that... I thought those were 35's in his gallery... you're right about the rim sizes making the tires look not so big... I'm from the old school of 15 and 16.5 inchers so all these new 17's and 18's on up make the tires look smaller than they actually are.

 

the BFG web site says that those 37x12.50 R17 are rotate at 565 revs per mile at 45 mph. Have your dealer punch in 565 revs and double check it when done, that should be really close.

My 315's called for 601 revs and as far as I can tell, it's perfect.

Chad

 

Thanks for all the info guys. I'll be going to dealership next tuesday will let you know what develops. I'm hoping they can figure it out. They are not the most mechanically gifted for a 5 star dealership. I think 5 star means they get up to 5 trys to get it fixed right.

 

ALLTORK.... awsome looking truck man..

On the 37's do you think they would fit with 5" suspension lift alone????

I dont want to loose the functionality of my front and rear tow bumpers, with the body lift.

Did you notice much drop in off the line acceleration or low end grunt? **** that truck looks sweet, exactly the tires i want but need the lift first to fit them.

 

Unless you are using the stock wheel (or almost exact dimensions) 37's will not fit with only a 4-5" lift. It is so close....but no.

 

cquestad is right about the 37s not fitting with just 5 inch lift. Even if you could shoehorn them in you'd never be able to go anywhere but on the highway. I still have enough room for a 38 but I got a deal on the 37s. Besides they ride so sweet anyway. Barret Fodder you said you didn't want to give up bumper towing, does your truck have the tow package with hitch because that isn't affected by bodylift. At least not in the rear I don't know what your front bumper is used for. Just put the 5 inch lift on and go with the 35s these trucks look sweet either way. My truck hasn't lost any performance that i know of, don't know gas mileage difference yet. I've got 4.10 gears and I think that helps.

 

Well i made a deal with a guy in dallas for a set of h2 wheels and tires for 500 bucks and will get them machined late next week. On my bumpers i have frame mounted towing bumpers with the hitch integrated into them from Ranchhand...they were part of the dealer demo package for their truck. I am gonna go with something mild on the lift either level kit or 3-4" lift. I am searching around right now to see what is available without burning a whole in my wallet. Thanks a mill to this sight and all the folks here for such good info and quick responses...

THIS SIGHT ROCKS

 

Tuff 4.5" is the best bang for your buck for a lift...look at my pics. Some people complain about Tuff's lifts, but I think they personally have never used them. I have run them on three trucks including both Dodge and Ford and have had great luck. Maintains stock ride, gives me the clearance needed, have always aligned perfectly, and did not break the bank.