Well I'm thinking 4:30 only because I don't need to tow 24K, only about 20-21K. <O</OMy rolling 5 star hotel that I just ordered will weigh in around 16-17K. 4:30's will give me a little better mileage. Also everything I have read stated that the 450 with 4:88 will have the detuned engine. I realize I'll open up a can of warms with this, but I am hoping that the 4:30 option will not be detune. (Fingers crossed), but with out having a brochure that states the towing ratings (as well as the power ratings) I've just waiting to order the truck..
Then I'll place the order for the JJ running boards, gearvendor overdrive, etc..

 

Originally the F450 was detuned, now I saw 4.88 I really don't think you would miss the power.

 

Well from another post someone displayed the brochure that specificaly stated that thedetuning was on the 450 with 4:88 rear end. Said nothing about the 4:30's. So I'm really really really really really really really really hoping that the 4:30 will have all its power, but if not then I'll get the 4:88's. The gearvendor overdrive will make up the difference in mileage. Not to mention it will be nice to be able to split gears as needed with the 6 speed manual...
Know if I can only get the air break sound....

 

you can, roll your window down and make it

 

forget the air brake sound, go for the Jake brake at 3 AM in a quiet neighborhood

 

What are your reasons for the 4:88? More power? How much mpg difference do you think it will make. I was thinking of the 4:88 and then adding the aftermarket under over for when I don't need the power and want the fuel mileage to be higher. Then I read something about that voiding the warranty. What are you guys thoughts about it.

 

I am looking into the same thing. I have been looking at the gear vendor unit.
It looks like it is used on several OEM products. I don't know if it voids any warranty.
Here is the link if your interested:
http://www.gearvendors.com/index.html

 

Now we're talking...

 

Wow 4.88's.......I have to ask..

What are you towing with this new truck?

 

I would guess, anything he feels like

 

Anything I like Thats funny.
Actually getting the 4.88 option opened up my possibilities

 

Now thats FUNNY

Curiosity has got me on this so I guess I should word the question differently...What do you currently tow with your current truck that makes it necessary for a 4.88 gear ratio in your new truck?

 

You'll need a NOT FOR HIRE sign on the rear doors!

 

Actually I don't have a truck now. But I am looking at Fifth wheels now

 

Personally, at this point I tow a Cedar Creek 362BTS about 14,000# dry weight and a 2200# pin weight.......Not even close to the F450 capacity, However, we're looking at a Teton! That will be a whole lot closer to 4600# pin weight and 17,900# dry weight, which puts us in the area of the F450.
Either way, just about anything we'd care to tow will be handled with safety and ease.