Most I saw were 3.73 but look around you can find a 4.10. good luck

 

Are you talking about a V10 Super Duty?? 4.10s were not an option unless it was a VAN or a 99 dually.

 

on the 05/6 4;10's are standard and 4:30's are about a $50.00 option'. it's 100% worth it for the 4:30 option. to regear is a very costly option later on

 

Get the 4:30 Rear. I did based on the feedback from this site and this baby just rocks - empty and towing an 8K trailer.

 

An advertisement in one of my January '06 magazines has a SuperDuty package of gears and setup parts "on sale" for $599. That doesn't include labor, usually about $300 for the rear and $450 for the front, and doesn't include oil and misc. seals for front Dana.
The $50 upgrade to the factory 4.30 is a bargain.

 

I agree the 4.30s are the way to go and that is the only thing I missed on my factory order and I have the 4.10s LS. I am going to go to a 65 series tire when I replace the factory Contis and that will give me the same gearing as 4.24 according to the calculators on Randy's Ring and Pinion site. My Fifth wheel sits just a tad high in the front now so the lower 65 series will help out there too.

The factory should offer 4.56 as an option to give a real difference for the guys that want to put taller tires on which is fine if you haul a standard trailer but does not work too well if you have a 5th wheel.

 

std 17 inch tires and 56's this motor becomes a o-my , ford should only offer 30's and 56's.

 

Something as simple as selecting the proper final drive gear ratio means so very very much with the performance of the V-10 in the Super Duty. Select the wrong ratio and you have an unhappy customer burned for life against ever buying another Ford SD, ESPECIALLY with that gashog, dead V-10. Whereas the guy specing 4.30's is tickeled to death with his V-10 and has nothing but praise for the performance and for the entire SD package, and will be a repeat buyer for Ford.

Much more thought should be considered in such a simple option.

Most of the diesels on the dealership lots around here have 3.73 final drive ratios. I wonder if the Diesels are just opposite of the V-10s where they don't like RPM's and 4.30 finals would wreck their performance and mileage?

 

My 95 F250 with the 7.3 PSD had 4.10s because they were available that year in SRW.

When I got my 2000 F350 7.3 PSD SRW I had to get the 3.73s

Guess what, even though the 95 was not inter-cooled and made less power than the 2000, it actually felt quicker but it was a lighter truck. It also got better mileage so I do think the rev happy 6.0 would like 4.10s. Once again the engineers screw up by not making them available on SRW pickups.

 

4wd "ESPECIALLY with that gashog, dead V-10."4wd
saying something like that down here can start a war. and sure makes you sound like one of those smoker lovers.
going back though my 42 years of working in dealerships on cars and big rigs, and history. a diesel is and has always been a very slow turning motor. gason the other hand always has been a high speed. not untill the advent of the small displacment high speed diesel did they start turning above 2300 rpm, heck some big diesels never even see 1000 rpm. the diesels now in small car and truck use. they turn around 4000 rpm mostly below that. so they can get away with higher gearing like 373's and lower in number=high ratio.
a gas motor on the other hand rev's high 5000 and higher rpm. so for top notch performace a lower ratio is needed. while car builders try to make a happy number to use in many cases we hot rod types find they are off. in the case of the v10 410's work but still lag behind the 430 option. myself and a few others have regeared and found 456 make them a unreal dodge, cheby killer. not that i was not able to roast all 6 hemi nuts around me with the old 410's it's now with 56's they totally stay away from me.
ford is just a tad behind in the ratios they offer. a psd with stock tires and 410 became a super truck. here with 456's my v10 is a animal tire smoking one. how you set your truck up and or use it goes back into what you need for gearing.
4wd please don't start the diesel thing down here. most all of have had them and say never again.

 

I was hoping you and maybe others with diesel AND gas SD experience would chime in, as I was wondering why all the 3.73 geared new diesel inventory.

Stand down Capt! I did not mean to start a war by comparing comments I have read on this site to other comments read by experienced operators. Just wondering out loud if final ratios are the key in getting sucessful operation out of both SD truck engine (D/G) options and if they aren't a bit opposite. And why all the dealership's new truck diesel inventory have the 3.73. I personally wouldn't consider a diesel powered pick-up, nor based on my experience, would I consider anything but 4.30 option final drive ratio (or maybe 4.56 if it becomes an option). -
And also Capt haven't you ever heard the old saying "never say never"?

 

yep have heard that. but when it comes to smokers.i do mean never.big time.

 

I'm pretty happy with the performance of my 2001 V10 with 3.73's... I never tow heavy, so take this with a grain of salt

The only thing I need really low gearing for is slow-speed - like chained up to a stump, pieces of concrete, boulders, trees, whatever - I like to work this thing ...

Of course, I just put it in 4 LOW, so I basically have 10.81's - 3.73*2.9

hee hee...

Anyway, get the 4.30's !!!!!!!! I would now that I know

 

It is kind of comical when you see the only 3.73s you could get in 05 were with a 5.4.

The V10 only came with 4.10s and 4.30s which are very close and yes I wish I would have went with 4.30s but my big CC is no dog , let me tell you that.

I can smoke my tires and I don't get beat in very many traffic light drags. Maybe I got lucky and got a quick V10 but my big gal can move out . I don't think I will ever do a gear swap unless my new Montana 5th wheel turns out to be too much for the 4.10s.

I hauled it home empty over some grades and the truck hauled it great but the Fiver was empty and only weighs 10000 pounds. It will weigh 12000 pounds when I am all loaded up and I will repeat my self once more, If I do a gear swap it will be with 4.56s,
not the too-close 4.30s and I think Ford should have offered 4.10s and 4.56s .

 

If you go with 4.30's is anything else different? Like the diff carrier size in the rear?

Or a different ring gear diameter in the front, meaning a stronger front-end?