gear change 4:10

[06F250powerstroke]

i was thinkin about swaping out to 4:10's what axels would be in my truck also where should i buy them? I have heard about 4:30's are they a better choice?

[RescueF250]

You have 35's 4.10 will be a better match, you dont need 4.30's until you hit 37's or bigger. 10.25 and 10.50 are pretty much the same axle, you can go to Ford and ask them or read the labels on your axle.

[swamp_ratt]

you have the 10.50. the 10.25 was 80 something to 1997. then they switched it to 10.50. your front should be a dana 60. from my understanding the 1999-2003 or 2004 f250s had the dana 50 then they went to the dana 60 after!

[swamp_ratt]

oh and for gears go to ringpinion.com... and yer rear is called a Sterling 10.50 but its under fords on ringpinion.com

[jetjock15]

do you tow? what size tires.... if you tow, i disagree with Rescue... i have had 4 superduties and towed with all.... a superduty should come with 4.30s factory, and some do...... with anything bigger then stock tires 4.30s will work.... 35s -37s - 4.56, above that 4.88s and 5.13s... ive had 4.56 on my last 4 superduties and wish i would have went with 4.88s, but they were all 38 inch tires... i run 37 now with 4.56 and it works good.... but i tow, 90 percent of time... thats why i have a superduty... if you are going to re-gear, put in the time and money, 4.10s would be a waste, you would not even notice a difference.......

[PGreenSVT]

If you are not towing much or often the 4.10's and 35" tires isn't a bad combination. A lot of the guys that tow any weight have 4.30's with 33" tires so I don't think stepping up to a 4.30 would hurt you any. The difference between 3.73's and 4.10's doesn't justify the cost of changing out the gears unless differentials are trashed and you have to rebuild or replace them anyway.

[smokersteve]

If I change my ring and pinion can I use the same axel? I have 3.75

[PGreenSVT]

Originally Posted by smokersteve

If I change my ring and pinion can I use the same axel? I have 3.75

You have 3.73's and yes the axles don't change unless you install an upgraded differential with a higher spline count.

[Pitcher]

I don't think it would make much difference at all with 35" tires. I recently went to 4.56 only because my 5er weighs 12K, it towed it alright even with the 3.73's and the 38" tires. I don't even know that you would notice a difference with 4.10 unless you were towing extremely heavy loads.

[smokersteve]

Originally Posted by PGreenSVT

You have 3.73's and yes the axles don't change unless you install an upgraded differential with a higher spline count.

Is 4.10 the larges I can put in my axel?