Another random question... - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 16 (permalink) Old 03-14-2008, 11:01 PM Thread Starter
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Another random question...

I put a 4" lift kit on last summer and 35" tires... I'd like to get the truck back to where it used to be in terms of "quickness..." It's not really bad at all with the 35's but it lost a little get-up-and-go... What is involved in changing over to say 4.10 gearing? Do I just buy the new ring and pinion and slap them in or is this one of those "if you change this, you have to change everything" kind of jobs? Also, would it be ok to go to 4.10 or is 4.30 a better choice to get my truck back closer to where it was pre-lift kit? Thanks for letting me pick your brains guys!

2001 PSD F250
Born 4/01 in KY USA,
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post #2 of 16 (permalink) Old 03-14-2008, 11:35 PM
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Re: Another random question...

Not sure on what to use for gearing, but changing gears yourself isnt an easy job. You need to know what your doing and buy install kits to get all the measurements right, or the new gears well prematurely wear out. This is the site I learned alot about redoing the gearing on my truck back to 3.73's.
http://www.differentials.com/install.html


Its not a bad job if you have the right equipment, it took me about 6 hours to do the rear axle for the first time, but the front axle I did not do, since I got an entire axle with 3.73 gears for cheaper than it would have been to change out the gearing(long story). If after reading those instruction you feel you can do it, than go for it, I did and mine has been good for a year and a half now, i checked it last year, everything was still good. 35K later, still going good.

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post #3 of 16 (permalink) Old 03-15-2008, 03:12 AM
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Re: Another random question...

If you are interested, bring your truck over, I will swap my 4:10 for your 3:73, and we will learn how to do it together. Ain't nothing but a step at a time. I ain't skeered. Mine is just 2WD though.




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post #4 of 16 (permalink) Old 03-15-2008, 06:20 AM
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Re: Another random question...

Why dont you add a DP chip? That would be easier and cheaper then a gear swap and you will have that get up and go you are looking for.
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post #5 of 16 (permalink) Old 03-15-2008, 05:00 PM
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Re: Another random question...

With a good chip like a DP Tuner you could keep your 3.73s & still run the 35s. John is running 37s with 3.73 & a DP Tuner. It might not be as good off the line as a truck with 4.10s but it will move just fine once it's rolling.

Or if you still want 4.10s I'll trade you your 3.73s for the 4.10s in my truck. Yes they will fit too.


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post #6 of 16 (permalink) Old 03-15-2008, 05:05 PM
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Re: Another random question...

I would'nt go 4.30's with 35's. I went 4.30's with 37's and its just about perfect. Gave me back the giddy up low end power I lost with the lift and tires. If you drive highway a lot, I would keep the 3.73's for mileage.
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post #7 of 16 (permalink) Old 03-15-2008, 08:53 PM
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Re: Another random question...

Quote:
Originally Posted by Arisley View Post
If you are interested, bring your truck over, I will swap my 4:10 for your 3:73, and we will learn how to do it together. Ain't nothing but a step at a time. I ain't skeered. Mine is just 2WD though.
I don't think he won't be able to use 4x4 unless he changes the front gears too.
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post #8 of 16 (permalink) Old 03-15-2008, 10:00 PM
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Re: Another random question...

4:30 would be steep for 35's
Matter a fact, 4:10s is to.......just throw a chip on her
I run 37's on 3:73, Ive had the stockers, 35s and 37s on 3:73........the 35s were fine, especialy with the chip

And i would recommend paying someone to do it for you, its finicky and can go wrong in a hurry and end up costing twice as much

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post #9 of 16 (permalink) Old 03-16-2008, 06:27 AM
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Re: Another random question...


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post #10 of 16 (permalink) Old 03-16-2008, 09:50 AM Thread Starter
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Re: Another random question...

Thanks for all the replies guys. I am planning on buying a DP tuner soon anyway, so maybe I'll hold off on making gear swaps... I do drive highway a lot too... I was just entertaining the idea after reading an article about how larger tires will throw off your gearing... I guess what I really wanted was to hear all your opinions on making the swap... And thanks for the offers to swap rear ends too...

2001 PSD F250
Born 4/01 in KY USA,
4x4, 3.73, Ext. Cab, Shortbox...
ITP RR, CCV, Tymar Intake, Airdog, DP tuner

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