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Discussion Starter · #1 ·
I'd like to hear the results.
 

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KTM Rider
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Don't mean to hi-jack, but is anyone making them for the 05 CTD 4x4 front and rear?
 

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5 Years... 6 Dodges
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Not real sure why you'd want that low of gears on that... unless you have really big tires.
 

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I'm Not A Post Whore! :(
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they're GREAT I can look at a hill in overdrive and not shiver from fear!

and, on the 05 CTD, the front end uses same 4.56's as the dodge 1500's and what's in my front end, and the rear end is the same gears out of the CHevrolet's with Duramax, same axle
 

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Chauncy, did you run your 38" tires with the stock 3.73's for any prolonged amount of time? Reason I ask is I am getting some 315/70/17 put on in the next couple of days and would like to know if I will be undergeared or if just keeping OD off until on the highway will be my best approach. I would also like more information on exactly where you bought your gears, part numbers, and any other parts necessary for the swap. Thank you - Kyle
 

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Bubba_Hemi said:
Not real sure why you'd want that low of gears on that... unless you have really big tires.
Exactly! Truck will be getting 37's slapped on it soon. I ordered the truck with 4.10's just in case I wasn't able to find anything like 4.56's. At least the 4.10's would be far better than the 3.73's.
 

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Chauncy said:
and, on the 05 CTD, the front end uses same 4.56's as the dodge 1500's and what's in my front end, and the rear end is the same gears out of the CHevrolet's with Duramax, same axle
Whoaa, I din't know that. Good info!
 

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Even with 37s I think the 4.10s would be enough.
 

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Bubba_Hemi said:
Even with 37s I think the 4.10s would be enough.
You think wrong!
 

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i think he thinks you think you are wrong in thinking 4.10 gears are good for 37s. see the problem here is too many people are doing to much thinking and not enough doing
 

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On my lifted 1500 Hemi I was running 37's with 3.92's and I never upgraded gears, and it was beggin for it. This is my first Diesel and I'm not sure what to expect with the 37"/4.10 combo. But I ordered it that way just in case 4.10's were OKAY...at least for awhile anyway.

Crap! Has this thread been hi-jacked?
 

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I'm Not A Post Whore! :(
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no, it hasn't

diesels and gas engines are two different beasts
4.10's and 37's should be in the realm of perfectly fine

37's and 4.10's on a diesel is NO WHERE near the same as hemi 3.92's and 37's
 

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That's why I said 4.10s would be fine with the 37's... cause it's on a CTD.

On a gasser, yes it'd be good to upgrade, but it'll be fine on a CTD as it makes all it's power in the lower RPM range.
 

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Discussion Starter · #15 ·
So compare the 4.10 gears you had with stock tires to the 38" tires and 4.56. Does it feel the same?
 

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Discussion Starter · #17 ·
Bubba_Hemi said:
He never had 4.10s... he had 3.73s.
oh that sucks. I'm trying to find out what 4.56 and 35" would be like. When I had stock tires and my 4.10 gears ajust a tad lower would have been perfect, like maybe a 4.30. Now with the bigger tires I need better gears.
 

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Yea, I wish my Hemi had the 4.10s... that probably would have solved a lot of my issues thar I had with it.

Josh, I'd say give Chad a call up at Randy's and get a set... :) Too bad he doesn't give me a part of the commision. :(
 

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Discussion Starter · #19 ·
I'm thinking 4.88 would be best.
 

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4.88s will be awhile still I think... but I wouldn't go 4.88s unless you plan on lifting it and putting bigger tires on.

33's with 4.11s is 2720 RPMs
35's with 4.11s is 2565 RPMs
35's with 4.56s is 2845 RPMs
35's with 4.88s is 3045 RPMs
 
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