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Old Sep 16, 2004 | 06:47 PM
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4.10 gears

For any of you guys that have some of the newer SDs, do you notice much difference in getting the 4.10 gears versus the 3.73 in regards to mpg and ride quality? Seems worth it for the upgrade in tow capability, no? thanks!
 
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Old Sep 16, 2004 | 10:14 PM
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Most guys who tow like the 4.10's vs the 3.73...with stock tires.
 
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Old Sep 17, 2004 | 09:08 AM
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If you tow, the 4.10s are the way to go, alot easier pulling out from a dead stop then the 3.73s. If you aren't towing, the 3.73s would keep your rpms down at hiway speeds and give you a bit more mpgs. I run 4.10s and from seeing people post their mpgs, mine isn't off by much from theirs. From what I've read, the difference in the manual trannies between 3.73s and 4.10s is a bigger deal. The 4.10s give alot better performance.
 
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Old Sep 17, 2004 | 11:52 AM
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Originally Posted by sy5adm1n
If you tow, the 4.10s are the way to go, alot easier pulling out from a dead stop then the 3.73s. If you aren't towing, the 3.73s would keep your rpms down at hiway speeds and give you a bit more mpgs. I run 4.10s and from seeing people post their mpgs, mine isn't off by much from theirs. From what I've read, the difference in the manual trannies between 3.73s and 4.10s is a bigger deal. The 4.10s give alot better performance.
sy5admin, what kind of mpg do you get with yours vs "theirs" with the 3.73?
 
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Old Sep 17, 2004 | 12:03 PM
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Hey I was looking at an 05 350 PSD SRW 4x4. I was told I could not get one with 4:10 and that they all came with 3:73. This sounds wrong to me and I have seen conflicting info here about that. Can anyone put this issue to rest for me? I want to eventually put bigger tires on so the lower ratio is important to me.
 
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Old Sep 17, 2004 | 12:45 PM
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zombie, I get right around 18mpg with a lead foot and my mods. I can push it to 20mpg with a steady foot on a long trip. I still get 12-14mpg towing my fifth wheel.
dafuz, thats not right, the one up the street from me with the v-10 has 4.30s and the diesels all have 4.10s. At least thats whats posted on the stickers.
 
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Old Sep 17, 2004 | 01:57 PM
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sy5admin, that's not too shabby! What kind of mods do you have? Thanks for the input!
 
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Old Sep 17, 2004 | 02:00 PM
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I noticed you have a PSD in your profile. I'm thinking about the new 5.4L gasser. Any experience with the mpg there?
 
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Old Sep 17, 2004 | 02:33 PM
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Originally Posted by dafuz
Hey I was looking at an 05 350 PSD SRW 4x4. I was told I could not get one with 4:10 and that they all came with 3:73. This sounds wrong to me and I have seen conflicting info here about that. Can anyone put this issue to rest for me? I want to eventually put bigger tires on so the lower ratio is important to me.
In the SD you can get the following gear ratios:

5.4L - 3.73 Standard, 4.10 optional in some 2WD SRW applications and 4WD DRW applications.

6.8L V10 - 4.10 Standard, 4.30 optional

6.0L PSD - 3.73 Standard, 4.10 optional on DRW Only

Here is a link to the specifications on the FMC website:
http://www.fordvehicles.com/Trucks/s...eatures/specs/

These gear choices were the same for the 2003 & 2004 SD also (with the only exception that you could get 3.73 in the V10).

Hope this helps
 

Last edited by blackhat620; Sep 17, 2004 at 03:00 PM.
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Old Sep 17, 2004 | 02:42 PM
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Thank you BLACKHAT620! I guess they dont really need the low gears with the PSD
 
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