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Old 08-03-2014, 11:41 PM   #31
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Maybe the 4" axle tube is why the later model trucks are spec'd to handle more rear axle weight than my 2003 model F250.

Not that it really matters to me. I'm not going to overload it with a medium size fifth wheel anyway.
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Old 08-04-2014, 01:08 PM   #32
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Maybe the 4" axle tube is why the later model trucks are spec'd to handle more rear axle weight than my 2003 model F250.

Not that it really matters to me. I'm not going to overload it with a medium size fifth wheel anyway.
I looked up parts for a 2001 F-350 on rockauto.com and they showed 4-1/16" U-Bolts on Duallys and 3-5/8" U-bolts on SRWs. they might not be right though (not their first time)

I'm with you.. I'm not going to over load my truck with a 26' TT, even though, I'l over in GVWR, my axle ratings are all under and GCWR is under. the 3.5" axle has lasted over 13 years and 211,000, so I'll be fine.
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Old 08-04-2014, 01:31 PM   #33
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One of the primary reasons for larger axle tubes is the increased power output of the engines. On acceleration the pinion gear tries to climb the ring gear (Why the front end comes up on take off.) and that rotational force gets transmitted through the axle tubes to the spring perches.

Larger axle tubes allows for larger perches and more contact area to weld thus vastly increasing strength. When power started taking off early in the 2000's the need for stronger parts to handle that power came forward. Payload and towing increases followed suit.
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Old 08-04-2014, 01:44 PM   #34
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My TV is an '04 GMC with Duramax and Allison (90k miles). The drivetrain is all stock and I see no need to change that. The only thing I wish to be different with my truck is a quieter engine like the newer ones...but I sure as hell ain't gonna spend $30k (roughly the difference between value of mine and a new one) for a quieter engine.
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Old 08-19-2014, 06:11 PM   #35
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One way to quiet it down is install a lift pump as the CP3 will not work as hard and the injectors will love it also, all lb7's really need it

semt from my s4 mini
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Old 08-19-2014, 06:43 PM   #36
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2012 F350 6.7 PSD. No mods or add ons. It runs and pulls perfectly. Would rather spend the money on camping and traveling. I did buy a window shade for it if that counts.
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Old 08-23-2014, 08:13 AM   #37
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Old 08-23-2014, 03:21 PM   #38
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^^^ NIce , buddy at work has the exact same truck and he made 855hp on fuel and outran another coworkers 1200 bored bandit motorcycle, when he sprayed. They had a bet and our ramp at work is pretty big.
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Old 08-23-2014, 03:51 PM   #39
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^^^ NIce , buddy at work has the exact same truck and he made 855hp on fuel and outran another coworkers 1200 bored bandit motorcycle, when he sprayed. They had a bet and our ramp at work is pretty big.
I'm a former 1250S Bandit owner...fast bike, impressive that a 7K truck dragged that *****!
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Old 08-23-2014, 04:22 PM   #40
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Randys bandit has 130k since he bought it new, he knows how to ride fast and was taken by suprise

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