Fatboy option
Cargo Master
Joined: Feb 2004
Posts: 2,101
Likes: 60
From: N. Illinois
It was the Class 4 wide track front axle option offered on dually F350's in 2008-2009, if I recall. Not a big seller. The Ford F450 offers the same. Cut turning radius down like 5 feet. I doubt you'll see it. The current F350 probably offers the same the Fat Boy offered 8 years ago.
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More Turbo
Joined: Jun 2017
Posts: 602
Likes: 2
It was the Class 4 wide track front axle option offered on dually F350's in 2008-2009, if I recall. Not a big seller. The Ford F450 offers the same. Cut turning radius down like 5 feet. I doubt you'll see it. The current F350 probably offers the same the Fat Boy offered 8 years ago.
I custom ordered my truck and the only option I was missing is this one. I prefer the 3.55 and 17 inch wheel and better payload of the f350. Only thing I do not like is the turning radius.
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
It’s called the sidetrack axle and not available on the F350 dually anymore, only the F450 now. A big reason to go 450,but then you get the 19.5” wheels and tires and the higher axle ratios. I believe 450 only down to 4.30 axles, whereas 350 can go lower in the diesel, ie 3.55,3.73, 4.10s.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
Okay just so everyone understands it is called "Wide Track" not fatboy or sidetrack. The option was part of the Tow boss package which was discontinued unfortunately. The F450 retains the wide axle.
Fleet Mechanic
Joined: Apr 2015
Posts: 1,641
Likes: 507
From: Phelan CA
What's confusing is if you go onto Fordparts, and look for front axle housings (part 3010), you will find three options for the 2017+: Narrow track, HD Wide Track, and ''Fatboy'' Wide track.
Now, not much is stopping me from ordering the Fatboy housing, except no one at Ford seems to be able to verify if it is actually the wide track axle with the standard sized inner Cs.
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