Factory Hitch Classification
Fleet Mechanic
Joined: Jan 2005
Posts: 1,784
Likes: 8
From: Tomball, Tx
interesting....
if you have a 6.7, crew cab, srw, SHORT Bed you get the 2.5"
if you have a 6.7, crew cab, srw, LONG Bed you get the 3"
if you have a 6.7, crew cab, srw, SHORT Bed you get the 2.5"
if you have a 6.7, crew cab, srw, LONG Bed you get the 3"
Fleet Mechanic
Joined: Jan 2005
Posts: 1,784
Likes: 8
From: Tomball, Tx
I saw DRW Long bed Crew Cabs and SRW trucks that had hitch prep in the bed and a 2 1/2" receiver....I couldn't figure out the "rhyme or reason"
Hotshot
Joined: Apr 2013
Posts: 10,118
Likes: 650
From: NH
I've never seen a DRW truck without the 3" receiver, unless maybe it was a gas. That has been a constant since day 1.
Tuned
Joined: Jul 2009
Posts: 393
Likes: 18
From: Irving
The "class rating" is an SAE thing and officially stopped at Class IV. More information in Wikipedia article here. Having said that, Class V is a very commonly used term in the industry for "something bigger than IV" (imho) and goes up to pretty insane levels. I think the 3" receiver is new enough to not fit any classification, as well. I'm glad I have one and a ridiculously specced and priced WeighSafe hitch for it so I can just not think about anything but GCVWR. :-)
Tuned
Joined: Jul 2009
Posts: 393
Likes: 18
From: Irving
Just a wild stab here, but does the long wheelbase vs short change the default rear end ratio? If so, they might not put the 3" on the short box because in their prediction you could never need it....
Mountain Pass
Joined: Mar 2005
Posts: 244
Likes: 45
My truck is currently in transit so, I haven't taken delivery yet. F250 CC SB 4x4 diesel. I looked at the list of options in etis and it shows a class III hitch. I will be disappointed if this is the case. It will be the first thing to be changed out. I am expecting a class V hitch and never saw anything when ordering that stated the class of the hitch. If the class III hitch is on the truck, maybe it has something to do with tbe payload down grade. CA registration is all ready a rip off. I feel a class V III hitch on a super duty is a joke.
Fleet Mechanic
Joined: Jan 2005
Posts: 1,784
Likes: 8
From: Tomball, Tx
The 3.55 was the best (highway) gear I could find (on dealer lots).
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Hotshot
Joined: Oct 2015
Posts: 19,687
Likes: 12,812
From: Wyoming
I'm pretty sure that is not the case. My original order was entered incorrectly by my dealer and had the 3.31 rear end on it. I couldn't get the order changed so a new order was put in for 3.55.
Mountain Pass
Joined: Jun 2012
Posts: 244
Likes: 15
From: Silicon Valley, CA
3.31 is the default ratio for 18" wheels. 20" wheels or camper package (I think) puts you up to the 3.55 ratio. My 350 has 3.31.
Hotshot
Joined: Oct 2015
Posts: 19,687
Likes: 12,812
From: Wyoming
Ding! Ding! Ding! Camper Package is a correct answer. I had to add that package to my order to get 3.55. I stuck with the 18" AT tires.
Junior User
Joined: May 2017
Posts: 50
Likes: 0
You would need 2 inserts to go from a 3" to a 2".
New User
Joined: Oct 2008
Posts: 19
Likes: 0
With 20" wheels you essentially do have 3.31's. They are taller than the 18's which is why it's required to get 3.55's with 20's so they have the same final ratio. 3.55's with 18's is the only true deeper gear
