Just trying to find out all differences between the single rear wheel and dual rear wheel 1999 F350.

I know the rear end is different, but don't know exactly how. Any help is appreciated.

Jason

 

What do you mean? It's rather obvious, it's a completely different axle. What specifically do you want to know?

 

What rear end is in the SRW and what rear end is in the DRW (ratio, lsd)? What are the capacity differences? Are there any other differences in the truck besides the rear end?

Jason

 

I have a 01 DRW and it has 4:10 gears (Sterling) the SRW has 3:73 gears (Dana)

Ray Baker had posted this before it has a lot of useful information in it

The vin # should tell the difference because the GVW is different
Try this
Positions 5 through 7 indicate vehicle line, series and body type.
F20 — F-250, Regular Cab, 4x2, single rear wheels
X20 — F-250, SuperCab, 4x2, single rear wheels
W20 — F-250, Crew Cab, 4x2, single rear wheels
F21 — F-250, Regular Cab, 4x4, single rear wheels
X21 — F-250, SuperCab, 4x4, single rear wheels
W21 — F-250, Crew Cab, 4x4, single rear wheels
F30 — F-350, Regular Cab, 4x2, single rear wheels
X30 — F-350, SuperCab, 4x2, single rear wheels
W30 — F-350, Crew Cab, 4x2, single rear wheels
F31 — F-350, Regular Cab, 4x4, single rear wheels
X31 — F-350, SuperCab, 4x4, single rear wheels
W31 — F-350, Crew Cab, 4x4, single rear wheels
F32 — F-350, Regular Cab, 4x2, dual rear wheels
X32 — F-350, SuperCab, 4x2, dual rear wheels
W32 — F-350, Crew Cab, 4x2, dual rear wheels
F33 — F-350, Regular Cab, 4x4, dual rear wheels
X33 — F-350, SuperCab, 4x4, dual rear wheels
W33 — F-350, Crew Cab, 4x4, dual rear wheels
F34 — F-350, Regular Cab (Chassis Cab), 4x2, single rear wheels
X34 — F-350, SuperCab (Chassis Cab), 4x2, single rear wheels
W34 — F-350, Crew Cab (Chassis Cab), 4x2, single rear wheels
F35 — F-350, Regular Cab (Chassis Cab), 4x4, single rear wheels
X35 — F-350, SuperCab (Chassis Cab), 4x4, single rear wheels
W35 — F-350, Crew Cab (Chassis Cab), 4x4, single rear wheels
F36 — F-350, Regular Cab (Chassis Cab), 4x2, dual rear wheels
X36 — F-350, SuperCab (Chassis Cab), 4x2, dual rear wheels
W36 — F-350, Crew Cab (Chassis Cab), 4x2, dual rear wheels
F37 — F-350, Regular Cab (Chassis Cab), 4x4, dual rear wheels
X37 — F-350, SuperCab (Chassis Cab), 4x4, dual rear wheels
W37 — F-350, Crew Cab (Chassis Cab), 4x4, dual rear wheels
F46 — F-450, Regular Cab (Chassis Cab), 4x2
W46 — F-450, Crew Cab (Chassis Cab), 4x2
W42 — F-450, Crew Cab (with box), 4x2, dual rear wheels
W43 — F-450, Crew Cab (with box), 4x4, dual rear wheels
F47 — F-450, Regular Cab (Chassis Cab), 4x4
W47 — F-450, Crew Cab (Chassis Cab), 4x4
F56 — F-550, Regular Cab (Chassis Cab), 4x2
W56 — F-550, Crew Cab (Chassis Cab), 4x2
F57 — F-550, Regular Cab (Chassis Cab), 4x4
X46 — F-450, SuperCab (Chassis Cab), 4x2
X47 — F-450, SuperCab (Chassis Cab), 4x4
X56 — F-550, SuperCab (Chassis Cab), 4x2
X57 — F-550, SuperCab (Chassis Cab), 4x4
W57 — F-550, Crew Cab, (Chassis Cab), 4x4

 

Some dually's came with 3.73, most came with 4.10 they are Dana 80 axles, and the SRW axles are the Sterling I think, and usually have 3.73 ratio.

 

I have a 3.73 non-LSD rear in my DRW. Pretty much standard equipment for DRW 4x4 auto trucks. The 4.10s and/or LSD was extra price options.

 

A little more


S= F350 SRW
W= F-350 DRW

The fourth VIN position is the vehicle brake type and GVWR code (all vehicles use hydraulic brakes).

S — 9,001-10,000 pounds GVWR with driver and front passenger air bags
W — 10,001-14,000 pounds GVWR with driver and front passenger air bags

Demensions are here https://www.fleet.ford.com/truckbbas...ty250_350.html

 

A D80 11.25 vs a sterling 10.25.
brakes and leaf springs, hubs tires and fenders.
I think that is about it.

 

So the rest is identical? On 4x4 is the front axle/brakes the same?

 

Probably with the exception of the dually wheel adapters, I think the rest is the same.

 

The front brake rotors are not be the same.
I am not sure about the rest.
why do you ask?

 

That is true on the rotors. Good catch. There are a few dually conversions around and he wants to make sure that he know the difference between a true dually and a "make beleive" dually. He and I discussed this through email. I suggested that he post it up here to get as much info as possible.

 

Thank you for the info everyone. I'm amazed at the depth of knowledge just looking around this site. I'll be sticking around for a while. The $20 to become a supporter is well worth it. Looking forward to getting to know everyone better.

Jason
Baltimore, MD

 

On that note Jason Welcome to FTE! Looking forward to getting to know you also. Feel free to ask any questions that you may have jump into any thread an give your input as well. Before you know it PMS will set in and we are really good at spending your money on mods.

 

[quote=bill11012;7883008]The front brake rotors are not be the same.[quote]

I am not sure about the rotors but the hub bearing is different. The studs are shorter on the dually then on the SRW. I know there were 3 different rotors, (Cale at BTS had this problem with my truck) but I am not sure if they were different between dually and SRW.