Interchangeability info on '99 F450 4x4 7.3D srw L3.73 rear end - Diesel Forum - TheDieselStop.com
'99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the '99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

 
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post #1 of 13 (permalink) Old 09-16-2018, 07:41 PM Thread Starter
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Interchangeability info on '99 F450 4x4 7.3D srw L3.73 rear end

Hey folks, Recently purchased this rig. Backed the trailer into a burm, put the pinion into the cage. I've opted to replace with a used one. Hoping to get some expert advise on years/models that will work. Specifically if 250's or 350's LS 3.73's in what years will fit? Thanks in advance..Bruce
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post #2 of 13 (permalink) Old 09-17-2018, 07:44 PM
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I'm pretty sure a rear axle from an F350 SRW won't fit on an F450. An F350 Dually axle may fit, but would affect the load capacity of the truck.

Similarly, an F250 axle wouldn't fit as all F250's are SRW.

First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
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post #3 of 13 (permalink) Old 09-18-2018, 08:48 AM
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Could there be a typo in the title? He's saying a 99 F450 with a SRW 3.73? I'm not aware of any F450s that came with a single rear axle, and none of them were 3.73 gear ratio.

If the OP has any Sterling 10.5 SRW, then any other Sterling 10.5 SRW will be a direct bolt in. There apparently were some different load capacities from different years / models, but the outside structure should be the same - probably all the way to 2007 and maybe further.

2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

I wonder if clouds ever look down on us and say, "Hey, look - that one is shaped like an idiot!"
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post #4 of 13 (permalink) Old 09-18-2018, 01:02 PM
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Quote:
Originally Posted by dliterider@gmail.com View Post
Hey folks, Recently purchased this rig. Backed the trailer into a burm, put the pinion into the cage. I've opted to replace with a used one. Hoping to get some expert advise on years/models that will work. Specifically if 250's or 350's LS 3.73's in what years will fit? Thanks in advance..Bruce
Did it come from the factory that way, or was it modified by the previous owner?

2001 F350 XLT 4X4 crew cab, dual rear wheels, long bed, black, 7.3l turbo diesel, automatic transmission, 4.10, shift on the fly, running boards, sliding rear window, 38 gal fuel tank, Odyssey extreme 65-PC1750T batteries, Michelin LTX-MS2 rear tires, Sumitomo Encounter front tires, Shell Rotella Ultra elc, 11,500 gvwr, 20,000 gcwr, 7500 gvw, completely stock, 114,000 miles when purchased, now has 240,000 miles, repairs so far: two starters, batteries, cps, brakes, tires, alternator, ball joints, locking hub, wheel hub, AC compressor, serpentine belt, power steering pump, driver's side window, ignition switch, o-ring, Spectra premium radiator, water pump, fan clutch, fan blades, thermostat, thermostat housing, tensioner. Stolen twice so far, but recovered both times with major damage.

2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.
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post #5 of 13 (permalink) Old 09-18-2018, 09:18 PM
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Could there be a typo in the title? He's saying a 99 F450 with a SRW 3.73? I'm not aware of any F450s that came with a single rear axle, and none of them were 3.73 gear ratio.

If the OP has any Sterling 10.5 SRW, then any other Sterling 10.5 SRW will be a direct bolt in. There apparently were some different load capacities from different years / models, but the outside structure should be the same - probably all the way to 2007 and maybe further.
I was wondering the same thing. But the OP hasn't been back yet to clarify.
You're right about the 10.5 SRW axle being a dime a dozen. Some differences in brake configuration on the real early stuff, but that's all bolt-on.

First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
'99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version
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post #6 of 13 (permalink) Old 09-18-2018, 09:53 PM
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Could there be a typo in the title? He's saying a 99 F450 with a SRW 3.73? I'm not aware of any F450s that came with a single rear axle, and none of them were 3.73 gear ratio.............
How many 99 F450 4x4's, with any differential you choose, have you seen?

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post #7 of 13 (permalink) Old 09-18-2018, 10:06 PM
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How many 99 F450 4x4's, with any differential you choose, have you seen?


Mainly bucket trucks, but they were all duallys with Dana axles. Here’s a few for sale if you want one - https://www.carsforsale.com/Search?M...Direction=Desc


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2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

I wonder if clouds ever look down on us and say, "Hey, look - that one is shaped like an idiot!"
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post #8 of 13 (permalink) Old 09-19-2018, 07:14 PM Thread Starter
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Ok. Got the info u added. I found a rear end from 04 f250 that will work until i get this one rebuilt. To answer ur question...this was a 8ft bed, and was cut off to make it a short bed. I got a good deal and love the truck...but it does have a few issues that I'll be working on. I appreciate the response, and will commit to updating my progress. Thanks...Bruce
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post #9 of 13 (permalink) Old 09-19-2018, 08:20 PM
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So we're all dying to know. Is the truck actually an F450 with SRW axle, or was that just a glitch in your post title?

First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
'99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version
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post #10 of 13 (permalink) Old 09-20-2018, 10:10 AM Thread Starter
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No...not that lucky. It was a utility dually produced in Wakarusa. But it's a short bed single now and I intend on keeping her. I appreciate the interest and help. I'll probably have some tech questions in the future. Thanx...Bruce
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post #11 of 13 (permalink) Old 09-20-2018, 12:31 PM
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I would be nice to know that actual rear end that is in it.

I doubt that a Sterling 10.5 that comes with the F250 & F350 will go into that truck without some work.

96 F250 PS XLT 4X4 long box, 5sp,4.10, manual hubs,pyro+boost guages, Dark Toumaline, add a leaf, Dale's TYMAR, and HX hose, downpipe, coolant filter, Luk clutch
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post #12 of 13 (permalink) Old 09-20-2018, 03:03 PM
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I would be nice to know that actual rear end that is in it.

I doubt that a Sterling 10.5 that comes with the F250 & F350 will go into that truck without some work.
Sounds to me as if the work has already been done, since the previous owner cut off the back part of the truck and welded on the back part of some SRW truck. We would have to know what truck he used as the donor for the short bed, SRW, 3.73. Probably whatever he used before would work again.

2001 F350 XLT 4X4 crew cab, dual rear wheels, long bed, black, 7.3l turbo diesel, automatic transmission, 4.10, shift on the fly, running boards, sliding rear window, 38 gal fuel tank, Odyssey extreme 65-PC1750T batteries, Michelin LTX-MS2 rear tires, Sumitomo Encounter front tires, Shell Rotella Ultra elc, 11,500 gvwr, 20,000 gcwr, 7500 gvw, completely stock, 114,000 miles when purchased, now has 240,000 miles, repairs so far: two starters, batteries, cps, brakes, tires, alternator, ball joints, locking hub, wheel hub, AC compressor, serpentine belt, power steering pump, driver's side window, ignition switch, o-ring, Spectra premium radiator, water pump, fan clutch, fan blades, thermostat, thermostat housing, tensioner. Stolen twice so far, but recovered both times with major damage.

2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.
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post #13 of 13 (permalink) Old 09-20-2018, 05:38 PM
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Frankentruck!!

2003 F-250 XLT Crew Cab 7.3L, Chrome BigTex Grille Guard, Quad pillar - 3 ISSPRO gauges (trans, pyro, boost) and DP-Tuner F6; Roush fuel pressure / temperature / oil pressure gauges, Ford Severe Duty AIS, 31 row 6.0 transmission cooler, ScanGauge II, Marinco mod, Walker BTM

I wonder if clouds ever look down on us and say, "Hey, look - that one is shaped like an idiot!"
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