General QuestionsGeneral questions related to 1999-2007 Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.
For all the dually pickups that are on topic in this forum, 3.73 open axle was standard since the first SuperDuty was produced in January, 1998 as an "early" '99 model. 4.10 with limited slip was available at extra cost. Because the 4.10 was the only way to get limited slip until recently, most duallys have the 4.10 limited-slip rear end.
Beginning in the middle of the 2005 model year, Ford made available the "Tow Boss" pkg which includes 4.30 rear end with limited slip.
So although most '99 through '07 F-350 DRWs with diesel engines probably have 4.10 rear ends, some have 3.73 and some have 4.30.
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My Sierra Blanca is a '99.5 PSD CrewCab hot-rod Towing Machine! BTS tranny; TurboRamAir intake and 4" stainless turbo-back exhaust; DP-Tuner tunes flashed into an Edge Evolution tuner; ISSPRO EV gauges and TTM; AIC; SP-Diesel exhaust brake and torque converter controller. I special-ordered it new and plan to drive it until it quits.
Last edited by SmokeyWren : 08-19-2008 at 03:33 PM.
Reason: typo
My truck has 3.73:1 and as Smokey says has open differential. Ordered mine in March '99 and took delivery in May '99. Order sheet offered 3.73, 4.10, and 4.30 with LS an option on the latter two ratios.
Never understood, nor got a good explanation why Ford did not offer LS in the 3.73. Instead of a $200 option, you'll spend more than $1000 to put an Auburn or Detroit in your Dana 80.
Can only assume some Cone Head MBA in Marketing or Product Planning decided LS wasn't needed with 3.73.
Seems a lot of the 3.73 SRW are limited slip. Mine is and at 80K or so it sitll works very well. Will hook up on dry pavement though I only tested this theory once. Pulling up the boat ramp one wheel will start to spin then both hook up and at times spin them both. Other times it will alternate slipping one then the other but eventually hook up both.
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2003 7.3 F250 SD SRW Auto DIY intake 285/70 1.5" Leveling Kit TS Performance 75 HP Chip
The SRW and DRW trucks use two completely different axles - I cant exactly remember the details so I hope someone more knowledgeable will step up to the plate. I think the SRW trucks use a FORD axle, while the DRW trucks use a Dana (or something along those lines).
my '96 is unfortunately a 4:10, freakin ridiculous running 2500 rpm @ 70 mph. I wish I would have bought the auto & 3:73's, or a 4 wheel drive with the 5 speed and 3:73's [then I could have a real low gear]. But what the heck, I have lived with it this long...
The engineer that designed this 5 speed hopefully was fired and is now living under a bridge somewhere.
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'96 F350,Dually,CC,5 spd.,stock.
'02 Ex,Limited,stock
B100 baby! Bring it home, to the American farmers!
I used to run 70 or 80 mph with my 4.10 ls automatic when I wasn't towing, but with fuel costs what they are now, I stick to 55 mph whether I am towing or not.
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2001 F350 XLT 4X4, shift on the fly, 38 gal fuel tank, running boards, sliding rear window, black, crew cab, long bed, 4.10, automatic transmission, 11,500 gvwr, 20,000 gcwr, 7500 gvw, dual rear wheels, 7.3l turbo diesel, completely stock, 114,00 miles when purchased, now has 125,000 miles, repairs so far: starter, batteries, cps.
2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.
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1997 F350 4door 2wd long bed white 7.3L Powerstroke, E4OD, C5 4:10LS diff 326K miles on org engine
Automatic Transmission Engineer 1988-2007
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