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.
Went to change front diff fluid, ran truck with switch in 4x4 mode to warm up the fluid. I did not turn the front hubs. Went a mile or so down the road and turned the corner and the front end acted like it was in 4x4. Turned off the 4x4 switch and the same thing happened while turning. The only way I could get it to stop acting like this was to put the truck in nuetral for awhile and coast or to stop put the truck in park then back to drive and everything was fine...no tire scuffing/hoping while turning. I checked the hubs when I got back home and they WERE NOT in the lock position. What is happening? Not sure if this is part of the problem but the hubs are a little tough to turn into the lock position. But the way I understand it is the truck would only be in 4x4 if the hubs were in lock position and the switched turned to 4x4.
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2000 F250 SD 4x4 CC SB, 7.3L, 125,000 mi
Hutch Mod, Harpoon Mod, that's it!
Re: Acts like it's in 4 wheel drive, but it's not???
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You most likely have a problem with the vacuum to your hubs. When they're in Auto position, they are supposed to lock and unlock with a vacuum pulse when the switch is turned, but it's possible they are actually locked.
Running with the hubs locked and t-case unlocked will cause some mild effects similar to the "crow hop" that you get when in 4x4 on dry pavement.
Sounds like your hubs need servicing and the vacuum system checked out.
Re: Acts like it's in 4 wheel drive, but it's not???
Thanks for the reply. I'm sure it's time for servicing. Interesting that a vacuum pulse would lock and unlock the hubs depending on the position of the switch. Why would there even need to be a lock position on the hubs then? If they lock and unlock with the switch pulse seems like turning the hubs is unnessesary?
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2000 F250 SD 4x4 CC SB, 7.3L, 125,000 mi
Hutch Mod, Harpoon Mod, that's it!
Re: Acts like it's in 4 wheel drive, but it's not???
[ QUOTE ]
Thanks for the reply. I'm sure it's time for servicing. Interesting that a vacuum pulse would lock and unlock the hubs depending on the position of the switch. Why would there even need to be a lock position on the hubs then? If they lock and unlock with the switch pulse seems like turning the hubs is unnessesary?
[/ QUOTE ]
It's a back up for when the vacuum accuation doesn't work.
Wayne B
__________________ 2000 F-250 XLT PSD 4X4 ESOF Auto, SC, LB, Gauges, Mag-HyTech Trans Pan & Rear End Cover, <font color="red"> (((XM))) Inside</font>, ATV Racks w/ Two Kawasaki Prairie 400 4X4's sitting on them, 25' Rockwood TT. Ashburn, Va. Member # 103 Pictures
Re: Acts like it's in 4 wheel drive, but it's not???
[ QUOTE ]
[ QUOTE ]
Thanks for the reply. I'm sure it's time for servicing. Interesting that a vacuum pulse would lock and unlock the hubs depending on the position of the switch. Why would there even need to be a lock position on the hubs then? If they lock and unlock with the switch pulse seems like turning the hubs is unnessesary?
[/ QUOTE ]
It's a back up for when the vacuum accuation doesn't work.
Wayne B
[/ QUOTE ]
Which Ford knows is a requirement because of all the vacuum hub failures!
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2005 F-250 CC/SB 4X4, 6.0L PSD-Torqueshift
med wedgewood blue,towcommand,upfitter switches
5"procomp lift, 35"tires, 4.30 gears
BCP mod, LED taillights, 4"Banks exhaust, Harpooned fuel tank,
Accufab intake elbow, ARP Headstuds
Pioneer avic-D3 with backup cams and ipod
Re: Acts like it's in 4 wheel drive, but it's not???
Not a problem and nice to know your going to HAVE 4wd when you need it, (even if it means getting out of the truck) But if properly maintained, the vacume system is pretty dependable, contrary to what some on here feel. It doesn't show up here REALLY often as a failure. When it does, it can be a fairly inexpensive repair, though kind of labor intensive if you have to remove the WHOLE HUB to replace the inner seals.
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Jim T.*48* SLAPS Co-Founder, 30.8 yrs RETIRED UAW 6/01/06, Now a full time Technician in the MOANG 12/10/07 My pics! and my New'03 Dually pics!, Charcoal Grey, Black and Grey interior, Black leather seats, Van Turbo/ATS ported housing/WW, Quad "A" pillar pod with Carbon Fiber series AUTO METER Gauges, FUMOTO Valve. BTS BUBBA" /TS 4pos chip, 4" Turbo back straight pipe/stainless 5" tip 131st F/W St.Louis MoAirNatlGuard We're losing the F-15s. BUT BEING HANDED THE KEYS TO THE B-2 BOMBERS at WHITMAN AFB, Near Kansas City, MO.!! We are Lindburghs OWN! Suffering from *PMS,, "Powerstroke mod syndrome"
Re: Acts like it's in 4 wheel drive, but it's not???
You didn't need to put the truck in 4 wheel drive...all you you needed to do is lock the front hubs in and drive it...you will be turning the axles and driveshaft to the transfer case...you are probably even turning some of the gears in the transfer case...I lock my hubs in about once a month to keep the oil moving on the gears and axles...usually run them engaged for a couple of days...also take truck to the sand dunes to engage the 4X4 itself to keep the solenoid working....just a thought....Kevin
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'04 F-250 Lariat CC LWB 2wd 6.0 Torqshift Dark Satin Green/Arizona Beige TRADED
07 F-250 Lariat CC LWB 4x4 6.0..Dark Stone/Arizona Biege Built 11/27 here on 12/06/06 picked up on 12/07/06...love the truck.....pictures soon...
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