I've noticed lately that when I turn sharply, the rear end shudders a bit. Any ideas? It just started in the last few weeks...

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keith@myf150.com
http://www.myf150.com
Rocky Mount, NC

1999 F-150 XLT Styleside, Black On Black, SuperCab, Short Bed, 4x4, ORP, 4.6L Auto, 3.55LS

Mods: DrawTite Class III Hitch, Smittybilt Outland Grill Guard/Brush Guards, KC Daylighters, Custom Dual Exhaust w/ Dual Flowmaster 40's-Straight Out The Back, Airaid FIPK, SuperChips Chip, Bug Deflector, Pace-Edwards Roll-Top Bed Cover

 

THIS MIGHT NOT BE A BAD THING. I DO NOT KNOW HOW LONG YOU HAVE HAD YOUR TRUCK, BUT FORD HAS A LIMITED SLIP REAREND THAT IF MAKING SHARP TURNS BOTH REAR WHEELS TRY TURNING TOGETHER MAKING A SHUDDER.CHECK AND SEE IF THIS IS THE CASE.

91 F150 4X4 300 6-CYL.MOSTLY STOCK

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It's a 99 with approx 20k miles on it. Yes, I have the limited slip, but why is it doing it now? Shouldn't it have been doing that all along?


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keith@myf150.com
http://www.myf150.com
Rocky Mount, NC

1999 F-150 XLT Styleside, Black On Black, SuperCab, Short Bed, 4x4, ORP, 4.6L Auto, 3.55LS

Mods: DrawTite Class III Hitch, Smittybilt Outland Grill Guard/Brush Guards, KC Daylighters, Custom Dual Exhaust w/ Dual Flowmaster 40's-Straight Out The Back, Airaid FIPK, SuperChips Chip, Bug Deflector, Pace-Edwards Roll-Top Bed Cover

 

Another thing worth mentioning. Hurricane Floyd came through here a few weeks ago, and we had LOTS of flooding. I went through a lot of water, some up to my nerf bars. I asked my Ford service department if I needed to have anything checked/etc after all the water, but they said it should be fine unless I had let it sit in deep water. (Which I didn't...) Sound right to you?

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keith@myf150.com
http://www.myf150.com
Rocky Mount, NC

1999 F-150 XLT Styleside, Black On Black, SuperCab, Short Bed, 4x4, ORP, 4.6L Auto, 3.55LS

Mods: DrawTite Class III Hitch, Smittybilt Outland Grill Guard/Brush Guards, KC Daylighters, Custom Dual Exhaust w/ Dual Flowmaster 40's-Straight Out The Back, Airaid FIPK, SuperChips Chip, Bug Deflector, Pace-Edwards Roll-Top Bed Cover

 

You may have water in the rear end, you better check. You should not have water in there unless the water came above your venthose on the rear axle.

 

If you said that you had water up to your nerf bars, then there is a good chance that your vent hose was submerged allowing water to get into the axle.

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99 F-150,XLT, Silver, 2WD, 4.2L, 5spd, RegCab, Shrt WB, Styleside.
Current Mods:Billet grille, Line-X bedliner, 5%window tint all the way around, Alpine CD w/2 MTX Subs & Rockford Fosgate 250w amp. K&N Airfilter. Glasspac w/dual exhaust exits out the back. Blue Ion Headlights.
Future Mods: Superchip, driving lights, & a custom paint job

 

You must of missed my post on this topic called Scrubbing Limited Slip Differential.
I have exactly the same problem. The funny thing is, I did get about an ounce of water in my diff threw the vent from offroading, but it wasn't until I changed my fluid that it started to scrub around corners. My post explains it in more detail.

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'98 F-150 XLT Reg. Cab Flareside 4x4, Black, 5.4l, 3.55LS, tow package, K&N, GTS headlight covers, Alpine changer w/FM mod, Clifford alarm system w/keyless entry & starter disable // Future considerations: 285/75/r16 Mud Terrain BFG's, bed mat, tonneau cover, 4" suspension lift.

 

consoft, couldn't hurt to get it into the dealer, did you or are you using the one in Rocky Mt?
They're on tv, telling people there open and will give a flood rebate??
I'll bet their service dept is busy, all those water logged vechiles......Take Care

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DOGCAM
2000 F150 Lariat flareside 4X2
S/C
5.4, 3.55 Ls, Tow Pack, Captain
Chairs, White clearcoat/w
harvest gold & wedgewood blue accent,17"X8"
BFG T/As 275x60s on chrome wheels
Mods:K&N Filter, True duals
(Dynomax) with 3.5 chrome
tips out behind the rear
wheels
dog46cam@webtv.net
dogcam@myf150.com

 

I thought it was the engine, then the trans went bad (rear seal) then I thought it was a Ujoint, then the rear end... Finally after no help from the dealer!!! I take the drive shaft to a driveline shop. They say the driveline on my SuperCab is too long for an aluminum drive. It turns into an aluminum jump rope at 2500 rpm and vibrates like crazy. There is no way to balance it. They recommend cutting it and puttina a carrier bearing in the middle for $500. What a poor design on Ford's part...

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1 in 1000,000. Has anyone heard of this?

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'98 F-150 XLT Reg. Cab Flareside 4x4, Black, 5.4l, 3.55LS, tow package, K&N, GTS headlight covers, Alpine changer w/FM mod, Clifford alarm system w/keyless entry & starter disable // Future considerations: 285/75/r16 Mud Terrain BFG's, bed mat, tonneau cover, 4" suspension lift.