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1997 - 2003 F150 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage SPONSORED BY:

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Old 03-09-2011, 05:39 PM
big-papa big-papa is offline
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2001 F-150 vibration

I have a problem with what feels like vibration to me and the people who ride in my truck.The question is i have no vibration at all from a stand still and acceleration but when I turn the vibration is there and only getting worse.It feels like it is coming from the rear of the truck but i could be wrong.So if you had this problem or know whats wrong i would appreciate any and all help. Thanks in advance
Richard
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Old 03-09-2011, 06:41 PM
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If You have a Posi Rear & it does it on a turn from a start it sounds like the clutch pack grabbing in the rear. May just need gear oil changed & posi additive or could be clutch is bad. Just had mine done.
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Old 03-09-2011, 07:15 PM
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not sure what clutch pack you mean is it the one in the trans or is there one in the rear end?
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Old 03-09-2011, 07:23 PM
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If It's A studder in the rear when You make a hard turn,& it's a posi, it's the clutches in the rear. The posi additive availabe at autobone or pepboys may help. Like 6 bucks. Check the Vin sticker on the door jam for the code to see what rear you have.
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Old 03-09-2011, 08:28 PM
big-papa big-papa is offline
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this is what i got from the door tag if it helps or not B6 — 3.73 limited slip (F-150, F-250)
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Old 03-09-2011, 08:30 PM
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B6 — 3.73 limited slip (F-150, F-250) hope that helps so im guessing i do not have posi.
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Old 03-09-2011, 11:30 PM
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FORDis not positrack... FORD is called limited slip or LS.. yes you have that. What you need to do is go to Auto Zone and get a 7 oz tube of friction modifier for gear lube. Crawl under the truck and take the 3/8 inch pipe plug out of the axle pumpkin just above the drive sahft center line on the drivers side. Put a hooked wire into the hole and see if the level is down 1/2 inch. IF so, just squirt in the addative. If not, suck oout 7 oz of oil with a tube and add the addative. Drive for 50 miles and you should be o.k. after that.
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Old 03-10-2011, 12:17 AM
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ok i will try that and i'll let you know if it helps
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Old 03-10-2011, 12:17 AM
 
 
 
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