problem never seen or can fix.
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New User
Joined: Aug 2010
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problem never seen or can fix.
i have a 99 powerstroke f250 4x4 extended cab short with auto. my problem is at start of accel off a stop light, or rolling up to a stop, i can feel a knock/thud in the truck. almost feels like a loose leaf spring. what i have done is all new bushing in rear and front leafs/shackles. u-bolts and hardware are tight, new trans and motor mounts. new u-joints in front axle and u-joint rear drive shaft, front shaft out of truck. i have no idea what it is and truck been to dealer and cant figure it out.
Lead Driver
Joined: Jan 2007
Posts: 6,708
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From: Kiowa CO
Welcome to FTE, couple random ideas. Not sure if the ex-cab short beds have a carrier bearing on the rear driveshaft but if you do, check for play. Also, the lower shock mounts on the rear axle are bolted with u-bolts around the axle tubes. Check to see if they are loose.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
My vote is a sticky slip joint. You can lube it yourself or take it to the dealer and they'll do it.
Here are a few posts you can read and see if you might have the same problem.
https://www.ford-trucks.com/forums/9...rivetrain.html
https://www.ford-trucks.com/forums/9...from-stop.html
Edit: Here is a writeup that looks good. Just make SURE you chalk those wheels before you crawl under your truck!
http://www.eurekaboy.com/f250/slipjoint.htm
Here are a few posts you can read and see if you might have the same problem.
https://www.ford-trucks.com/forums/9...rivetrain.html
https://www.ford-trucks.com/forums/9...from-stop.html
Edit: Here is a writeup that looks good. Just make SURE you chalk those wheels before you crawl under your truck!
http://www.eurekaboy.com/f250/slipjoint.htm
Hotshot
Joined: Jul 2003
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From: Newport, WA
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Cargo Master
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Brett Foote
Posting Guru
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From: Tonoph,AZ
Welcome to FTE, couple random ideas. Not sure if the ex-cab short beds have a carrier bearing on the rear driveshaft but if you do, check for play. Also, the lower shock mounts on the rear axle are bolted with u-bolts around the axle tubes. Check to see if they are loose.
Chris yeah they got carrier bearing in SC short bed....
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New User
Joined: Aug 2010
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the truck does not have a carrier bearing, the shock mounts are good, seems that the rear diff has good play but do not have spec. the rear drive shaft slip yoke seems ok and does move ok, but goin to put grease in it. also i forgot to say that the problem only occurs when warm out side, in winter and fall it will not happen.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
Yup. Your Ford dealer's parts department will have a three-ounce squeeze tube of it under part number "XG-8, PTFE Lubricant".
You'll use about a tablespoon of it.
Pop
You'll use about a tablespoon of it.
Pop
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
the truck does not have a carrier bearing, the shock mounts are good, seems that the rear diff has good play but do not have spec. the rear drive shaft slip yoke seems ok and does move ok, but goin to put grease in it. also i forgot to say that the problem only occurs when warm out side, in winter and fall it will not happen.
