Vibration Only on Take Off
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Freshman User
Joined: Apr 2008
Posts: 48
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From: Johnston Co. in NC
Vibration Only on Take Off
I have stock 03 F250 CC with 135k miles. I have a vibration only when I start from a dead stop and then the vibration goes away once the truck is at 15 + mph. It feels like it is coming from the drive shaft. The truck does not off road any its mainly highway/pulling usage. Could this be a U-joint, carrier bearing, or something else problem? Any input would be great and any pics on how to remove a U-joint/drive shaft would be greatly appreciated.
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Thanks
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Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
Can you describe the vibration? Does it feel like the shaft is vibrating? Or is it a series of 2-3 "clunks" that feels like there's slop in the line? If it's the clunks, then it's probably your slip yoke needing some grease. The 2 piece drive shaft connects between the carrier bearing and the rear differential and has a tendency to push the grease out of the splines (not that Ford put much in there anyway). I have to re-grease my slip yoke about every year or so. Check out these links for the clunks:
https://www.ford-trucks.com/forums/8...aking-off.html
https://www.ford-trucks.com/forums/8...t-splines.html
If it's more of a vibration I would check the carrier bearing bracket to make sure it's torqued correctly and make sure it's properly shimmed. If you notice that the vibration is only when you're loaded or unloaded it could be a driveline angle problem, but you can't rule out an out of balance shaft either.
https://www.ford-trucks.com/forums/8...aking-off.html
https://www.ford-trucks.com/forums/8...t-splines.html
If it's more of a vibration I would check the carrier bearing bracket to make sure it's torqued correctly and make sure it's properly shimmed. If you notice that the vibration is only when you're loaded or unloaded it could be a driveline angle problem, but you can't rule out an out of balance shaft either.
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
https://www.ford-trucks.com/forums/8...placement.html
Here is a link to a thread that I was involved in dealing with removing a u-joint. Posts number 12 and 13 are the important ones if you are removing the driveshaft and any u-joint. If you think it needs to be balanced, (the driveshaft) you must remove the entire driveshaft, including the carrier bearing and take it to a driveline shop. It doesn't cost much to have this done. If it were me and I removed the driveline, I'd have everything replaced that moves. That way you won't have to mess with it again for many years. Obviously this is also a good time to re-grease the slip yolk too.
Here is a link to a thread that I was involved in dealing with removing a u-joint. Posts number 12 and 13 are the important ones if you are removing the driveshaft and any u-joint. If you think it needs to be balanced, (the driveshaft) you must remove the entire driveshaft, including the carrier bearing and take it to a driveline shop. It doesn't cost much to have this done. If it were me and I removed the driveline, I'd have everything replaced that moves. That way you won't have to mess with it again for many years. Obviously this is also a good time to re-grease the slip yolk too.
Hotshot
Joined: Dec 2006
Posts: 14,069
Likes: 17
From: Melbourne, Ky
Does it have a manual or automatic tranny?
Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
If you have an auto tranny, it sounds exactly like what mine was doing. It was only when starting from a complete stop (if I was still rolling it wouldn't do it). Grease the slip yoke and you should solve your problem...
Thread Starter
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Freshman User
Joined: Apr 2008
Posts: 48
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From: Johnston Co. in NC
Hit the Nail on the Head
1. Auto
2. That is exactly was is going on. It only happens from a complete stop and it does not happen any other time.
Thanks
2. That is exactly was is going on. It only happens from a complete stop and it does not happen any other time.
Thanks
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Laughing Gas
Joined: Apr 2007
Posts: 1,028
Likes: 3
From: Broad Run, Va
My truck does the exact same thing. I will grease the slip and see what turns out.
I read in another thread that it could be a bad injector??? I am not experienced enough to comment on this though...
Andy.
I read in another thread that it could be a bad injector??? I am not experienced enough to comment on this though...
Andy.
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Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
I'd do the greasing first. If you already have the grease it's free and takes an hour in the driveway. If not, it costs $5 for a tube of grease. It's worth a try before jumping to injectors...
I thought my tranny was on the way out (or my driveshaft was shot). An hour later it was like a new truck...
I thought my tranny was on the way out (or my driveshaft was shot). An hour later it was like a new truck...
Senior User
Joined: Aug 2004
Posts: 352
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From: Racine Wi
Mine had similar symptoms and it turned out to be the limited slip was worn out. Don't ask me why, but it had a shimmy from a dead stop, even going in a straight line. Someone on this site explained why, but I can't remember....anyway, I pulled the rear end apart, replaced the limitless slip with a locker and have never felt it again. I inspected the old posi and the plates were nearly bare. It was definitly worn out. Just another possibility.
Jim
Jim
Freshman User
Joined: Jul 2006
Posts: 37
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From: Coeur d'alene, ID
Mine does the same thing. It seems to happen when turning a corner going very slow (around 5 mph). It is a rumble / vibration. After you pick up speed, you do not notice it at all.
I had my slip joing re-lubed as well and it seem to help but I still have the issue now and then. I had a mechanic tell me that is was my clutch in the limited slip rear end. He said his Dodge does the same thing.
I had my slip joing re-lubed as well and it seem to help but I still have the issue now and then. I had a mechanic tell me that is was my clutch in the limited slip rear end. He said his Dodge does the same thing.
Laughing Gas
Joined: Apr 2007
Posts: 1,028
Likes: 3
From: Broad Run, Va
Mine does the same thing. It seems to happen when turning a corner going very slow (around 5 mph). It is a rumble / vibration. After you pick up speed, you do not notice it at all.
Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
Mine does the same thing. It seems to happen when turning a corner going very slow (around 5 mph). It is a rumble / vibration. After you pick up speed, you do not notice it at all.
I had my slip joing re-lubed as well and it seem to help but I still have the issue now and then. I had a mechanic tell me that is was my clutch in the limited slip rear end. He said his Dodge does the same thing.
I had my slip joing re-lubed as well and it seem to help but I still have the issue now and then. I had a mechanic tell me that is was my clutch in the limited slip rear end. He said his Dodge does the same thing.
Thread Starter
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Freshman User
Joined: Apr 2008
Posts: 48
Likes: 0
From: Johnston Co. in NC
I changed the rear dif. oil 6 months ago with Mobile 1 syn. However the problem was there before this and the syn oil did not fix the problem. The motor runs great so I'm sure it has to be coming from the drive shaft/or u-joints. Thanks for the input I'm going to do a re-grease on the drive shaft. It just amazing how little things like air pressure and grease can do wonders on how your truck drives.
