REALLY NEED HELP WITH AN 03 6.0!!! - Ford Powerstroke Diesel Forum
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Old 11-26-2007, 06:43 PM
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REALLY NEED HELP WITH AN 03 6.0!!!

I have tried to post this on the trannie forum a few times, but have not had ANY luck with replys. I just figure that there might be more viewers on the motor problems page. Anyways. When i am moving, say over 15 miles per hour, let off the throttle and then punch it, i get a very noticeable clunk. When i am stopped and i punch it, no clunk. Trannie shifts fine, no codes. Feels almost like driveline splines?? Or maybe U-JOINT. Every time though, let off throttle, give it throttle, CLUNK!! Please help. I am starting to wonder if it is something serious.
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Old 11-26-2007, 06:45 PM
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sounds like a u joint going bad to me.
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Old 11-26-2007, 06:48 PM
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i checked them. I did not take the driveline off to check them , i just got underneath when the truck is in neutral, and checked for play. None, do i need to take the driveline off to check? truck only has 53000 miles.
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Old 11-26-2007, 06:48 PM
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you can find out if its a u joint by putting the truck in neutral, and getting underneath and moving the drive-shaft at the u joints. if there going bad, you'll be able to feel and see the slack in them.

make sure you scoth the wheels tho. lol
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Old 11-26-2007, 06:49 PM
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whoops you posted while i was typing.

no, you dont need to take off the drive-shaft. if there's no slack with them in neutral there prolly ok.

i dont have any other ideas, but hopefully a tech will be along shortly to help ya
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Old 11-26-2007, 06:51 PM
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yup looks like i typed that while you were typing the same thing lol!!
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Old 11-27-2007, 04:44 AM
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Anyone? could it still be U-Joints?
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Old 11-27-2007, 03:14 PM
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If it's an extended or crew cab truck it could be the driveshaft splines needing grease. It's hidden inside the rubber flex boot just ahead of the differential. The lube ford uses is a "dry" teflon base and allows for that stupid clunk. Get some good synthetic grease and grease 'er up. You have to take the driveshaft out for that. Be sure and scotch the wheels.
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Old 11-27-2007, 05:01 PM
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ok then. i will pump some good grease in her, and we'll see. it is an extended cab, short box, does that make a difference?
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Old 11-29-2007, 04:14 PM
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i am thinking that since it is a short box the driveline might not be it is that right?
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