clunking noice from drive train? - Ford Powerstroke Diesel Forum
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Old 10-21-2006, 05:27 PM
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clunking noice from drive train?

1.) If i release the clutch too quickly i can feel the clunks.. (Like Puting a rock inside a can and shaking it 2-3 times with less force each time..) It also rattles most of the time under 1000rps while moving..

2.) While in neutral i can hear a faint grind or vibration, when i press the clutch it goes away.

i havent taken it to the dealer yet but took it to three different 'diesel' shops to gather different 'ideas'? and all three came up with different possible problems..

one said it was the tranny an other that it was 'something' relateds to tranny and the last one that it was the flywheel that needed replacement..

The truck rides fine, pulls good and shifts fine (except 1st from a stop, some times i go into 3rd then into 1st cuz it just dont want to go into 1st the first time)

I bought the truck a few days ago and it came with 3 a month 3K warranty and wanted to educate my self about the problem(s) & know what it is b4 trying to use the warranty to avoid any 'excuses', run arounds and what not..
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Old 10-21-2006, 05:47 PM
Jon
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Well!

If you let out on the clutch quickly and it makes a noise like you described it probably isn't good. But those particular trannys are noisey with it in neutral. When you push in on the clutch it will go away. I forget the actual term Ford uses but they will say it is normal. You might want to let someone that knows what they are doing listen to the other noise.
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Old 10-21-2006, 06:04 PM
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specially on reverse but also when i start to accelerate and i press the clutch again...

seems like something is loose, i know nothing about these trucks but sounds to me like if it was a loose shaft that when pressing the clutch all the binded unused torque makes the shaft dance up and down, and comes from the front..

those three places were diesel 'specialist', but i dont quite trust them specially if all three say 3 different things..
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Old 10-21-2006, 06:51 PM
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Do you have a 2 piece drive line in your truck?

Edit- In case you're not sure, a two piece driveline has a carrier bearing near the center supporting the driveline. Just to the rear of the support there will be a rubber boot covering the splines of the drive shaft.

Last edited by jeshoyt; 10-21-2006 at 07:01 PM.
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Old 10-21-2006, 07:09 PM
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i'll take pictures and post to make sure... not familiar with all that terminology..
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Old 10-22-2006, 08:27 AM
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hey, i added some temp pictures of the driveline in the 'my garage' section..
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Old 10-22-2006, 08:36 AM
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Quote:
Originally Posted by kamaleon View Post
hey, i added some temp pictures of the driveline in the 'my garage' section..
This clunking is a relatively common problem with the SD trucks. The picture on the top far left, that is the boot I'm talking about. If you take the driveline apart at the rear u-joint you can slide the rear portion of the drive line out and you'll see it's painted a blue color on the splines. You prolly need to grease the splines and put it back together. I know it sounds weird, but when I bought my truck it was clunking on take off, and when i braked at a stoplight. It was really annoying. I greased the splines and haven't had any type of clunk since. It's a pretty easy job man. Ford sells some teflon grease they wanted $37 a pint for, I just got some Slick 50 GL1 rated grease for $6 at Autozone. It works good.

Edit-your problem sounds similar to what I had going on. DON'T FORGET TO MARK THE DRIVELINE BEFORE TAKING IT APART. 3 marks, one on the rear dif., 1 on the rear shaft, and one on the front shaft.

Last edited by jeshoyt; 10-22-2006 at 08:40 AM.
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Old 10-22-2006, 08:43 AM
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when you say the rear u-joint.. you mean at the boot or at the rear differential?
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Old 10-22-2006, 01:02 PM
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Quote:
Originally Posted by kamaleon View Post
when you say the rear u-joint.. you mean at the boot or at the rear differential?
The u-joint at the rear differential is the one to take apart, there is no u-joint under the boot. Once you do that, you can pull the rear portion of the driveshaft apart. The splines that need greased are located under that rubber boot in your picture. If you're careful you can re-use the boot clamps. I only took the rear clamp off, then just slid the rear shaft out.
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Old 10-22-2006, 05:02 PM
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got it.. where do i get those boot clamp? just in case i need them.
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