Odd Clunk from Drivetrain
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Senior User
Joined: Jun 2000
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From: Half Moon Bay, CA
Odd Clunk from Drivetrain
Good evening guys and Happy Holidays.
In the past two weeks my truck has started making an odd clunk sound from the drive train. It occurs when I reverse, shift into drive and proceed. Once I stop for the first time after the shifting it clunks. Any ideas on what is causing this and what the fix might be?
Also, how much can you overfill an automatic transmission before you can cause problems?
The truck is a 2000 F150, 5.4 liter 4x4. 229,000 miles.
Thanks for your help guys.
Barry
In the past two weeks my truck has started making an odd clunk sound from the drive train. It occurs when I reverse, shift into drive and proceed. Once I stop for the first time after the shifting it clunks. Any ideas on what is causing this and what the fix might be?
Also, how much can you overfill an automatic transmission before you can cause problems?
The truck is a 2000 F150, 5.4 liter 4x4. 229,000 miles.
Thanks for your help guys.
Barry
Last edited by mcdev; Dec 23, 2011 at 08:43 PM. Reason: added truck info
Elder User
Joined: Oct 2011
Posts: 795
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Good evening guys and Happy Holidays.
In the past two weeks my truck has started making an odd clunk sound from the drive train. It occurs when I reverse, shift into drive and proceed. Once I stop for the first time after the shifting it clunks. Any ideas on what is causing this and what the fix might be?
Also, how much can you overfill an automatic transmission before you can cause problems?
Thanks for your help guys.
Barry
In the past two weeks my truck has started making an odd clunk sound from the drive train. It occurs when I reverse, shift into drive and proceed. Once I stop for the first time after the shifting it clunks. Any ideas on what is causing this and what the fix might be?
Also, how much can you overfill an automatic transmission before you can cause problems?
Thanks for your help guys.
Barry
Thread Starter
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Senior User
Joined: Jun 2000
Posts: 188
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From: Half Moon Bay, CA
Thanks. I will check out the drive shaft this afternoon.
I figured as much about the transmission fluid. I have a knucklehead buddy who insisted that overfilling wasn't a big deal.
I figured as much about the transmission fluid. I have a knucklehead buddy who insisted that overfilling wasn't a big deal.
Hotshot
Joined: Jul 2005
Posts: 11,931
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the older trucks are known to wear the splines on the drive shaft slip joints. When you change direction you can get a shift in the wear area on the splines and get a "clunk". Check the U- joints, but if it only happens "once" then it might be the splines. YOu can take it off and grease the splines and that can help. Some greases are better than others at absorbing shocks.
Hotshot
Joined: Jul 2005
Posts: 11,931
Likes: 180
I just used regular chassie grease and worked o.k., some of the guys have used it and the clunkc comes back in 6 months. I have heard of using a moly based grease like they use on bulldozer blade sockets.. some are trying that.
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