Clunk while accel/decel - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 06-14-2014, 03:50 AM Thread Starter
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Clunk while accel/decel

My 05 4x4 ex is completely stock with 138xxx miles is giving me a "clunk" you can hear/feel... most noticeable at highway speeds when you let off the pedal and press it... sounds like the driveshaft has play... I did some research and found a bunch of stuff about greasing the slip yoke splines but if I understand correctly thats just for two piece drive shaft mine is a single... it also gives me a slight 1 second vibration on decel as well... my theory is ujoints... just wanted to see if anyone else had a similar issue... I hate throwing parts at vehicles...

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post #2 of 4 Old 06-14-2014, 07:57 PM
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I'm having a similar sensation. I'm curious what people have to say!


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John In Canada
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post #3 of 4 Old 07-08-2014, 07:56 AM
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Maybe suspension related? Drop the front anti-sway bar and see if the issue persists. I replaced the sway bar connecting arms (correct term?) when I got my '05 with 118k to solve a clunk.

At 140k miles now, I am curious about the stock ujoints (rear propeller/drive shaft) that don't have grease fittings. Any information on how long these typically last?

2005 Excursion Engine: EGR/CAT Delete, Innovative ECM Tune, PHP FICM Tune, coolant filter, stock TTY head bolts and Ford Gold Coolant. Suspension: Bilstein shocks; V Codes springs on front; RAS and Air Lift airbags over stock rear springs.
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post #4 of 4 Old 07-08-2014, 08:31 AM
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Quote:
Originally Posted by Moungo View Post
I did some research and found a bunch of stuff about greasing the slip yoke splines but if I understand correctly thats just for two piece drive shaft mine is a single

One piece drive shafts still have slip yokes. It's easy to test u joints. Block the tires, put the truck in neutral, grab the one yoke with one hand and the other one with the other hand. Then move your hands in opposite directions. Kinda like giving a Indian burn. If you feel any play they are bad.

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