Odd clunk shudder when stopping, almost to a stop - Ford Powerstroke Diesel Forum
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Old 07-26-2008, 06:42 PM
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Odd clunk shudder when stopping, almost to a stop

I swore it was my trailer"s" for a while, since its always towing. Then i had nothing on it for a couple days driving around a little, when i come to a stop, i mean between 10mph and zero, it thunks, almost as if its downshifting into 1st gear at the very last second, but when your not to a stop yet?

It "feels" to me like its in the front though, since i feel it in the steering wheel. Is there anything i could check? It seems to happen at least 75% of the time, from any speed, and stopping fast or casually, i mean crawling to a stop on the brake minimally, you'll still feel it "clunK" sometimes just as you come to the stop.

Does it with a full tank, empty tank, nothing in the bed, pulling trailers or not, on rough or smooth pavement, wet or dry, and were always in 2wd, whats going on?
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Old 07-26-2008, 07:02 PM
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I had the same thing. If your truck has the two piece drive line, take one half off and grease up the splines in the slip joint real well. Clunk vanished after that. Its just when you accelerate or brake the joint has to slide and if it isn't extremely well lubed it will make a clunk when it breaks loose to go in and out. If it has a one piece drive line.... you may have a ghost.
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Old 07-26-2008, 08:18 PM
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Quote:
Originally Posted by RedDye01 View Post
I had the same thing. If your truck has the two piece drive line, take one half off and grease up the splines in the slip joint real well. Clunk vanished after that. Its just when you accelerate or brake the joint has to slide and if it isn't extremely well lubed it will make a clunk when it breaks loose to go in and out. If it has a one piece drive line.... you may have a ghost.
its a long bed extended cab, i think it has that mounting point in the middle under the bed, so its a 2 piece drive shaft.. So your saying to get grease up in there? How does it come apart? Ill have to look at it closely tomorrow. thanks
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Old 07-27-2008, 01:21 PM
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You have to take the straps off the u joint on the rear diff and pop the clips off the rubber boot that goes over the slip joint. You should be able to slip the splined end right out. You'll want to wipe grease inside the hole where the splines slide in. You'll want to put in as much as you can but beware - if you put in too much you'll pretty much end up making it impossible to slide the shaft back in because of all the pressure it will take to shove it in with all that grease. Thats about it. Make sure you mark the upper and lower shaft with chalk so you get the splines back in the same spot or the driveline will shudder (out of balance). Its easiest to have the truck in neutral when you do this so put the parking brake on. Good luck.
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