Thump while accelerating
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Thump while accelerating
So lately I have noticed that my 99 F-250 has a bit of a "bump" while accelerating. Think of it as accelerating with a trailer and something is loose on the hitch, making a sort of bump or thump. I talked to the guy at the parts store and he said to put it in neutral and wiggle the driveshaft up and down, side to side. When I did that it moved up and down, but not side to side, but I'm not sure if that's because it's just positioned that way or what. The wobble was coming from the slip yoke back by the rear diff. Is this something I should be concerned about? I priced a new driveshaft at about $360. Also, I have an ext. cab and short box, 1 piece driveshaft.
Here's a video (a very crappy video at that), not sure if it gets enough info through or not but hopefully you kinda get how much play is in there.
Here's a video (a very crappy video at that), not sure if it gets enough info through or not but hopefully you kinda get how much play is in there.
Laughing Gas
Joined: Jun 2011
Posts: 1,223
Likes: 89
From: TN
Use hi temp grease. I used wheel bearing grease the first 2 times. Used hi temp last time and is good so far with about 10k miles.
Laughing Gas
Joined: Apr 2007
Posts: 871
Likes: 74
From: Houston TEXAS
I followed LINK: THIS THREAD when I did the slip joint on my 2004. It was making the bonk sound/feel when taking off from a stop.
After grease... no more bonk!
After grease... no more bonk!
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Looks simple enough, I'll see if I have time to do it this weekend. I'm thinking of replacing the U-joint bearings as well, would it pay to? As of now they don't move or wiggle--yet.
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Laughing Gas
Joined: Apr 2007
Posts: 871
Likes: 74
From: Houston TEXAS
Not sure what your mileage is... but just being 17+ years old might warrant new u-joints and maybe a carrier bearing (if you have one) just due to age.
Relatively easy DIY stuff too, parts should be common and easy to get, so shouldn't cost too much.
Relatively easy DIY stuff too, parts should be common and easy to get, so shouldn't cost too much.
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The truck has about 130k on it. So I just replace the whole U-joint altogether?
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RenoHuskerDu
1999 - 2016 Super Duty
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Dec 19, 2017 12:26 PM