Thump on acceleration
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Cargo Master
Joined: Apr 2007
Posts: 2,333
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From: St. Louis, Mo.
Thump on acceleration
My new to me 2002 F-250 Lariet ex.cab,sb, psd, 2wd, automatic tows great and runs great but I am feeling a slight bump or thump when I leave a stop light. Its more noticable when Im not towing. Almost feels like a brake caliper sticking as I had this happen on an old truck I had years ago. Just was looking for any input from other psd owners out there. Thanks in advance for any help! By the way truck has 76,000 miles , and has had new brakes within the past 10,000 miles.
Senior User
Joined: Sep 2006
Posts: 351
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From: In the Georgia Pines
Eurekaboy has an outstanding webpage on how to remove and re-grease the slip joint. looks like a very easy job.
http://www.eurekaboy.com/f250/slipjoint.htm
http://www.eurekaboy.com/f250/slipjoint.htm
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Cargo Master
Joined: Apr 2007
Posts: 2,333
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From: St. Louis, Mo.
Thanks for all the help. I'll give this a shot tomorrow. By the way this a great forum. I learn more reading here than any books can teach. Appreaciate the input.
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Hotshot
Joined: Nov 2006
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From: North of Greenville
Originally Posted by dsldandually
yeap sounds like the dreaded slip yoke clunk......easy fix is to drill the slip yoke and install a zerk (grease) fitting. every oil change give it one pump with the grease gun
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Originally Posted by Powerstrokedlariat
I found this place after I bought a repair manual that stated "Due to the complexities of the diesel engine we wont get into it very far.
Lead Driver
Joined: Dec 2003
Posts: 5,250
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i had the same problem and it was the u-joints. When I took the drive line down, I replaced the u-joints and carrier bearing and greased the slip yolk. While I was at it, I shimmed the carrier bearing as well. Every now and then it will start to do it again, but once I grease the u-joints, it goes away.
I never did get the drive line balanced, but that would be the last resort. Next time I take it down, I will put a zerk to grease the slip yolk.
I never did get the drive line balanced, but that would be the last resort. Next time I take it down, I will put a zerk to grease the slip yolk.
Last edited by empiretc; May 7, 2007 at 05:59 PM.
Post Fiend
Joined: Feb 2007
Posts: 7,191
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From: Blairsville,Ga
seems these trucks are famous for slip yoke clunk
ford sells a special grease to lube them with but would most likely be better to drill and tap yoke and grease with a good high impact grease
on class8 trucks everythng is bigger but same andthats the way we greased the for years and never had a problem if the were greased properly
ford sells a special grease to lube them with but would most likely be better to drill and tap yoke and grease with a good high impact grease
on class8 trucks everythng is bigger but same andthats the way we greased the for years and never had a problem if the were greased properly
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Cargo Master
Joined: Apr 2007
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From: St. Louis, Mo.
Well i finally got time to pull the driveline and grease the spline and this took care of the clunk. I thought about drill and tap but was worried about this throwing the weight off. I dont know if this would throw it out of balance. Any thoughts? Thanks to all for the help.