Big Ol Clunk
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Junior User
Joined: Sep 2006
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Big Ol Clunk
Hey guys, I have a 93 F-150 4x4 and every now and then, when accelerating from a stop usually, there is a rather large clunk in the drivetrain somwhere. You can feel it and sometimes it is pretty brutally loud, a very metallic sounding noise. It isnt the U-joints, they are all new. I have grabbed the shaft and tried feeling for any play in the rear end but that seems fine too. Maybe it has something to do with the transfer case?!
I did have some issues with the transfer case as well as the 4x4 system this past winter/spring. The shift lever broke (a legendary trait of this era of truck) and the thing got wedged in between 4x4 and 4x2 for a moment and it make a pretty bad racket, could have damaged something? lol I hope not.
But this clunk usually only happens when taking off, feels like there is play somewhere, just wondering about some insight on my issue! thanks alot.
I did have some issues with the transfer case as well as the 4x4 system this past winter/spring. The shift lever broke (a legendary trait of this era of truck) and the thing got wedged in between 4x4 and 4x2 for a moment and it make a pretty bad racket, could have damaged something? lol I hope not.
But this clunk usually only happens when taking off, feels like there is play somewhere, just wondering about some insight on my issue! thanks alot.
Fleet Mechanic
Joined: Nov 2003
Posts: 1,372
Likes: 14
From: West Cornwall, CT
There is a good chance that this clunk is when the slip joint from the driveshaft to the transfer case jumps forward slightly when you start moving.
The cure (temporary cure anyhow) is to pull the slip joint out of the transfer case and lube the shaft splines with your favorite grease and reassemble. The hardest part of this job is removing the fasteners needed to drop the driveshaft.
Lou Braun
The cure (temporary cure anyhow) is to pull the slip joint out of the transfer case and lube the shaft splines with your favorite grease and reassemble. The hardest part of this job is removing the fasteners needed to drop the driveshaft.
Lou Braun
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Junior User
Joined: Sep 2006
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Okay thanks for your insight, I will definatly try greasing up those spindles as sugguested, hey it wouldnt hurt anyway! It didnt do it at all today, its a very intermittent thing so I figure it cant be too far on the verge of some kind of failure if its only once in a while....knock on wood lol.
She needs a pair of nice plastic gas tanks though, the rear one sprung a leak! Thank god for the two tanks, its keeping me in business at least for now!
She needs a pair of nice plastic gas tanks though, the rear one sprung a leak! Thank god for the two tanks, its keeping me in business at least for now!
New User
Joined: Aug 2006
Posts: 11
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my 93 x-cab 4X4 does the same thing and when I was in auto tech school my instructor told me that it is caused when you come to a stop suddenly or hold the brake pedal the entire time you stop try slowing down gradually and letting off the brake pedal and rolling a bit before you accelerate. it holds true in my case. I was told that the drive train on these trucks is so long it has alot of room to hold itself in a bind and when you let off the brake and hit the gas it unwinds so to speak and clunks when everything catches up and starts to move the truck. I've heard of the same being true on like model chevys as well.
