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Old May 11, 2009 | 07:16 PM
  #1  
one8thursize1988's Avatar
one8thursize1988
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From: Rahway nj
transmission

I have an 01 f25o super duty v8 5.4lt. when i come to a slow stop at a light or a stop sign, i feel a thud, and i also feel it on accel. from a stop. its only when i stop and go. it feels like the problem is in my trans b/c i feel it in my feet. all other gears shift fine....any suggestions on what it may be?? thank you
 
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Old May 11, 2009 | 07:26 PM
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It could be a torque converter lock up problem or a slip yoke on one of the drive shafts.
 
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Old May 11, 2009 | 07:37 PM
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From: Richmond BC
yea, the slip yoke is the usual suspect for a slight "thud" from start and stoping..

the grease dries out in there...

if there is no other vibration after that initial thud then i would strongly suspect thats ur issue...
 
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Old May 11, 2009 | 08:48 PM
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one8thursize1988's Avatar
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so ur saying if i take my grease gun and grease the yoke where it connects to the driveshaft on the back of the trans my prob may go away??? now it doesn't always do it as hard as some times. one day it may do the thud lightly but like the other day i really noticed it but today not so much..but i still feel it no matter wut.
 
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Old May 11, 2009 | 09:16 PM
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I'd try greasing all the slip yokes first. A little grease is cheaper than torque converter work. If that doesn't do it, get a scan done to check for tranny codes.
 
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Old May 12, 2009 | 12:35 AM
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From: Richmond BC
yea u'll have to take the shaft out to properly grease it thou, as it doesnt have a Zerk fitting...

u could do it in the truck to but removing it is so easy u might aswell do it that way...
 
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