I have an 01 4x4 AC 5 Speed.. Was my dad's since brand new and now it is mine. Has 160k on it, stock suspension.
I do not remember feeling this until I just changed my brake pads and rotors... But does not really sound/feel like that is where its coming from? Napa rotors and Wagner Thermo cool pads.
When letting out the clutch, right before its fully released I hear/feel a thud. I can kind of feel it in my seat like its right below me. Does not matter how slow I let the clutch out or how slow I make the truck creep forward. Once I start moving and almost before its fully released, clunk. Not when the truck starts moving, but a little after it starts moving before the clutch is all the way released. Its a very dull clunk I feel in my seat and I can hear a little as well.
Only when moving forward. I do not hear it when reversing. I will have to test that more, since I dont reverse much...
Sometimes does not do it, but mostly it does it everytime. Sometimes pretty faint, sometimes pretty hard.
I greased all the zerks on the drive shaft and that did not change anything at all.
What could it be? Going to try sticking my Gopro under the truck and see if I can see/hear more specific where its coming from... Not sure if that will work or how to mount it under there.