Howdy good folks!
Any updates on this dreaded rearend Slip Yoke Thud/Clunk dilemma?
I drive a 2015 Sierra 1500 with only 10k and of course, I am part of the Clunk Club along with you fine folks.
I have been just trying to get used to it, but I am one of those "sensitive" or "vigilant" drivers that try to listen to all noise, vibrations, ticks, and get the feel of what I am driving.
And so it is sometimes hard to ignore sometimes because you feel like something is about to break. When I first heard the clunk/thud I guessed that it felt like the tailgate hatch door is slightly lose and when I stop (push on break), you can hear the thunk/thud; at first I thought maybe the tailgate door just needed tightening and that it was generating that "lurching" noise as if the tailgate moved from its lock slightly forward to hit itself to make that noise and then when you release the break to move forward, it does it again with the noise! This happens for me for both Drive and Reverse, and typically on slow moving pace, not above third gear, and happens during stop lights/signs, pulling out of parking lots to join traffic, from slow speeds.
Obviously it is not a lose tailgate latch as I have already checked out my theory and that thing is pretty tightly shut. So my initial more complex guess was maybe if the truck has a differential bushing that makes the differential case hit the truck when break pedal is pushed or released. But I also feel that if you keep the break pedal down, a few tiny seconds later, you can hear a smaller thud, as if something shifted (the u-joint or yolk, maybe). That is one theory.
Here are my other useless theories:
--could be leaf springs hitting each other when pressing and releasing break --differential gears (bad rings and pinion gears/spider gears or backlash or the pinion payload needs tightened maybe) --bad u-joints, bad propeller shaft measurements --something else lose in the rearend that makes that lurching and receding clunk when you accelerate and de-accelerate.
--or maybe it really is the differential bushing
--MORE LIKELY, slip yoke spline from the propeller shaft (needs greased, check for grease fittings) i.e. THE CLUNK IS HERE TO STAY
Can you guys give an update on your experiences and if anyone has found a solution by now and the length of your bed (mine is the longer one, regular cab).
Has GM addressed this or just basically shrugged it off as common? And also has anyone experienced the sound while towing a rig? Is it worst or just the same?
Thanks and hopefully we can all console each other and figure out a solution.
