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Getting some pretty nasty sounds from my transmission and wondering exactly what it may be. It seems to only make this sound when in Park or Neutral and also when the truck warms up, does not make this sound during start up when cold. Truck has about 152,300 miles and i had replaced all the fluid, filter and two solenoids at 148,600 miles 7 months ago. I'm pretty much expecting the worst here, but if anyone could give me some more insight as to whats going on besides it probably dying, i'd appreciate it. Clips of sounds here: https://youtu.be/blljaS5cpcI https://youtu.be/8T5tSLoT8aA https://youtu.be/wVcztpMtngc https://youtu.be/lfWhm7fJrYs
I just got a new to me 2011 2500HD duramax with 99k miles on it. Just here recently every time I put the truck in park and it rolls until the transmission catches I hear a pretty loud popping sound from somewhere under the dash in the floor of the drivers seat. Everything works fine as far as I can tell, and I’m fairly certain it’s inside the truck. I can feel it in the brake pedal and sometimes I think I can in the steering wheel. It doesn’t do it in a turn or anytime the truck is moving in drive or reverse. Only does it when put in park and let go of the brake. I have no clue what it is. Thanks!