Transmission Thump

[gmcleer]

I have noticed a light thump on occasion when the truck a 2017 2500 CC 6.0 is decelerating. It is no where near as loud as it was on my 2014 5.3, but still noticeable. Anyone else hearing this?  Any fix?  Any drive shaft or leaf spring issues?

[newdude]

Normal.  Gear backlash.

[mjm-1957]

There is a service bulletin about that and it says to see if the noise goes away with a full tank.If it does, they say its fuel sloshing in the tank and is considered normal.

[redwngr]

1 hour ago, mjm-1957 said:

There is a service bulletin about that and it says to see if the noise goes away with a full tank.If it does, they say its fuel sloshing in the tank and is considered normal.

Drove an '11 2500 dmax for a bunch of years.

It would often do that with a partial tank.