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08 GL550 x164 clunking noise when accelerating?

9266 Views 9 Replies 4 Participants Last post by  ErikGL550
Hi everyone!

Having trouble figuring out the problem on my GL... Maybe one of you guys had something similar.

My GL550 is making a clunking noise when accelerating from a stop sign or a traffic light. Especially heard when not coming to a complete stop (slow down to 5mph and accelerate).

Took it to a good reputable shop today, they have checked over all the mounts and possible weak spots that could cause the noise, but everything is tight. Engine/trans mounts have already been replaced recently.

Noise is coming from underneath somewhere in the middle of the car.

Mechanic told me that it's most likely something internal in transmission or the transfer case.

Said that most likely the chain inside the transfer case got loose.

Considering just taking it to my local MB dealership and have them look at it.

Has anyone ever had similar issue?

Thanks in advance!
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I am having a similar issue. Were you able to fix the noise?
It's the transfer case chain. They do get stretched and make a noise under moderate to hard acceleration. You can swap out the transfer case or rebuild it. GL.

Good video for it...

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