[Vladislav Vlasov]

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!

 

[cvincent]

the transfer case chains do get loose and sometimes break the mount for them

have you been changing the fluid in the trans case?

 

[Vladislav Vlasov]

The problem is that I got this car little under a year ago, and it already had 138k miles.

Honestly I have no idea when was the transfer case fluid changed last time.

However the shop I took it to said that all mounts and suspension parts on the outside are tight and require no replacement.

 

[cvincent]

it is not the mount on the outside, it is the guide /mount on the inside of the transfer case that holds the chain that breaks when the chain gets loose

someone posted on another forum where they found the manufacturer of the transfer case for mercedes , the price was reasonable and you got a warranty

once you get a new one change the fluid at least every 25,000 miles, it is just 1 quart of trans fluid and easy to change

this is a common problem on these trucks, so good chance that is it

 

[Vladislav Vlasov]

Understood, thanks!

So best bet in that situation is to swap out the transfer case?

Does anyone rebuild those things?

 

[cvincent]

I put in a used one, but had my differential shop open it and check it over first

But if i had to do it over would get the rebuilt one from that comapny the guy found on this forum or the other benz forum
It was a decent price, and there was a 1 or 2 year warranty i think

did not know about that one when i had to repair mine

Some people have also tried to weld or fix the broken guide inside, do some searches on transfer case on both forums and you should find them

 

[Vladislav Vlasov]

Understood, thanks!

 

[ErikGL550]

I am having a similar issue. Were you able to fix the noise?

 

[StenoPete1911]

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...

 

[ErikGL550]

Thank you!