matsmueller65

GLK gearbox issues and transfer case oil wear

My 2012 Mercedes GLK with a gasoline engine is giving me a headache. It's got about 148000 km on it and I've noticed the gearbox slipping sometimes, shifts just feel unclean. I'm getting a fault code related to transfer case oil wear. I'm thinking it might be worn gears in the transfer case, causing metal flakes and all that. I've read that could be messing with the transfer fluid. Any thoughts before I potentially drop 330€?

A 2012 Mercedes GLK owner is experiencing gearbox slipping and unclean shifts, with a fault code indicating transfer case oil wear. The suspected cause is worn gears in the transfer case, potentially contaminating the transfer fluid with metal flakes. It is suggested to check the transfer fluid level and condition, as burnt fluid may indicate internal wear. The recommended solution is to have the vehicle inspected by a reputable workshop for a proper diagnosis before proceeding with repairs.

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4 comment(s)

Whoa, that sounds familiar! I had a similar issue with my old Volvo XC70. It wasn't exactly the same, but I had some rough shifting and a weird gear grinding noise, especially when accelerating. I also got a warning light which indicated transmission issues. For me it also turned out to be transfer case oil wear. Have you checked the transfer fluid level? Is it discolored or does it smell burnt?

I haven't checked the fluid level myself yet, but if it was low, wouldn't the warning light come on? And if the fluid is burnt, does that definitely mean it's the gears? I'd really prefer to avoid replacing the transfer case if at all possible.

A low level might trigger a light, but it doesn't always happen. My light only came on after a grinding sound started. As for the burnt fluid, it's a strong indicator of internal wear. It could be something else, like a clogged filter, but honestly, with those symptoms and the oil wear fault code, it really does sound like gear wear. I think taking it to a reputable workshop is the best next step. They can properly diagnose it before you commit to any repairs.

Thanks for the insights. I'll get it to a workshop and have them take a closer look. Turns out it was indeed the transfer case and I authorized the repair.

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MERCEDES

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GLK