Glk 350 transmission
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Joined: May 2025
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2011 glk350
Glk 350 transmission
So I have a 2011 glk 350 with the a89 code meaning 722.9 plus (updated version ) anywho I believe my torque converter is bad or going bad first through 3rd gear are fine when driving normally but when u really get on it . It studders a bit and seems to slip and the rpm’s bounce around like crazy like it can’t stay in gear car is drive able but trying to see if it’s the converter ALSO if I were to just swap the transmission could I get by with swapping over my tcm and valve body to avoid reprogramming the new unit ?
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Joined: Mar 2025
Posts: 87
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From: Bloomington, IN
2010 GLK350, 2021 Taco, 2019 Lexus GX460, 2009 BMW 335d, BMW 328xi
How many miles on the car?
Has the transmission ever been serviced or fluid changed?
As long as the new transmission is the same generation and same options, you should be able to swap the electronics and make it work.
Has the transmission ever been serviced or fluid changed?
As long as the new transmission is the same generation and same options, you should be able to swap the electronics and make it work.
Thread Starter
Newbie
Joined: May 2025
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2011 glk350
Glk350
The truck only has 148k on the dash the transmission is from a 2012 e350 722.9 plus same as mines with about 95k miles on it but I’m pretty sure my torque converter is what went bad because the car is drives me and doesn’t slip getting in gear it slips trying to get the power to the transmission
Thread Starter
Newbie
Joined: May 2025
Posts: 10
Likes: 0
2011 glk350
The truck only has 148k on the dash the transmission is from a 2012 e350 722.9 plus same as mines with about 95k miles on it but I’m pretty sure my torque converter is what went bad because the car is drives me and doesn’t slip getting in gear it slips trying to get the power to the transmission
Thread Starter
Newbie
Joined: May 2025
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2011 glk350
and as far as I know no but I didn’t get the car with a service manual I buy and sell found this one and wanted to keep it but has some issues to wrinkle out
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Joined: Nov 2024
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GLK350, SL500 (R230), E55 (w210)
Transmission fluid on these GLKs should really be changed more often, especially since it's shared with torque converter. 50k km.
I changed at 120k km, at 150k km did it again and the oil was black, lots of sediment at the bottom of the pan.
Did another flush at 170k and oil was black again with sediment, but better. I assume there was a lot of varnish/build-up in the transmission that was still getting cleaned out.
It's too bad they didn't design the transmission pan for an easy drain... Weistec makes a replacement pan that is much improved, worth the upgrade if yours is rusty.
I changed at 120k km, at 150k km did it again and the oil was black, lots of sediment at the bottom of the pan.
Did another flush at 170k and oil was black again with sediment, but better. I assume there was a lot of varnish/build-up in the transmission that was still getting cleaned out.
It's too bad they didn't design the transmission pan for an easy drain... Weistec makes a replacement pan that is much improved, worth the upgrade if yours is rusty.
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Joined: Feb 2023
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2011 GLK 350 4Matic
Also, on the 4Matic, the "transfer case" (really more of an integral part of the transmission) shares the fluid as well, though it doesn't change the total capacity much.
