722.6 - How much abuse can take?
#1
722.6 - How much abuse can take?
Hello everyone,
I would like to use my Clk320 W208 as a track days car but after reading a lot of contradictory things about the 722.6 gearboxes i have second thoughts.
Overheating, failure, lag, engine brake bla bla![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
SO, what do you think/heard/know about how this type of gearbox handles stress?
I just changed the atf, filter, pan gasket - everything works as it should, it doesn't have leaks or other problems but i am thinking if it can take several hours per session of agressive driving without blowing up.
![Confused](https://mbworld.org/forums/images/smilies/confused.gif)
Let me know what are your thoughts.
I would like to use my Clk320 W208 as a track days car but after reading a lot of contradictory things about the 722.6 gearboxes i have second thoughts.
Overheating, failure, lag, engine brake bla bla
![nix](https://mbworld.org/forums/images/smilies/nixweiss.gif)
SO, what do you think/heard/know about how this type of gearbox handles stress?
![naughty](https://mbworld.org/forums/images/smilies/naughty.gif)
![Confused](https://mbworld.org/forums/images/smilies/confused.gif)
Let me know what are your thoughts.
![Thankyou](https://mbworld.org/forums/images/smilies/thankyou.gif)
#2
MBWorld Fanatic!
I dont know what you have read but these things are pretty indestructible. With a 320 I would be shocked if it had a failure that was not do to lack of maintenance.
#3
Junior Member
I think you might spend several hours at a track during a session but there's no way you spend hours of actual track time. 15 minutes, then you sit around for a while, the engine, brakes, transmission, everything cools off, rinse, lather, repeat. I'd not sweat it. I've read these 320 CLK transmissions are the same transmission is used mated to engines with a hell of a lot more power than our 320s.
#4
Newbie
Join Date: Dec 2017
Location: Florida
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W220 S500, W208 CLK430
The 722.6 is most definitely a slow shifter, but they can take some abuse. Both lack of maintenance abuse (typically, at least) and hard driving abuse. I would be genuinely surprised if you blew it up with a 320.
#5
Thank you for your input. ![Thankyou](https://mbworld.org/forums/images/smilies/thankyou.gif)
I have changed the atf with filter and pan gasket and checked the connector for the famous leak (no issues).
So I can go confident on a track day now.![drive](https://mbworld.org/forums/images/smilies/driving.gif)
All the best and Merry Christmas!
![Thankyou](https://mbworld.org/forums/images/smilies/thankyou.gif)
I have changed the atf with filter and pan gasket and checked the connector for the famous leak (no issues).
So I can go confident on a track day now.
![drive](https://mbworld.org/forums/images/smilies/driving.gif)
All the best and Merry Christmas!