- Joined
- Jan 31, 2016
- Messages
- 979
- Location
- Fleet, Hampshire
- Car
- 2008 CLK 350 Sport Cab and 2021 BMW 520i M Sport Saloon
Hello,
I've got a 2008 CLK 350 with the 7G tronic box fitted. Just recently I have noted that when starting and pulling away from cold, the gear box slips on the first change (and possibly the second) of the journey. By "slips" I mean that it seems to over-rev slightly on the change before selecting the next gear. Only does it on the very first change as I pull off the drive. And very occasionally the second.
After a couple of gear changes (i.e. by the time I reach the end of my road), it's all fine and it never does it again for the journey. Park up, go shopping, and it's fine on the return journey. (as I guess the box is still warm).
So it seems to be when the car has sat for a long time and is stone cold from starting. It often sits for two weeks between drives.
It doesn't really bother me as it does it once or twice and never again for the entire journey. But does anyone know if this is a common issue and what the problem is?
In all other ways the box is 100% perfect with zero judders, super smooth changes and no apparent faults.
Car is 9 years old / 48k miles.
It had the auto box oil and filters done at 37k miles but perhaps there's some new crud in there which is causing this glitch (it was done two years ago - car does few miles annually).
Maybe I should drop the oil and filters from the box at the next service....unless anyone knows of a specific fault that would cause this??
Any thoughts appreciated if this is something you have come across before!
Thanks!!
I've got a 2008 CLK 350 with the 7G tronic box fitted. Just recently I have noted that when starting and pulling away from cold, the gear box slips on the first change (and possibly the second) of the journey. By "slips" I mean that it seems to over-rev slightly on the change before selecting the next gear. Only does it on the very first change as I pull off the drive. And very occasionally the second.
After a couple of gear changes (i.e. by the time I reach the end of my road), it's all fine and it never does it again for the journey. Park up, go shopping, and it's fine on the return journey. (as I guess the box is still warm).
So it seems to be when the car has sat for a long time and is stone cold from starting. It often sits for two weeks between drives.
It doesn't really bother me as it does it once or twice and never again for the entire journey. But does anyone know if this is a common issue and what the problem is?
In all other ways the box is 100% perfect with zero judders, super smooth changes and no apparent faults.
Car is 9 years old / 48k miles.
It had the auto box oil and filters done at 37k miles but perhaps there's some new crud in there which is causing this glitch (it was done two years ago - car does few miles annually).
Maybe I should drop the oil and filters from the box at the next service....unless anyone knows of a specific fault that would cause this??
Any thoughts appreciated if this is something you have come across before!
Thanks!!