Gearbox and diff oil
- Thread starter taz1966
- Start date
Ross at RBM changed my gearbox and diff oil when I had an Inspection 2 in 2020 but I don't know what he used.
But I did get him to remove the CDV and don't have any issues with the change from first to second so if your car still has it I'd remove it!
But I did get him to remove the CDV and don't have any issues with the change from first to second so if your car still has it I'd remove it!
Mr Tidy said:
I have done the CDV delete and although it has helped still not as you would expect.
I know this has always been an issue as when the M was first released people left right and centre were taking there cars back and complaining
At first BMW actually replaced a few under warranty.
I’ve just had redish change the fluids (bmw) along with ate 200 brake fluid and it’s never been better.
I’ve tried various places for the fluid changes and even had the clutch bled a couple of times but for whatever reason, this change has been great.
The only other time it was this good was when I put Royal purple in along with brand new Vibratecnics engine mounts and rogue gearbox mounts. For that first week or two it was ‘perfect’ but sadly the positive effect didn’t last long so I went back to bmw fluids.
If your driveline mounts are softening I’d say this will have just as big an effect on the shift as the fluid, possibly more, so it might be worth considering replacements.
The redline mix you mention has had some positive reviews but I’ve not tried that yet.
I’ve tried various places for the fluid changes and even had the clutch bled a couple of times but for whatever reason, this change has been great.
The only other time it was this good was when I put Royal purple in along with brand new Vibratecnics engine mounts and rogue gearbox mounts. For that first week or two it was ‘perfect’ but sadly the positive effect didn’t last long so I went back to bmw fluids.
If your driveline mounts are softening I’d say this will have just as big an effect on the shift as the fluid, possibly more, so it might be worth considering replacements.
The redline mix you mention has had some positive reviews but I’ve not tried that yet.
taz1966 said:
I put this in mine on the last service and it works fine. Filled up with MTF then as much D4 as will go in. Had no issues on road or track personally. I didn't really have an issue before mind you, I don't know what the previous owner had in it.
As others above I had new engine mounts and gearbox mounts (not strictly necessary) put in at the same time so YMMV.
CDV delete I noticed no difference.
