UPDATE October 2022
Info added to initial first few posts:-
I like to change my MQ250 gearbox oil as per the "old" service schedule - every 5yrs. As its 5yrs since I originally did the gearbox oil change, I now tried to fill via the "old" fill/level plug to see if this would work, if at all. The answer is NO!!
I went for a short drive & got the engine oil upto 96C & did lots of gearchanges to get the gearbox oil hot as well. I then let it drain for 3hrs & got 2.1lts out so there is no real need to drain it for longer.
Basically, after pouring in 1.3lts of oil via the "old" fill/level plug it started to come out of the fill/level hole! Therefore, the gearbox must be tilted forwards with the hole now facing downwards compared to when it was used previous to the MQB platform. This is different to the ERWIN/VAG workshop books which give the impression that the hole is pointing upwards!..Unless its "got lost in translation" from German!
I note that when used previously, the 02S gearbox had a refill of circa 1.9lts of oil. This tying in with the 1.9lts of oil that I drained out of the gearbox when I first changed it in 2017. However, ERWIN/VAG still state for my MQ250 gearbox 2.3lts for a full strip down/rebuild & 2.1lts for a refill, & I got 2.1lts out this time, as thats what I poured in last time!
I don't know why, but it requires more oil now, for some as of yet unknown reason!
I will state that the old oil still looked as clean/clear as the spare unused oil I still had in the bottle, so thats good news!
I also decided to try a different oil this time around so......After speaking to their tech dept & the tech dept of the oil supplier, I have refilled with:- Millers Oils Motorsport CRX 75w NT+
So thats a fixed 75w to API GL-4 with their "Nanodrive" ester technology. It has NOT been sent to VAG for approval, as they don't do this for their motorsport oils. However, it has similar characteristics to their "normal" Millers Oils XF Premium MTF 75w which is approved to the VW specs 052 512 A2, & G 052 527 A2.
Initial observations:-
- The car is even quieter, with less transmission noise generally, & especially under heavy acceleration in 3rd & 4th gears (when overtaking).
- The car freewheels more when you come off the accelerator. In fact on a flat straight at 60mph there is little initial difference when you come off the accelerator & have the clutch depressed or not!
- The gears slide in better. When moving from 2nd to 3rd or 4th to 5th, you would have to fully push the gearstick forwards into the higher gear from neutral. Now once the gearstick is out of the lower gear, across neutral & just edges into the higher gear…..it just drops straight in!