Gearbox oil level check for 6HP26

[@ojpsw6667]

So if its not dripping oil when I release the plug its too low, should I drain the old oil or just fill it up with new?

[@BMWhale]

Oil needs to be measured when oil temperature is between 30 to 40 degrees centigrade. It needs to be dripping in this range of temperature. It it is not dripping when temperature is set that means it is low oil and you need refill it.

[@ojpsw6667]

Okay so just a refill. No filter change?

[@BMWhale]

@ If you did everything according manual and you need upfil, then do it. Driving long time with low oil will make your gearbox deteriorate faster. 6HP26 is very patient thing but oil level needs to be at proper level. Oil filter is a part of sump. In some models can be separated. There is partial oil replacement and full with flushing while using service equipment.

[@BMWhale]

Oil in gearbox in some auto-data is mentioned that can be lifetime but in general it is recommended to do servicing about every 100 000 km. Gearbox sump inside has a two magnets for metal particles to collect. Roughly gear switching work is a sign of deteriorated solenoid valves on mechatronics module inside gearbox

[@ojpsw6667]

Where do you recommend buying solenoids?