I have a Detroit 671 with a Allison M15 gearbox
Have been having problems engaging the forward gear
is being airated I think due to low oil
I have been told to overfill past the full mark on the dipstick, I have done this and when I check the oil when the engine
is running it is at the low mark.
My issue is do I again add oil and have the oil level 50 mm above the full mark when engine
is not running.
That just sounds just a little extreme.