Ok , guess it is personal choice.
Put regular dextron in 1992 Newmar 2015. 2018 changed all filters went synthetic so far so good[/QUOTE]
Any idea of the transmission filter sizes. None of my Allison books part numbers are any good. looked online but filters for this transmission are not listed Probably going synthetic but need some long life filters. It does have a Baldwin external filter Bt-230. It seems to be a cheap filter in price for a 150.00 Transmission oil change.
1992 Gulf Stream Sun Voyager 5.9 diesel pusher.
I like the simplicity of the drivetrain.
totally updated 20018 and 2019.