Got 70,000 miles on the current ATF oil, so today it and the spin-on filter got changed. I also dropped the pan to see if there was any sludge and it was clean. Love this Duramax/Allison combo.
I’ve got the Ford TorqShift with the external bypass filter in a housing and it’s quite frozen. Couldn’t crack it loose with a 1/2” rachet and didn’t want to break something. Thinking about trying to use a filter wrench on the filter housing along with the rachet on the end nut. Any tips?