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Allison C-4 rated oil which is 10wt with correct additives. Oreilly's premium green bucket 5 gallon pail, pn 74209. Plan on needing more than 4 gallons or whatever the dash placard says, they didn't take into account for the cooler, hoses and filter capacities.

Take your external filter off (the one under hood passenger forward of trans). Cut it open and inspect pleats in filter for residue/debris. You can also send a fluid sample off to be tested for content and condition of fluid. It's most likely the clutches if Allison has tested it. The...

Have you checked your governor filter on the very back of the transmission?

I have no A2 experience. Wish I had an A2. Think I jacked the front axle up on passenger side 2-3" in order to get the trans/jack combo to roll under the toolboxes. Didn't expect that. Mine is an A1 nhc250 with 14.00-20 supersingles. Yes definitely get all the torque converter bolts started...

Well.....Simp is just a bit faster than I am. It is as easy a 4x4 1/2 ton truck if you have the correct jack that lifts to 32.5" -35" in height. You can let the air out of the tires if the jack won't go high enough....BUT get the trans on the jack and underneath the truck first. I had a...