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Jim Hawkins · 01-10-2023, 09:36 PM

[QUOTE=Lenny5160;673612]I'm surprised to not see a mention of Allison TranSynd in this thread. It seems to be the "gold standard" in the bracket/Super-class world.[/QUOT

This is what I use in the race car, service truck and the Duramax truck. A friend of mine works on Allison transmissions and says it is a extended interval oil, 200,000 miles. Works for me.

01-10-2023, 09:36 PM	#27
Jim Hawkins Member Join Date: Jan 2010 Posts: 193 Likes: 87 Liked 114 Times in 34 Posts	Re: Best transmission fluid? [QUOTE=Lenny5160;673612]I'm surprised to not see a mention of Allison TranSynd in this thread. It seems to be the "gold standard" in the bracket/Super-class world.[/QUOT This is what I use in the race car, service truck and the Duramax truck. A friend of mine works on Allison transmissions and says it is a extended interval oil, 200,000 miles. Works for me.