Transynd Transmission Oil

[RVandgolf]

I see all the talk about Amsoil but see nothing about TranSynd for the transmission. Does anybody use it? If not why not? It is the one Allison recommends.

Thanks for any comments.

2002 2500HD Crewcab SB white with a US Gear Decelerator exhaust brake to help slow down when towing my 34" 11,500 lb Holiday Rambler 5th wheel.