Forgot to mention...I've been doing some reading on the Transynd fluid. It's made by Castrol and Allison had/has a deal with them for the fluid and was the only fluid approved so Castrol had/has a nice "niche" with Allison as Allison requires TES-295 requirement but the testing procedures are vague and Allison does not offer guidelines for the testing. All of this information is according to Amsoil's website. Amsoil has made a "copy" of Transynd based on the same chemical make-up by reverse engineering.
At any rate....through the Amsoil website you can buy 2-2.5 gallon jugs for $154. If you buy the preferred customer deal for $10...you can get 10% off...so you could actually get 5 gallons of Amsoil's equivalent for $148.60 plus shipping which would come out to $29.72/gallon.
I don't have any exact pricing for the Transynd fluid yet....anyone care to help???