Let Me Know if You Have Allison Transmission Fluid Questions

I have a 4000 series (circa 2001)in my coach. Transynd was installed about 18 months ago. By the time the 4 years has passed, I'll be lucky to have 20 to 25K miles on the Transynd.

Will you share with us how and where to get the Transynd tested and what results we should be looking for? At Camp Freightliner they were pretty insistent that the oil needs to be changed at 4 years. That seems wasteful if there is a good way to ensure that it is still functioning correctly.

Thanks for sharing your knowledge with us,

Grant