[whited44]

Somewhere between 5 and 6 gallons. Use the allison 4 inch deep sump high capacity filters. Make SURE you get allison filters, lots of knockoffs on the internet. motor coach technician has an excellent youtube video on this topic

https://youtu.be/Xa8gGfifKyE?si=B53ySRZejq1lBUu-

I watched the video.  It was very informative.  

Allison numbers appear to be 29558329??

Next question is can I mix transynd with whatever fluid is in there??