I just bought an ATS pan for my 4R100 trans. I was hoping it would have something in the box that gave the capacity of the new pan. Since there was nothing, I called ATS and asked how much ATF it held, and was told it would hold 23-25 quarts total, including the torque converter. That's the only answer I got from them. Has anyone installed their pan? I'm guessing it would hold 13 qts like the Bully Dog pan, but I want to be sure before I pull the old one off.

 

I think that when you drain just the Trannypan, you'll only get out around 8 quarts or so. Thats how much came out from mine when I did the sonnax upgrade!

 

5 quarts extra fluid capacity
http://www.atsdiesel.com/ATSWebsite/...rd/TranPan.asp

 

Went I bought my Mag-Hytec pan, They told me it holds 7.5 qts. over the stock pan. An the stock pan holds 6 qts. I'd put 8-10 qts. and keep checking it as you go.