What chassis? Work horse with Chevy engine
Or
Ford chassis and engine
Either way , the reservoir is there in the front at the pump
You need to retract the slides and Jack's
Crawl under Neath, remove the fill plug and add some fluid
No you can't do it properly with the slides out, you will need to much fluid to fill it, and it will blow out all over the place when you retract everything
You could measure out, about 4 ounces of ATF and put that in
And go for a test drive, and see if it alarms
But you have to be real careful to add only a couple of ounces per try or to will overfill it
