ron.dittmer wrote:
Rear disk brakes became the standard for the E350 a few years after 1997, maybe when the E450 was introduced.
The E-SuperDuty, which was renamed to be the E-450 after a few years, came out in the 1998 model year from what I can suss out; certainly not later than that. My 1998 E-SuperDuty based motorhome has four wheel disc brakes (and they are perfectly acceptable at stopping the vehicle). I have no idea if that's when the E-350 got them or not, nor if possibly different variants of the E-350 differed in that respect--say the dually versions having disc brakes while the single-wheel ones still had drums, for example.
(As an aside, it can be a bit irksome to try to look up parts for the E-SuperDuty as many of the parts store computer systems seem not to know about the existence of that model under the name.)
