Its an early 4l80E in a one ton chevy. 92 model.
I bought the dang thing over a year ago and it has been sitting at the parts store.
Every transmission on the farm is bad or going bad. I sent it to the shop to get me caught up!
I have a 4L60E in my half-ton, so far so good. Both of them are nothing more than the old 700R4 with some additional electronics, and yours has a little beefier parts. That series of transmissions have had a rough history. I feel for ya.
My old Cummins Ram dropped a 48RE about every six months. Be glad you don't have one behind a Cummins. They don't last long.
As much as it pains me to say it, Ford transmissions seem to hold up pretty well behind their diesels... now their 6.0 and 6.4 Powerstrokes are another matter.
