Originally Posted by fast68
is there a single casting line that arches over the area where the two cooler line fittings are on the transmission case?
if so then its a 1987 up
there are small stamped in code digits on a small flat spot right above pan rail somewhere
OR on a small flat spot around bellhousing area one side or the other of the trans case
or also possibly but unlikely at near the trans rear mounting pad
but this was really actually only on most 4L60E trannies though
and if it has electronic small style VSS speedo then its a 1991 up
MD8 is simply the general RPO code for 4 speed auto trans
and the casting code starting with 8 is a VERY general trans case casting code
which is useless as well and used on lots of years of 700's
There is a casting line like you described.