In mid 1987 GM built some weird combos on the 700r4... early 700r4 had no aux v-body and transfer tube...
then they used the early design main v-body with the aux v-body and transfer tube...
then late 1987 they used the updated main v-body with aux v-body and transfer tube.
Different check ball locations per main v-body design and aux v-body or not. Gm was trying to act like Ford or something in 1987 with the 700r4 transmittin
Yesterday is history.