Will a Chevy 84 truck transmission interchange with a 88 Chevy truck?
The 1984 700R4 will interchange with a 1988 700R4. The lock-up
harness would have to be modified, changed or have a hydraulic
lock-up kit installed. An easy fix would be to put the harness and
swithes from the 1988 transmission into the 1984 transmission. The
1984 transmission is a weaker design but a working transmission
will get you going.