Is it the stock type oil gauge if so it either is being pinched when the engine moves under torque, or its opening up a leak in the line. If its an electrical gauge the wire is broken and pulled apart by engine under torque.

Transmission parts
http://fatsco.com/


Kicking self for selling off my Taskforce trucks.
Still looking for an LCF or conventional big bolt in decent shape.


As of 10-26-2022, A 55.2 Taskforce long bed now the work begins