The T.V. exhaust valve, which is shown in the 1982 and 1983 service manuals, was never released into production on any THM 700-R4 transmission.
Delete any reference to the T.V. exhaust valve in the 1982 and 1983 service manuals.
Should the T.V. cable become disconnected or even break, the resulting condition would be early or soft shifts.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.