SHIFT CONDITIONS / THM 700-R4 ADJUST T.V. CABLE/NOT CORRECT

MODELS: 1982-1983 LIGHT DUTY TRUCKS WITH THM 700-R4 TRANSMISSION

Some 1982 and 1983 THM 700-R4 transmissions may exhibit erratic shift conditions that adjusting the T.V. cable will not correct. The erratic shift condition may result from a sticking throttle valve. Check for a nick on the throttle valve sleeve in the area of the coiled spring locating pin. (Figure No. 1)

Before servicing any 1982 or 1983 THM 700-R4 transmission for this erratic shift condition, three preliminary checks should be made first. Check the transmission oil level, T.V. cable adjustment, and oil pressures. Refer to your service manual for proper specifications. If these checks are correct, refer to the repair procedure below:

REPAIR PROCEDURE

1. Remove the throttle valve train from the control valve assembly (Figure No. 1).

2. Inspect the throttle valve and throttle valve sleeve for nicks or burrs. Remove nicks or burrs with crocus cloth.

3. Insert the throttle valve into the throttle valve sleeve and inspect for freeness of the valve in the sleeve.

4. Reassemble the throttle valve train into the control valve assembly.

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.