Regal V6-252 4.1L VIN 4 4-BBL (1983)
Fluid Pump: All Technical Service Bulletins
A/T - Oil Pump Rotor & Slide Update
Bulletin 84-7200-3
Date
April '84
Ref. No. 84-209-7200
SUBJECT:
SERVICE PRDCEDURE FOR REPAIR OR REPLACEMENT OF THE OIL PUMP ROTOR AND SLIDE
MODELS AFFECTED: ALL THM 200-4R TRANSMISSIONS
Beginning mid November, 1983, service parts became available to service the oil pump rotor and slide of the pump body assembly, on all THM 200-4R
transmissions. This service procedure on all THM 200-4R transmissions must be followed to assure proper end clearance on the oil pump rotor and
slide.
SERVICE PROCEDURE:
NOTICE:
DO NOT attempt to service the oil pump rotor if either the pump body pocket or pump body cover surfaces are scored. Servicing of the oil
pump rotor and slide should be performed ONLY if the selective pump rotor, or the slide show wear.
FIGURE 1 - THM 200-4R - OIL PUMP BODY ASSEMBLY
1.
Disassembly of The Oil Pump
A.
Disassemble the oil pump body assembly following procedures outlined in the service manual. Figure 1 is an illustration of the THM 200-4R
oil pump body assembly.
FIGURE 2 - GAUGING ROTOR
2.
Selecting the Pump Rotor and Slide
A.
Use a micrometer to measure the original pump rotor and slide thickness accurately (Figure 2 ). To obtain the most accurate reading,
