Parisienne V8-305 5.0L (1985)
Fluid Pump: All Technical Service Bulletins
A/T - THM 700-R4 Pump Whine or Moan
Number
87-7-11
Date
1/87
Subject:
PUMP WHINE OR MOAN
1985-87 FIREBIRD, 1985-86 PARISIENNE AND 1987 SAFARI MODELS WITH THM 700-R4 (MD8) TRANSMISSION
Figure 1 - TRANSMISSION ID NAMEPLATE
Whine or moan on the above models (before Julian date 301) THM 700-R4 transmission may be caused by line pressure instability in a seven-vane
pump design. A ten-vane pump design to provide stable line pressure is now used on all 1987 THM 700-R4 models and available to service a 1985
through 1987 model transmission..
Date of Change (Figure 1)
October 28, 1986, Julian date 301, ten-vane pumps for all 1987 THM 700-R4 production and Service Replacement Transmission Assembly (SRTA)
models.
Service Action
When using the ten-vane pump body assembly to service a THM 700-R4 transmission, mate the new pump body to the pump cover taken from the
transmission's existing oil pump.
