Fleetwood V8-368 60L VIN 9 FI (1982) Automatic Transmission Fluid Pump
Fluid Pump: Customer Interest
A/T - Buzz Condition Correction
Bulletin No. T
83-75
File In Group
7
Number
68
Date
Apr. '83
NEW DESIGN PUMP ASSEMBLY TO ELIMINATE A "BUZZ" CONDITION - 1981-1982 THM 200-4R
New design pump assemblies were released for the THM 200-4R late in the 1982 model year. This new design eliminates a buzz condition that is caused
by the pressure regulator valve. The design changes involve a new pump body, pump cover, and pressure regulator valve with orifice.
When servicing the pump body assembly or cover assembly on all 1981 and 1982 THM 200-4R transmissions, a complete pump assembly must be
ordered (see chart below).
MODEL
TRANSMISSION
PUMP ASSEMBLY
YEAR
MODEL
NUMBER
1981-1982
BY
8639077
1982
AA, AP
8639077
1982
OM
8639135
1982
AH
8639079
MODEL
TRANSMISSION
PRESSURE REGULATOR
YEAR
MODEL
NUMBER
1981 & 1982
All Models
8637546
SERVICE INFORMATION
1.
Follow proper Service Manual procedures for removal and installation of pump assemblies.
2.
The solenoid and filter assembly must be removed before pulling the pump assembly from the case. Failure to follow this procedure can damage
the solenoid, filter or "O" rings.
3.
DO NOT MIX the old pump halves (body and cover) with the new design pump halves as this may create a "no drive" condition or may not
eliminate the "buzz" condition.
4.
New design pressure regulator valve listed above can be used with either new or previous design pump cover and body assemblies.
