A/T - New Pump Assembly
Number 85-7-31 Date 7/85Subject: SERVICE PARTS INFORMATION ON NEW PUMP ASSEMBLY
LATE 1984 & ALL 1985 THM 700-R4 MODEL TRANSMISSIONS
FIGURE 1 - THM 700-R4 TRANSMISSION I.D. LOCATION TOLEDO, OHIO:
FIGURE 2 - New And Old Design Pump Cover And Body:
FIGURE 3 - Pump Cover And Body:
On June 28, 1984, or Julian Date 180, all models of the 1984 THM 700-R4 transmission (refer to Figure 1) were built using a new pump assembly to reduce pump fluid leaks. This pump change is also used on all 1985 THM 700-R4 transmission models.. Refer to Figure 2 for identification of the casting changes and Figure 3 for the reference casting number locations.
When replacing the new pump body that is used on all 1985 THM 700-R4 transmissions, use service package part number 8649950. The previously released service package, part number 8642986 MUST NOT be used in 1985 model transmissions as low line pressures may occur.
The pump body and cover are not serviced separately in 1982 through 1984 THM 700-R4 transmissions. Refer to the chart below for 1982 through 1985 model year THM 700-R4 service parts information.
MODEL YEAR(S) PUMP BODY PUMP COVER PUMP ASSEMBLY
1982 through Not Not See Note 1
1984 Available Available
1985 8649950 See Note 2 Not Available
Notes: 1 - Use the WDDGM parts catalog for PUMP ASSEMBLY part numbers based on model application.
2 - Use the WDDGM parts catalog for PUMP COVER part
numbers based on model application.
Refer to the appropriate Service Information Manual for removal and installation procedures.