K 30 P/U 4WD V6-262 4.3L (1985)
FIGURE 3
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 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
