S15/T15 Jimmy 2WD L4-119 1.9L VIN A 2-BBL (1983)
FIGURE 3 GAUGING ROTOR
2.
Selecting the Pump Rotor and Slide
A.
Use a micrometer to measure the original pump rotor and slide thickness accurately (Figure 3) . To obtain the most accurate reading, measure
on flat undamaged surfaces. The oil pump rotor and slides for the THM 200-4R and the THM 700-R4 transmissions are the same.
B.
Using the original part measurement, order replacement parts according to the following selective charts.
CHART #1
ALL THM 200-4R AND 700-R4 SELECTIVE PUMP ROTOR
P/N
THICKNESS IN MM
THICKNESS IN INCHES
8634091
17.948 - 17.961
0.7066
-
0.7071
8634092
17.961 - 17.974
0.7071
-
0.7076
8634093
17.974 - 17.987
0.7076
-
0.7081
8634094
17.987 - 18.000
0.7081
-
0.7086
8634095
18.000 - 18.013
0.7086
-
0.7091
CHART #2
ALL THM 200-4R AND 700-R4 SELECTIVE PUMP SLIDE
P/N
THICKNESS IN MM
THICKNESS IN
INCHES
8634081
17.948 - 17.961
0.7066
-
0.7071
8634082
17.961 - 17.974
0.7071
-
0.7076
8634083
17.974 - 17.987
0.7076
-
0.7081
8634084
17.987 - 18.000
0.7081
-
0.7086
8634085
18.000 - 18.013
0.7086
-
0.7091
NOTICE:
The replacement part will provide the same clearance that the oil pump assembly was originally built with. The proper end clearance
specification is 0.020 to 0.050 mm or (.0008") to (.002") for the 200-4R and the 700-R4.
C.
Hone both sides of the replacement rotor and slide to remove any burrs, and measure the replacement parts with a micrometer to assure proper
selection.
NOTICE:
Incorrect rotor selection could result in a damaged oil pump assembly, and/or low oil pressure. Incorrect slide selection could result in
incorrect line pressure.
3.
Assembly
A.
Reassemble the oil pump assembly following procedures outlined in the service manual.
B.
After assembling the oil pump onto the transmission install the converter and check for proper rotor and slide clearance by turning the
converter. The converter should turn freely. If the converter does not turn freely, recheck the pump rotor and slide selection.
C.
Install the transmission into the vehicle.
D.
Before road testing the vehicle, install an oil pressure gauge into the transmission and check oil pressure. Refer to the service manual for oil
pressure specifications.
