Shift Quadrant - Oil Seal Leakage
89isuzu05BULLETIN NUMBER SB89-05-003
ISSUE DATE May 11, 1989
GROUP TRANSMISSION
IMPULSE (JR) SHIFT QUADRANT OIL LEAKAGE
Figure 1:
Figure 2:
VEHICLES AFFECTED
Impulse (JR) models with manual transmission.
SERVICE INFORMATION
Transmission oil build-up between the shift rod oil seal and the shift quadrant housing may cause an oil leak to occur at the oil seal. In addition, if the drain hole at the front bushing becomes restricted by foreign material, it may cause leakage at the front cap plug.
This Service Bulletin contains procedures for preventing oil build-up between the shift rod oil seal and the shift quadrant housing, and for bushing replacement.
SERVICE PROCEDURE
1. Remove the shift quadrant box from the transmission as outlined in the appropriate Workshop Manual.
2. Remove the shift rod shaft from the shift quadrant box.
a. If shaft surface has irregularities that would cause excessive bearing or seal wear, polish surface with 400-600 grit silicone carbide paper.
b. If surface irregularities cannot be removed by polishing, replace with a new, improved shaft. Refer to the "Parts Information" section of this Service Bulletin.
3. Drill a 1/8 inch oil return hole into the shift quadrant box as follows:
a. Remove and discard the oil seal from the rear of the shift quadrant box.
b. Install the shift quadrant box into a bench vise or drill press vise.
IMPORTANT
Use only a 1/8 inch drill bit. Using a smaller bit will result in insufficient oil return; using a larger bit will crack the quadrant box.
c. Drill a hole into the quadrant box, centered between the edge of the bushing and the bottom of the seal recess. See Figure 1 for hole location. The hole must be drilled at a 25 degree angle, as shown in Figure 2. If the hole is not drilled correctly, oil will not return to the case.
4. Remove the cap plug from the front of the shift quadrant box. Inspect the drain hole for restrictions. If necessary, remove any foreign material restricting the drain hole.
5. Inspect the shift quadrant front and rear shaft bushings for wear, Replace worn bushings as required. Be sure that the rear bushing is installed flush with the inside of the housing (Figure 2) and does not block the oil return hole.
6. If necessary, install a new cap plug in the front of the shift quadrant box.
7. Install a new oil seal in the rear of the shift quadrant box.
8. Reinstall the shift rod into the shift quadrant box.
9. Reinstall the shift quadrant box onto the transmission as outlined in the appropriate Workshop Manual.
PARTS INFORMATION
Part No. Description
8-94221-532-0 Bushing (Front)
8-94408-661-0 Bushing (Rear)
9-09201-314-0 Cap Plug
8-94234-288-0 Oil Seal
8-94462-112-0 Quadrant Box Gasket
8-94366-284-0 Shift Rod
FLAT RATE MANUAL UPDATE INFORMATION
OPERATION OPERATION TASK TIME ADDITIONAL INSTRUCTIONS
NUMBER
Shift Quadrant 050339 Repair 1.9 Includes: R&R shift lever & boot
Includes: R&R shift rod
Includes: Repair shift rod shaft
Includes: Repair shift quadrant box
Includes: Replace front and rear bushing if required
Includes: Replace oil seal
Includes: R&R other components as necessary