M/T - Improved Synchronizers

BULLETIN NUMBER ISSUE DATE GROUP
SB87-05-001 February 20, 1987 TRANSMISSION
IMPROVED TRANSMISSION SYNCHRONIZERS (5-SPEED MANUAL TRANSMISSION)
VEHICLES AFFECTED

All Isuzu models equipped with a 5-speed manual transmission.

SERVICE INFORMATION

Improved transmission synchronizer blocker rings can be installed in 5-speed manual transmissions to cure gear clash.

Replace the blocker ring associated with the complaint and inspect its main shaft gear. For example, if clash is evident on a 4-3 downshift, replace the 3rd gear
blocker ring and inspect the main shaft 3rd gear. If clash is also evident on a 3-4 upshift, replace the 4th gear blocker ring and inspect the main shaft 4th gear. Replace the main shaft gear only if wear is evident.

PARTS INFORMATION


Part No. Description

8-94463-829-0 Blocker Ring
(1-2 Synchronizer Assy.)

8-94463-830-0 Blocker Ring
(3-4 Synchronizer Assy.)