Daewoo KORANDO Service Manual page 1141

9. Take apart the three synchronizer assemblies and check :
The 1-2 synchronizer.
The 5th blocking ring.
10. Check the fit between the hub and sleeve of each
synchronizer
Excessively tight or loose hub-to-sleeve fit.
Wear of the cone clutch surfaces of brass blocking
rings and gears.
11. Measure the clearance between the blocking ring and the
speed gear
New 1-2 blocking ring : 0.87-1.4mm
New 3-4 blocking ring : 0.88-1.5mm
Notice
Excessive wear of the blocking ring or the speed gear cone
surface will cause shift block-out gear clash.
MANUAL TRANSMISSION 5B-43