Check the play of the release bearing by spinning it by hand. If there is excessive play or noise, replace the release bearing.

NOTE: The release bearing is packed with grease. Do not wash it in solvent.
M/T Differential Carrier/Final Driven Gear Replacement (M/T)
Loosen the bolts in a crisscross pattern in several steps, then remove
the final driven gear (A) from the differential carrier (B).
Install the final driven gear with the cham ...
Synchro Sleeve and Hub Inspection and Reassembly (M/T)
Inspect gear teeth on all synchro hubs and the synchro sleeves for
rounded off corners, which indicate wear.
Install each synchro hub (A) in its mating synchro sleeve (B), and che ...
M/T Differential Thrust Clearance Adjustment (M/T)
Special Tools Required
Driver Handle, 40 mm I.D. 07746-0030100
Remove the left driveshaft side oil seal from the transmission housing.
If you remove the 80 mm shim (A) from ...