Reverse Check Sleeve: Inspection

WARNING: This page is about a different car, the 2021 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Make sure the cutout of the reverse accent shaft is aligned with the opening in the reverse check sleeve.
Turn the cam by hand to check for smooth rotation.
Move the cam and shaft all the way toward the plate, and make sure it releases.
If the cam does not return properly, replace the reverse check spring. If the shaft does not return, check for scratches on the inner surface of sleeve. If the sleeve is in good order, replace the spring.

Courtesy of SUBARU OF AMERICA, INC.
Select a suitable reverse accent shaft and reverse check plate. Ref. to MANUAL TRANSMISSION AND DIFFERENTIAL (5MT)>REVERSE CHECK SLEEVE>ADJUSTMENT .