The blocking ring is part of the synchronizer assembly. If it is bad, that would give you the grinding that you describe...unless you are willing to double-clutch it like driving a semi. You can read all the details and see photos at:
http://www.autosite.com/garage/subsys/bamant01.asp
Are they going to replace the entire tranny or just repair the failed parts? Either way, I doubt the new transmission will hurt fuel mileage very much during break-in. Good luck with the repair.
http://www.autosite.com/garage/subsys/bamant01.asp
Are they going to replace the entire tranny or just repair the failed parts? Either way, I doubt the new transmission will hurt fuel mileage very much during break-in. Good luck with the repair.