6th gear huge problem.
Reverse gear likes to pop out occasionally as well. Thanks for the help!
Reverse popping out is common,you can flip the synchronizer hub to fix it because it only uses one side of it.
Check and make sure the shifter is not loose and that the shifter cup bushing is in good shape.If they both check out I would suggest having it inspected by a shop or pulling it apart for inspection,parts for the T56 can get expensive fast when it breaks.







