11-07-2020, 10:16 PM
It's quite possible there is no real damage (presumably you weren't going very fast when it locked up?) so it may simply be a matter of stripping down and re-assembling. If similar to A7 gearboxes they are not nearly as complicated as that might sound. Likely new detent balls or at least springs will be required, a good clean up, and perhaps new bushes / bearings to address any end float. There's only really one way to find out what needs doing. I wouldn't be in a rush to replace the box unless the one you've got is somehow beyond repair.