yeah the grinding your describing is definitely a bad synchro. Expect to be buying the 250$ ford racing t5 kit from summit and a new second gear. If the teeth on the gear have been ground half as much as mine were when i pulled it out, youll need to replace it. Dont waste your money on the crappy rebuild kits on ebay. I did and had to rebuild my tranny twice. But, the rebuild itself is not that hard if you have some knowledge and patience. Expect to do every step 3 times to correct putting something in wrong, and take your time. however, itll still be less than 400 bucks. I got a second gear off ebay from reman express and the gear has held up great.