Hmm that wouldn't neccesarily be oil but moreso the actual sycnros on the gears..
U can put some nulon gearbox additive and change the oil, you should notice less crunching, but generally its mechanical and that the 3rd gear is nearly gone..
thx man....going to the mechanic today to have a look n see what they say about it......how much did you get your short shift for? planning to buy one but cant find where to get them in sydney