I've had experience with this too, and it wil cost u basically 1k if only your 3rd syncro is gone, if other parts can cost more. IMHO get it totally recon, caus when u pull apart a gb just to change one thing u might break another thing without knowing and put it back together headach! and while your at it should look into a chutch and fly even maybe a lsd if ur rich ;D I drove around for about a year when i first noticed my 2nd gear syncro crunching. ignored it went drags hit mountains lol. about a year later went to fix it, 2nd gear syncro busted, 2nd gear was gone, first and reverse select sleve was gone too lol. your lucky yours is 3rd gear its ****loads cheaper then 2nd gear.