I have a R33 5 speed in my LJ Torana & was noisey from the start so after a while i decided to rebuild it. I have almost got my box back together. If you haven't at least got a hydraulic puller kit (plus bits to modify), a small press and handy at fabrication/modification then best bet is remove the box yourself & get it rebuilt by someone. I videoed when i pulled mine apart (cose i knew it wasn't going back together that week/month). At absolute least replace all the main ball & roller bearings (replace needle rollers under each gear ONLY if they are stuffed) & all syncro's. I can't beleive the amount of people that have boxes pulled out just to replace 1 bearing only to find it the same when its back together!!! :woot: The 5th gear bush on the cluster shaft is 1 of the tightest most difficult part to remove. As mentioned in a previous post the puller parts are not available from nissan so i made my own .
Even then only just able to remove it with the hyd puller (have heard of a gearbox joints breaking the sandwich plate, i presume by trying to press the cluster shaft out of the bush & i have no doubt it would break the lip that retains the cluster sandwhich plate bearing)
Nissan won't do much without a VIN No or month/year of manufacture , so i gave all bearing No's & syncro's to Steve at WA Drive Components (top bloke ) & he went through all their kits. He recond's the bearings are pretty much the same through the R33's. He also matched up genuine syncro's.
Minor bearing kit was $270 GKN3028 Skyline 8/93- (front seal & gasket, rear seal, nylon knob on bottom of shift, ball & roller bearings, cluster thrust bearings & needle roller for input shaft/mainshaft)
Syncro's was $450 GKN3028-SYN Skyline 8/93- .
Don't press out the rear extension housing bush either unless you can source a non genuine replacement (which is my problem at the moment), Nissan only list this with the whole rear housing .
Hope this help