Rattling From Gearbox (rb20)

[ToF]

Hey all,

Last weekend my mate and I installed a 2nd hand RB20 box. That went all good but once we started it there was a rattle.

This rattle is present anytime the input shaft is spinning. ie Any gear while the clutch is out.

Can't really tell if it rattles in 4th due to road noise but it definitely rattles in Neutral, 1st and 2nd according to RPM.

Other than that it seems there is no whining or that loud bearing (forgot which one) noise with the clutch out which is common for all Skylines.

Does anyone know what could be making the rattling noise and if it will cause further damage the more I drive it?

Put it simply, is my box f!@#ed?

Thanks

[stasis]

when you put the gear in nuetral and you step on the clutch oes the rattling goes away? If it does is the clutch bearing

[ToF]

Yes when the clutch is in there is no rattle.

[stasis]

most likely your trans bearing check it and dont step on the clutch when you are in a red light save the bearing

[FATGTS-R]

What actually happens, as in damage, when this bearing lets go?

I went on a long drive and at the end of it developed a loud rattle from the gearbox. When I pressed the clutch pedal down the rattle disappeard and was told it was my thrust bearing on its way. I managed to get the car home, 200kms, and the rattle got louder and louder but I made it. Didnt drive it for two months but when I decided to take it round the block as soon as I dipped the clutch pedal to roll around the roundabout to come back the wheels violently locked up and it stalled. I was in second at the time but from what I can tell the box is locked in fourth.

Doesnt matter where I throw the lever its stuck in fourth?

[ToF]

Errr that doesn't sound good.

[ToF]

Anyone have any more detailed information...

"Trans bearing" is kind of too broad for my liking, there are hundreds of bearings in the box, which one is it and will it cause further damage?

Thanks guys

[ToF]

OK, I'll make an educated guess it's the input shaft bearings... can anyone tell me if leaving it rattling will cause any further damage to other parts of the box?

Thanks