Sigot bearing

[kiwinoz]

Gearbox gurus, what noise would I expect to hear if this little thing has worn? I have a pathfinder, 2.4 petrol, 5 spd. The g/box bearings were all replaced about 18 months ago (40,000k) and I did not change this bit. Would it sound like gearbox worn? Also, do many of you Terrano guys have probs with your Transfer Cases? I haven't read about many issues with them, like the g/box.
I'm trying to track down a noise I thought was gearbox bearings, but it's still there after replacing them. Seems there mostly under load, or when I back off (backlash somewhere?) in all gears, but in 4th/5th other noises start to cancel this one out.

[Crash bandicoot]

1st .pinion bearing rear diff. climb under and give the rear drive shaft a wiggle.

2nd . carrier bearing. same as above.

3rd. when i built my Rb30det powered hilux the 3.0 block from was an auto VL commodore, mated to a nissan skyline GTS4 bell housing and patrol trans. completely forgot about the spigot bearing, the input shaft from the G/B didn't even touch the larger spigot bearing on the auto blocks crankshaft.

4th clutch fork bearing...could be if a new clutch kit wasn't used when reinstalling the gearbox.

5th selector fork inside the gearbox is rubbing on a sprocket.

6th never had any issue with nissan's transfer systems

[slide]

Seems there mostly under load, or when I back off

Sounds like a diff problem with that description.
Maybe check the oil? probably all metallically if its been noisy for 40,000km.
Transfers are pretty strong, and don't give much fault.
Spigot (when bad) is noisy when clutch pushed. When clutch engaged then inputshaft and crank spin at same speed. Nissans use a brass bush tho, not a bearing. Potentially they can wear and then allow play in input shaft.
Nath

[The Stranger]

Assuming spigot bearing is what i think it is, the little bearing in the end of the crank then surely it is only in use when the clutch is disengaged. When the clutch is engaged the crank and spigot spin at the same speed dont they? If im right then you wont hear the spigot bearing when the vehicle is moving.

[fullthrottle]

Definately replace that little bugger if you can.
I've had the needle bearings come apart from their casing and the input shaft makes a lovely sound.

A good trick to get an in-tact spigot bearing out......
Get an old input shaft.
Squirt greese into the spigot bearing hole.
Put the input shaft in and give it a mild belt with a mallet.
The spigot bearing should end up hydraulicing itself out.