Noise in transmission while clutch is engaged sm465

[dmac2590]

I have a whirling/grinding noise in my transmission while the clutch is out when I press the clutch pedal in its like magic and no noise. Its the sm465 4wd with I believe the np205 transfercase. I have a clutch kit including new fork and pivot ball to put in it. I'm just not sure that's going to solve my problem. I've read a few other forums about the input shaft bearing going bad but can't find it on any images anywhere. Any and all advice would be appreciated. Thank you all.

 

[PrairieDrifter]

GebBuilt on youtube. Look him up. way better than a book being typed up here.

I would say bearings. The throwout bearing could possibly be the problem, they usually don't rattle when the clutch isnt being disengaged but I have had that happen before. I would inspect the throwout bearing first, it also could have spun on the fork.

 

[dusterdude]

Probably the input shaft bearing,i had an a833 do the same thing a few years ado.

 

[dmac2590]

Dusterdude. Where is the input shaft bearing located in the transmission? All the diagrams I've looked at not one shows the input shaft bearing. Is it technically the mains gear bearing?

 

[SquareRoot]

It's on the input shaft, thus why it's called input shaft bearing.

 

[squaredeal91]

Input bearing probably. Big yellows is horrific and sounds like the titanic going down when starting out heavy lol. I've got a replacement to go in soonish.

 

[dusterdude]

Its the bearing at the front of the trans,behind the throwout bearing

 

[Cemack]

Like everyone has said it's either the throw out bearing or pilot bearing/bushing. I will attach a picture to show where the pilot bearing/ bushing is located

 

[pduffyd]

Looking at the sm465 trans, this is the input shaft, the bearing is behind the 4 bolt cover that the clutch release bearing slides on. That cover/retainer only goes on one way as there is an oil way in it to feed the bearing.

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I agree with prairiedrifter check out GebBuilt on youtube there is a 3pt video on a full rebuild of the SM465. Worth having a couple of beers while in front of the TV.