Posted by Dave [172.68.133.135] on Tuesday, August 06, 2019 at 06:47:59 :
I’ve torn this 1/2 ton tranny down to every bit and am examining every surface, and taking measurements to determine wear and out of roundness.
For instance, on shafts, I’m actually comparing the surfaces where the bearing ride to an area on the shaft where there is no wear area.
Aside from a few gear teeth on the cluster having some pitting, the bearing surfaces inside the cluster look pretty decent. As does it’s shaft.
So far everything really looks pretty decent.
With the exception of this main shaft “nose” piece that rides inside the input shaft.
It’s got some pitting. See pic. I took my calipers and measured and it’s a uniform diameter that is not scalloped or egg shaped. It’s still round.
Just this pitting.
An opinion so far tells me this would NOT cause the “grrrrrrrring” noises I’m experiencing while idling in neutral, foot off clutch.
But I remember the importance of this main shaft “nose” when I built my jeeps T90 Tranny and was told anything under a near perfect polished surface would lead to noises in operation.
I’m thinking the same applies here?
Pic to follow.
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