D20 Rear Output Bearing Chewed Up

[Jambi]

What would cause my D20 rear output shaft, outer bearing to get chewed up like this? This is the second time this particular bearing got chewed up. I recently converted to an NV3550 transmission and while I had everything out I decided to rebuild my transfer case. When I first disassembled the transfer case, the rear output shaft outer bearing was chewed up as well. I measured the endplay at .003 when I put it together. Yoke nut properly torqued. I'm afraid it's going to happen again if I don't figure out what's causing it.

 

[.94 OR]

Is it getting hot?

 

[JB Fab]

Are you flat towing?
It's hard to zoom in on your picture, is the jacked-up from the race spinning?
What lubricant are you using?

 

[EPB72]

Was it blu and dry upon removal , lack of oil? and was the cage bent or did you do thet to remove the rollers,, and when filling I usually pump some oil through the speedo cable hole to fill the void in the housing ..

 

[Jambi]

I'm not sure if it's getting hot. I am not doing any flat towing. I don't think the race is spinning. I literally just drove around my neighborhood and surrounding area--maybe 4-5 times max over different days--after getting the NV3550 installed. I never ventured further than 5 miles. I was hearing odd noise when driving, but was hearing it when pushing the clutch pedal in as I was coming to a stop, so I assumed the noise was related to my transmission install. Maybe there is an issue there as well, I don't know.

I used Valvoline SAE 50w oil based on info I read in this forum. When filling I did not pump oil through the speedo hole.

The bearing was dry upon removal and the cage was bent and broken with some metal shaving inside the housing. A couple of the rollers fell out when I removed the bearing.

 

[JB Fab]

If the race spun in the housing, replace it (the housing).

 

[Timmy390]

The bearing was dry upon removal and the cage was bent and broken with some metal shaving inside the housing. A couple of the rollers fell out when I removed the bearing.

Dry bearing is the issue.......something is preventing it from oiling.....No I'm not trying to be captain obvious

Tim