Manual transmission whine?

Thank you for the reply, Ken. I actually just changed the manual transmission fluid yesterday with redline mt85 hoping that would solve the issue, but it did not.

Thank you. Is there any other possible culprit that could be causing the sound? I'd hate to tear into it, replace that bearing, put it all back together and the whine will still be there. On an interesting side note, in my online searching I found multiple cases of people complaining about a whining noise coming from their 6mt in their G37. Many people said the dealership replaced the entire transmission at first under warranty, but the complaints became so frequent that Infiniti finally said the 6mt may produce a slight whine and that it's normal. I cannot verify any statements made by Infiniti; these are just things I've read on different forums posted over the years.

First - second while still running cold. It gets a little quieter when warmed up, but not much.

This is a cold start, clutch in, clutch out, repeat. I have put just under 1,500 miles on the car since replacing the engine, clutch etc. It has sounded the exact same since mile 1.

Apologies for the delayed response. I found no obstructions between the bell housing and block. Given the fact that I have now put over 1,500 miles on the vehicle and the sound remaining the same since day 1, would you say the bearing needing to be replaced is imperative? I have no doubt it needs to be done; my holdup is the amount of money I've just spent to get it back on the road. I can't imagine the labor is going to be any less than the engine / clutch replacement. (I understand any response given is solely an opinion and part of a hypothetical best case / worst case scenario).

So, basically, bearing failure is inevitable. Would you be able to give me an estimated labor cost on just having the bearing replaced? I can't find anything online that specific for a labor estimate. I know the bearing is about $70.00, I was told that the concentric slave cylinder / release bearing assembly must be replaced whenever the engine and trans are separated due to contamination (and flawed design), that was $360.00 (HD ver. W/ stainless, insulated lines), another OE clutch master cylinder $180.00 (require warrantying slave cylinder), new clutch and trans fluid $120.00 (pricing is for my own visual reference), plus vehicle down time. It was only about 2 months ago that the initial repairs cost me about $6.5k, hence why I'm reluctant to get the bearing done immediately.