My transmission is whining

[AMP-D]

I don't see how that is counter to what AMP-D has stated. The bearings might have been the root cause of the issue, but not the source of the actual whine noise. Like he said, bad bearings will lead to poor mesh of the gearing. The gearing makes the noise because the bearing allows it to. In our products, the gearing can move around a little bit and the actual mesh pattern can sometimes change, but because differential gearing turns so slow (just a few RPM), it isn't sensitive to this sort of noise. We can get away way with tooth profiles that would scare a transmission guy, which makes the hobbing faster. But transmission gearing spin at much higher speeds and are very sensitive to tooth profile and mesh condition, just like a rear axle ring & pinion is very sensitive to the same things. If it is set up wrong - or moves under load due to bearing issues - it will whine. But the bearing itself isn't generating the noise.

100% correct.

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[AMP-D]

This all didn't start with the 2015 Mustang, this began back in 2010 and there are people with 100,000+ miles on their MT-82s. Zero whine until bearing failure.

Show us an example of a bearing failure. I would like to see a cut away of said bearing and how it failed. There are cars with less than 5K on them howling and still go a long ways after the whine develops. Bearings, once to the point of failure destroy themselves pretty quickly. It doesn't take 10s of thousands of miles to do so.

 

[ridenfish39]

My 12 had a slight whine in 1-4 from new til I traded it at 44 k miles, and so does my 15. My 12 shifted and felt really good, except for the famous left turn 1-2 nibble. My 15 is like butter, even better and more solid then the 12 and it doesn't have the 1-2 nibble. The only mod I did to both was the Steeda shifter bracket. Doesn't bother me now, but it would if it was as loud as some of the videos I've seen.

 

[BBB]

It is only happening in 1-4 and i agree gears feel like butter. It only starts to whine when it gets really hot. Like this week we are in 100+ degree weather and it'll whine like a mofo

 

[Grimace427]

Show us an example of a bearing failure. I would like to see a cut away of said bearing and how it failed. There are cars with less than 5K on them howling and still go a long ways after the whine develops. Bearings, once to the point of failure destroy themselves pretty quickly. It doesn't take 10s of thousands of miles to do so.

Are you expecting me to tear apart a trans just to further prove my point? I'm giving you the reality of MT-82 owners from the last 5 years, links posted.

My first trans began whining at 1,200 miles and ran for 10,000 miles before I decided to have it fixed/replaced under warranty. Current trans still silent at 35,xxx miles.

 

[AMP-D]

It is only happening in 1-4 and i agree gears feel like butter. It only starts to whine when it gets really hot. Like this week we are in 100+ degree weather and it'll whine like a mofo

Fluid is thinning out which reduces the ability to fill in the low spots on the tooth of the gear and allowing it to whine. There's a reason differentials don't use ATF in them and require a heavier fluid to run quiet and hold up.

 

[AMP-D]

Are you expecting me to tear apart a trans just to further prove my point? I'm giving you the reality of MT-82 owners from the last 5 years, links posted.

My first trans began whining at 1,200 miles and ran for 10,000 miles before I decided to have it fixed/replaced under warranty. Current trans still silent at 35,xxx miles.

I'd just like to see some pictures of these bearings cut open that you are claiming were the reason the whine began. I am giving you advice based on 20 years of manual transmission experience. The bearings found on the MT82 are very similar to the same bearings found in Toyota manual transmissions as well as many others that use roller bearings instead of tapered bearings.

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