Super noisy trans after new gears.. video!

[MikeEyre74]

So I just replaced the second and third sliding gear in the transmission, and fixed a sheared off keyway and roll Pin in the creeper. I just got it all back together enough just enough to head out into the driveway and see how things worked. It shifts fine and goes forward and backward and the creeper works just like it’s supposed to. But, when I put it in third gear high range, it’s noisy as hell at full blast. In second gear it’s also noticeable, but probably nothing I would have paid much attention to… But third gear is crazy loud. Here’s a video that I took. In the video, I start out in third gear and you can hear the noise plain as day, I stop a few seconds in and shift to second and you can hear how much quieter it is, but it’s still there.

https://youtu.be/w3mv46MEUqA

Did I do something obviously wrong or is this something that happens when you put in brand new gears with all the gears and it takes a little time to work its way together? Or are they just like that? I have really not had a chance to try this tractor when it was working properly, as I bought it with a blown up transmission.

[tst]

gears should be changed in pairs, the lower and upper that mesh together or you end up with the issue you have now

[BigBill]

Did you change the bearings besides both the mating gears? Since the tranny is used as a hydraulic oil tank the thinner oil does magnify noise more. Not a good sound to hear.

[MikeEyre74]

If it’s just noisy and nothing is seriously wrong, then I will deal with the noise. Eventually New Gears and old gears will just meld together I figure… I’m not concerned with the noise so much, since I wear ear protection when mowing. I just don’t want to blow something up is all?

I didn’t change any bearings, everything was cleaned and inspected and seemed to be good. All of the broken pieces were accounted for. There weren’t that many... mostly big pieces.

[outdoors4evr]

Like tst mentioned, that is gear mesh. Old gears and new gears aren't the same shape. The old gears have wear and the new gears don't (yet).

[mozer71]

I think when the old gear was losing its teeth, it was binding into the mating gear. Something got bent or reformed during that. I watched/ listened to your video and it sounds that way. It is also fair to say that many sound like this without the rhythm. So as said earlier, they should mesh in.

[Larry B]

Try jacking the rear wheels off the ground and see if you have the same noise with no load on the gears. Doesn't sound like a good noise.

[BigBill]

If the tranny didn’t have hydraulic oil in it I’d suggest putting a can of STP in the gear oil.

Sounds like you get to do it again.

[MikeEyre74]

Well, I did. I split the tractor again this afternoon, I found out where that snap ring went and then reassembled everything. Upon taking it out for a test drive, the transmission no longer makes any noise and is quiet as a mouse. ThaNk goodness!