Leaky Shift Shaft Seal......
While on our recent 50 day cross-country, I developed a nice little leak out of the Shift Shaft Seal on our 2014 SGS. Had close to 95k on the bike at the time. Not a bad leak and it would wait till we got back. After we got back, I went in to replace the Seal, as well as install a new Dark Horse Man-o-War Motor Sprocket that I've been wanting. (see other thread I started on that). Anyhow, taking the suggestions of multiple people, I decided to use the smallest little wood screws I could find in my shop to remove the old leaky seal. Well, it apparently got crooked while screwing it in and left a nice not so little gouge in the sidewall of the bore in the Tranny Housing that the seal fits into. See pic below......
So what I've done to this point is, on the 1st attempt I lightly sanded the extruding burr off the damaged area, crossed my fingers and put a new seal in. Fail......
Next time I took a little dab of the Permatex Gasket Dressing (Hylomar Blue) that I had, right on the gouge, crossed fingers. Fail.....
Next time, after replacing the Shifter Mechanism Shaft that the seals ID rides on with a new one, (thinking it was worn/grooved/scratched), I took the same sealant, put some extra on the gouge and also lightly all around the the rest of the bore. Fail......
This last time I gooped the sealant all around the bore pretty good, but not too much, installed the seal, let it set up for a few hours, then reassebled everything and let it sit overnight. Better, but still fail.....
This is the sealant I've been using and I'm beginning to think maybe it's not the right stuff.......
So, I'm at the point where I can go back in and try it ONE LAST TIME before I either have to buy a whole new Tranny Case, ($600!), or take mine to the local Machine Shop and have my buddy do a "Bore and Sleeve" to repair what I phucked up. However......... I'm really thinking I can fix this with a different type sealant...... I think this stuff I've been using is too soft. What do you guys suggest as far as what sealant I can/should use to seal this? I REALLY don't want to pull the Tranny out for either repair or replace. There has to be a better sealant that I can use for this that will work, right? I have this other stuff, but I'm not too sure about that either. I'd rather hear from you guys first...........
On a side note, I'm getting really fast at tearing this thing down and putting it back together again, lol!! Plus, I found a great way to remove the seal without drills and screws. Just take the Tranny Cover off and push the Shifter Mechanism back into the Tranny and it gets the Shift Shaft out of the way so you can pop the seal right out! (see the top pic again) I love YouTube!!
One more thing that comes to mind is to make sure the transmission is vented correctly. Some times they can get clogged up building pressure in the case forcing oil out. Good Luck.
Last edited by hardheaded; Sep 18, 2022 at 12:03 PM.
If you haven't with those miles I'd do belt and stator, plus primary bearings
I did sprockets and seals on main shaft too.
I am surprised rtv didn't take care of it.
Then I saw this -
Last edited by kel03; Sep 18, 2022 at 02:35 PM. Reason: corrected bearing to seal per MotoJ, thanks, not sure where the "bearing" came from lol
I would not use jb cause won't be smooth. I wouldn't make hole any bigger.
I would have used black rtv around hole. I lost track of all the chemicals tried.
I hate leaks,but what point do you just brake clean until you change belt .
I rebuilt my tranny at 90 for hell of it, when putting in new belt.
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With this in mind, I'm thinking clean the dog crap out of everything with brake cleaner and alcohol, leave the assembly lube, or tranny fluid, only on the ID of the seal and shaft, put a goodly amount of some regular high temp RTV in the bore, and instead of sinking the seal to the spec'd out depth of 0.120" - 0.140", I bury it up against the back of the bore. This will keep the seal lip still riding on the fresh surface of the new shaft. I've seen videos of guys setting the seal all the way back into the bore, and thinking it prolly won't hurt AND maybe help it to seal on a seperate surface. The sleeve is deep enough into the housing that it won't come in contact with the seal either. I'm really getting driven to fix this damn thing instead of pulling the whole tranny out for repair or replace, lol, but I'm starting to run low on options here.....
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