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Buell Forum » THUMPer Forum » Blasting Away - The Thumper Quick board » Archive through June 15, 2010 » Switched from 15w50 synthetic in the trans to mobile synth gear oil and HATE IT « Previous Next »

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The4ork
Posted on Monday, May 17, 2010 - 07:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

since switching from (i think) mobil 15w50 synthtic (whatever it was you guys reccomended) to a mobile 1 synthetic gear oil im not liking it at all.

it shifts a little more rough, and it stinks like gear oil after riding it and shutting it off after long trips, or hard riding. very annoying smell

also, i did the same on my tuber, and as soon as i switched to real gear oil i got a primary leak

also followed the instructions for the primary adjustment as well after and still no better
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Titusand
Posted on Monday, May 17, 2010 - 08:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It seems to me you are not supposed to use gear oil in this application. I believe it is too viscous.
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Gearheaderiko
Posted on Monday, May 17, 2010 - 09:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What weight are you using? My guess (as previously noted above) that its too heavy. Some synthetic gear oil is very good, others are way too heavy and can even damage the clutch plates (and stator wiring-depending on what it is).
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Buellistic
Posted on Monday, May 17, 2010 - 09:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You'll have run just about every kind of lubricant in your transmissions, "BUT" no one has said any thing about automatic transmission fluid ???
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Ezblast
Posted on Tuesday, May 18, 2010 - 01:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Please stay on topic -

All gear oils have not been recommended because they carry sulfate buffers in high quantities that will slowly destroy your wiring - aka stator.
EZ
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Titusand
Posted on Tuesday, May 18, 2010 - 01:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Even though it runs a couple of bucks more per quart just for the name, just sticking to the official Harley brand does eliminate a lot of time thinking about what in the world to buy, and worry about whether one is using the correct product. The engineers have already tested it and done the thinking for you about which oil to buy.
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The4ork
Posted on Tuesday, May 18, 2010 - 02:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

its a 75w90 i think... wich is a lot thicker than the 15w50 or 20w50 i had in there before...
CRAP, i have it in 3 blasts, AND my S1...

ive noticed on my blast the clutch doesnt seem to engage right away, ill pull out from a stop and it will go, then all the sudden the clutch will "fully engage" and jerk the bike a little.
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Titusand
Posted on Tuesday, May 18, 2010 - 03:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That jerking is probably the clutch finally working its way through the heavy goo you put into the tranny. The viscosity of the oil of course affects the action of that type of clutch. A too thin oil will cause the clutch to engage too quickly and give a similar result. I'm going to sound like I'm wagging my finger at you, but really all aspects of these things are balanced out very carefully during design and second guessing a team of engineers who designed and testing the thing, and who put a 2 year unlimited milage warranty on a transmission, is probably not going to get you far.
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Indybuell
Posted on Tuesday, May 18, 2010 - 04:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Get that gunk out of there, asap!
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Monzaracer
Posted on Wednesday, May 19, 2010 - 01:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Which idiot told you to use mobil 1 GEAR oil in the tranny.
Harley has a specific trans oil but honestly the best HD techs around tell you to use 20w50 HD synthetic motor oil.
As for the clunk when taking off every Blast I have seen or ridden has done that, seems to be a trait of them.
I would get a coupe of quarts or synthetic Vtwin Mobil 1 or synthetic HD 20w50 , change it ride it about 100 miles and change it again,,,, and hope to God the bearings arent effed up.
Oh and the guy who told you to use GEAR OIL,,, find a 2x4, whittle down a good handle and go Hacksaw Jim Dugan on him!!
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Titusand
Posted on Wednesday, May 19, 2010 - 08:48 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

To clear that 75w90 oil up, re-fill, and drain. If you put 1/16 of a mile on it that would be plenty to blend the two oils. Riding 100 miles would be like blending a cocktail for two or three hours....
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Monzaracer
Posted on Wednesday, May 19, 2010 - 09:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

OK my theory was he would warm it up, then drain it and allow it to drain for a period of time THEN fill it and ride enough to get the good stuff everywhere to wash it out good, then redrain and tada its done. And this was similar advice I got from the HD/Buell tech who told me how to change mine, and I ask about what was in it, as it had some shifting issues with stock stuff in it, after doing it this way its shifting issue went away. If he has had thick stuff in it its EVERYWHERE and will take a small period of time to mix, get hot and all that so it will come out, so riding 1/16th of a mile is 325 feet. GET REAL THAT WONT MIX ANYTHING UP ENOUGH TO WASH IT OUT.
I stand by what I stated.
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