Same oil in Tranny, Primary and Engine?

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Jan 29, 2013 | 07:51 PM

#21

jmn1960

Road Master

Joined: Aug 2012

Posts: 892

Likes: 6

From: rio rancho n.m.

2005 ultra,,,40k on the clock
mobile syth 20/50--eng
mobile syth 75/140 trans
straight ATF prim,,
never had a problem

Jan 29, 2013 | 08:19 PM

#22

WI Bob

Road Master

Joined: May 2008

Posts: 1,065

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From: Madison, WI

Quote:

Originally Posted by the warden

Ditto. While some may think that running a good synthetic in the primary is a waste, I think it contributes to longer life of the chain and chain tensioner pad. If you are mechanically inclined this is no big deal to replace, but if you are not, the extra cost for synthetic will soon offset the labor cost to replace the tensioner pad more frequently.

It will also contribute to a slipping clutch once torque gets around 110.

Last edited by WI Bob; Jan 29, 2013 at 09:21 PM.

Jan 29, 2013 | 08:33 PM

#23

NECaveman

Tourer

Joined: Jul 2009

Posts: 490

Likes: 1

From: Omaha, NE

Engine: Mobile 1 V-Twin 20W50; Primary and Transmission: HD Formula+. I ran Syn3 in all three holes on my 2009 SG since the first oil change up to last fall with 14K miles. Changed oil brands attempting to reduce engine and transmission noise. No real noticeable change with the engine, but the transmission is definitely less noisy and shifts easier with HD Formula+.

Last edited by NECaveman; Jan 29, 2013 at 08:40 PM. Reason: Grammar and additonal info.

Jan 30, 2013 | 04:03 PM

#24

corliss@bakerdrivetrain.com

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Joined: Mar 2012

Posts: 23,850

Likes: 1,861

From: Michigan

Do not run motor oil in your trans. Reason; motor oil has very little zinc or phosphorous content these are the 2 components that you need for gear protection. Motor oils also have detergents to clean out the burnt deposits. Nothing burns in the transmission it does not need detergents.

Jan 30, 2013 | 04:21 PM

#25

Sagido

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Joined: Jul 2012

Posts: 486

Likes: 1

From: Coal Township, Pa

I used Redline in my last bikes transmission, loved it, noticably quieter. Will be switching over when I get my 1k mile service done. I have no issues with SYN3 for the motor, and have yet to make up my mind on the primary. Used Redline in the last primary with no issues. But leaning towards Harley Formula +

Question: Why does Harley Davidson reccomend diffrent change intervals than most dealers provide? Motor: 1K, 5K, 10k, 15k, 20K etc..... Primary: 1k, 10K, 20k, 30K etc..... Transmision: 1K, 20K, 40K, 60K etc.....

I have never drained my transmission without thinking it was a waste since the fluid look like I had just poured it in the fill hole.

Curious to see responses???

Jan 30, 2013 | 04:35 PM

#26

cezariomaia

Cruiser

Joined: Jan 2008

Posts: 101

Likes: 1

From: Brazil

Motul 7100 20W50 in motor.
Motul Motyl Gear 75W90 in trans.
Motul Transoil 10W30 in primary

Jan 30, 2013 | 04:57 PM

#27

Mr HOG

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Joined: Apr 2010

Posts: 824

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From: O'fallon IL

Quote:

Originally Posted by kramercarpet

He said I can run the same synthetic 20w-50 in all three.. Ups or Downs?

The only problem i have with this statement is what to use in the transmission. IMO, the tranny needs gear oil and Syn 20W50 is not gear oil. As many others, I run Redline Heavy Shockproof oil in my transmissions.

Jan 30, 2013 | 05:23 PM

#28

5TIME

Cruiser

Joined: Aug 2012

Posts: 228

Likes: 1

From: Katy, TX

For all Redline users: I am planning to move to Mobil 1 20w-50 in my engine, Redline primary, and Redline V-Twin Transmission fluid with shockproof. It looks like they indicate that it is the same thing as the old shockproof. Is it? I can't find just "shockproof" gear oil. I was going to buy the Redline products at Cycle Gear. Any better suggestions?