transmission oil change

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Mar 5, 2014 | 06:27 PM

#11

WetSider

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Joined: Mar 2012

Posts: 343

Likes: 1

From: Western WA

Also like to run gear oil in the tranny. I got a "free" 1st service with my bike and so I experimented and had them do Syn3 in all 3 holes. No noticeable difference in the tranny from what came in the bike at delivery, but it was terrible in the primary - switched that out pronto, and have been very pleased with the Redline product I swapped in there. I only noticed a 'minor' reduction in shift thunk when I swapped the Syn3 for Royal Purple Syn gear oil. I keep hearing that the Redline with Shockproof can make a noticeable difference in the shift 'thunk' but have yet to try it. On my Evo, I always used Mobil1 gear oil and it was fine.

Mar 5, 2014 | 06:39 PM

#12

Drat

Road Warrior

Joined: May 2007

Posts: 1,951

Likes: 33

From: Upstate NY

I have always used synthetic gear oil in my tranny. Hey it is full of "gears" so gear oil just seemed to be the right thing to use.

Mar 5, 2014 | 06:41 PM

#13

SafetyMan

Ultimate HDF Member

Joined: Jun 2007

Posts: 7,970

Likes: 85

From: San Antone

I use and recommend Amsoil Severe Gear 75w110.

Seems to shift smoother, in my experience and YMMV.

Mar 5, 2014 | 06:43 PM

#14

Tx_Rider

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Joined: Mar 2009

Posts: 413

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From: Killeen, Tx

I run Royal Purple 75-90 or 75-140 with no metal on the plug. I also use Royal Purple in my Volvo penta outdrive on the boat. I saw a noticeable different when I switched oil on the boat, there is a small portion that is out of the water when running and it gets hot and cooks the water. With the RP it cooled it down significantly.

I know these are apples and oranges but same oil.

Mar 5, 2014 | 06:59 PM

#15

lt1-xjs

Road Master

Joined: Nov 2012

Posts: 1,027

Likes: 69

From: Centerville, ohio

Quote:

Originally Posted by harfooz

There is some difference in how the viscosity is rated for gear oils compared to engine oil. I wish I could remember where I found it -- maybe the BobIsTheOilGuy forums?? -- but the higher gear oil viscosity numbers were pretty much the same equivalent as the engine oil viscosities we use.

Anybody got a reference about that?

'fooz

Per Bel-Ray's website their Gear Saver 80 wt is equal to 10w40 motor oil
" 85 wt equal to 20w50 "

Last edited by lt1-xjs; Mar 5, 2014 at 07:01 PM.

Mar 5, 2014 | 07:23 PM

#16

RatPwrd72

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Joined: Dec 2012

Posts: 372

Likes: 26

From: Oklahoma

I switched mine to Bel-Ray Hypoid 85/140 at the first service and noticed immediately that the 1st gear whine is quiter and the trans shifts smoother.

Mar 5, 2014 | 07:55 PM

#17

dochawken

Thread Starter

Road Master

Joined: May 2009

Posts: 992

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From: TN

Quote:

Originally Posted by Drat

I have always used synthetic gear oil in my tranny. Hey it is full of "gears" so gear oil just seemed to be the right thing to use.

jaysus that made me laugh...rock on!!

Mar 5, 2014 | 08:14 PM

#18

TUCCI

Extreme HDF Member

Joined: Jun 2011

Posts: 10,216

Likes: 224

From: Glendale AZ

I've been using either M1 or Lucas synth 75-90 or 75-140. It stays real clean in there even after 6k miles. I'm getting ready to do a change and found m1 75-90 at Amazon for 11.79 and bought enough for both bikes. Been using gear oil in the trans for most of it's life.