Using Mobil1 V-Twin in Gearbox
May our Moderator Rest in Peace
Joined: Sep 2006
Posts: 11,386
Likes: 35
From: Rochester, NY
If you have a problem getting Red Line or Amsoil where you are you can always use Mobile 1 75W90 or 90W140 full synthetic in the tranny.
I do and it works just fine in my bike.
I do and it works just fine in my bike.
Seasoned HDF Member
Joined: May 2008
Posts: 21,175
Likes: 12,747
From: South Carolina
I have used whatever el cheapo gear oil I had on hand at the time for 115,000 miles on my `89 FLST, when I tore the gearbox down the gears and bearings looked fine.
No synthetics, no high priced gear lubes. No problems.
No synthetics, no high priced gear lubes. No problems.
Road Warrior
Joined: Mar 2007
Posts: 1,396
Likes: 146
From:
You can definitely use it (Mobil 1) in all three holes, but there are other better alternatives. For your transmission, you can't go wrong with "Redline V-Twin with Shockproof." I had a problem getting my bike into neutral once it reached operating temperature. Several people in this forum suggested that I try Redline trans fluid and I'm glad I did. Finding neutral is way easier now. Redline is also the oil that Baker recommends for their after market transmissions.
Seasoned HDF Member
Joined: Oct 2006
Posts: 5,977
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From: Nevada
Not knocking the Red Line, but Baker now recommends Spectro. Some of the confusion on oils is that the old 5 speeds required a GL-1 rated lube while the new 6 speed requires a GL-5. My manual for my '07 Touring bikes says to only use Formula+. No mention of Syn3. That's the first year of the six speed unless you count Dynas. I only use gear oil in my trannys cause tranny aren't engines so they need additives for gears and bearings used in trannys. Spectro stinks like a good gear oil should when you drain it. The old Harley Semi Synth Gear Lube, which I liked, also stinks when you drain it. Smells like what comes out of my truck tranny and differentials. Motor oil and Formula+ smell like motor oil. I won't use it in my trannys if it doesn't stink!
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Last edited by Faast Ed; Jan 12, 2010 at 07:02 PM.
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Mar 30, 2008 10:59 PM
