Will Synthetic 80W-90 Gear Lube work on my Harley
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Stage III
Joined: Jun 2014
Posts: 3
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From: Canada
Will Synthetic 80W-90 Gear Lube work on my Harley
I have a 2007 Harley Street Glide and am need to change my transmission fluid. Has anyone used Synthetic 80W-90 Gear Lube for the Tranny?
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
you can use that- but any reason why you wouldn't use the same fluid again, or the HD Primary+ ?
I know there are all kinds of magic fluids- but I run HD spec'd oil and lubes in my '09, '88 and '53 models. ( and the '95, '63 and '53 models I used to own.)
it just works.
Welcome to the Forums, post your locality- plenty of Canucks here.
Mike
I know there are all kinds of magic fluids- but I run HD spec'd oil and lubes in my '09, '88 and '53 models. ( and the '95, '63 and '53 models I used to own.)
it just works.
Welcome to the Forums, post your locality- plenty of Canucks here.
Mike
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Stage III
Joined: Jun 2014
Posts: 3
Likes: 0
From: Canada
I use Amsoil in Engine Oil and happy with it
I have used the Amsoil 20w-50 advanced synthetic Motor oil for the engine oil and I have noticed my engine is running cooler and a bit quiter. Happy so far with Amsoil so thinking their gear oil is good but can't find anyone who has used it.
Road Master
Joined: Dec 2008
Posts: 872
Likes: 20
From: Niagara Falls Canada
tranny has gears
i use castrol 75w90 syn gear oil used in car differentials,, shifts better quiet and when drain it after use it comes out much cleaner than regular motor oil telling me it does a much better job lubricating since gears arent wearing down like the black dirty oil i see when I had regular harley syn in the bike.
Road Warrior
Joined: May 2007
Posts: 1,951
Likes: 33
From: Upstate NY
I am using Mobil 1 75-90 synthetic gear oil. No problems with the transmission with it. I have used it in two Harleys to date and no issues at all. Hey its full of gears so it just seems right to use gear oil.
Supporter
Joined: Jan 2007
Posts: 15,787
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From: along the shore of Mishigami
+1 on the M1 syn. gear lube. I almost sure the gear lube has additives to deal with the oil shearing by the gears, or I believed a whole bunch of crap about. I know it works well and it's a little quieter.
Tourer
Joined: Jun 2007
Posts: 425
Likes: 1
From: West Palm Beach
I used Amsoil Severe Gear 75W 90 in my 2007 Road King Custom without any issues. I had 27,000 miles within 7 years on the bike before I lost the bike due to an accident.
Today I had a 1000 mile service done by the dealer on my new Street Glide. It was recommended by the dealer to put in Spectro Red 75W 140. Like Amsoil Severe Gear, this is also a full synthetic oil, but unlike Amsoil Severe Gear, Spectro Red has it written on the label that it is designed for motorcycle transmissions. The dealer installed Amsoil 20W50 in the engine, Spectro Red 75W 140 in the transmission and Syn3 in the primary.
I think the 75W 140 will be better for me as I live in South Florida with year round warm weather. After researching Spectro Red, I agree with the dealer opinion that Spectro Red was designed for motorcycle transmissions opposed to other vehicle transmissions.
Today I had a 1000 mile service done by the dealer on my new Street Glide. It was recommended by the dealer to put in Spectro Red 75W 140. Like Amsoil Severe Gear, this is also a full synthetic oil, but unlike Amsoil Severe Gear, Spectro Red has it written on the label that it is designed for motorcycle transmissions. The dealer installed Amsoil 20W50 in the engine, Spectro Red 75W 140 in the transmission and Syn3 in the primary.
I think the 75W 140 will be better for me as I live in South Florida with year round warm weather. After researching Spectro Red, I agree with the dealer opinion that Spectro Red was designed for motorcycle transmissions opposed to other vehicle transmissions.
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Seasoned HDF Member
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From: Honah Lee
Know this is a silly oil thread..but..HA. I'm old school and the GL5 if that is what it is has a special additive for the high load shear action of hypoid gears in a differential. (The worm is below the center line of the ring gear) This additive is highly corrosive to a bronze bearing. Late model Harleys have some type of bronze plating on the shift forks. They also have a double set of very small needle bearings in the inner input shaft of the main gear that needs a lighter fluid to flush any steel chips. I would stick to Harley's oil recommendation. Probably their Formula + . It's the same price and truly silly to engineer the lube in a $3K part.
Last edited by Jackie Paper; Jun 21, 2014 at 08:17 PM.
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Seasoned HDF Member
Joined: Jan 2007
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From: anacoco, la
Know this is a silly oil thread..but..HA. I'm old school and the GL5 if that is what it is has a special additive for the high load shear action of hypoid gears in a differential. (The worm is below the center line of the ring gear) This additive is highly corrosive to a bronze bearing. Late model Harleys have some type of bronze plating on the shift forks. They also have a double set of very small needle bearings in the inner input shaft of the main gear that needs a lighter fluid to flush any steel chips. I would stick to Harley's oil recommendation. Probably their Formula + . It's the same price and truly silly to engineer the lube in a $3K part.