Trans whine gone
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Cruiser
Joined: Mar 2008
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Trans whine gone
Yesterday i drained the Harley synthetic oil from my bike transmisson and replaced it with Amsoil 75-140. What a difference No more clunk when shifting or whining in 4th or 5th. The trans is so quiet. Anyway had to try it after all the posts i read.
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Cruiser
Joined: Mar 2008
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RE: Trans whine gone
I was impressed, i read in the do it yourself section. One guy was an engineer i think and he made some very good points about gear lash. I do believe 100% that oil and gear lash are critical. The synthetic 20w50 is a great oil but to thin to control the lash in this trans. The upshift is so smooth now, the Amsoil 75w 140 is very expensive $12 a quart.  \\;
Cruiser
Joined: Nov 2006
Posts: 195
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From: Boston, MA
RE: Trans whine gone
Did the same the other day. Put the Bel-Ray in my bike. Night and day difference! I'll never use that stuff again in my tranny. My tranny was the noisiest it ever was with that H-D stuff in it...
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Cruiser
Joined: Mar 2008
Posts: 114
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RE: Trans whine gone
I agree Point man the Harley syn is not the right oil for me. I think eventually the load on the bearings is not good \\;. The gear lash in a car rear end is very sensitive to oil viscosity. The other day i was in the parts store and saw a Lucas display and the difference in the oils in the display was impressive. I would run a gear lube before putting 20w50 in the trans.
Cruiser
Joined: Mar 2008
Posts: 168
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From: The Frozen North - Hastings Michigan
RE: Trans whine gone
 \\;
 \\;I put the Amsoil gear oil in the six speed Scremin Eagle trans \\;in my Road King and found the same \\;results. That Amsoil is GOOD stuff. I use it in the engine too.
 \\;For the benifits you get from it, it is worth the little \\;extra you pay for it.
 \\;
 \\;G wizz
 \\;I put the Amsoil gear oil in the six speed Scremin Eagle trans \\;in my Road King and found the same \\;results. That Amsoil is GOOD stuff. I use it in the engine too.
 \\;For the benifits you get from it, it is worth the little \\;extra you pay for it.
 \\;
 \\;G wizz
Cruiser
Joined: May 2008
Posts: 236
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From: The A T L
RE: Trans whine gone
I changed to the SPECTRO 6 spd tranny oil. Anyone else? I would like to try the amsoil as the SPECTRO \\; doesn't seem to be much diff. It's red fluid and will it mix if I swith to amsoil? Anyone??
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Ultimate HDF Member
Joined: Aug 2007
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From: Hico, TX (once home to Billy the Kid)
RE: Trans whine gone
Simce Im not an Oil expert I have a question:
Whats the difference between 70/90 and 75/140?
 \\;
Whats the difference between 70/90 and 75/140?
 \\;
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Grand HDF Member
Joined: Mar 2007
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From: Deep in the heart of New Jersey
RE: Trans whine gone
In the oil section theres a chart listd somewhere where it says that 75/90 wt oil is the same weight as 50 wt oil. And the 80/140 is the same s 60 wt oil. they use a different method of gradeing the motor and gear oils, but it seems in the end they weigh the same. Even amsoil's 20/50 wt motor oil carries a gl1 rating and can be used in your trans. so the guys who say "I would never use a motor oil in my trans cause its too light", crack me up.,,