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Old Sep 16, 2015 | 06:11 AM
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Default Transmission Oil
I see some are using the Amsoil severe gear 75w-140 in their transmission. Isn't 140 a bit high? Wouldn't 75w-90 be a better viscocity?
 
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Old Sep 16, 2015 | 06:36 AM
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I've been using Redline V-Twin transmission fluid which states the following and maybe Amsoil is similar.
From Redline:
The viscosity characteristics allow the lubricant to resist throw off and provide a film thickness similar to a 75W250 grade, while providing the same low fluid friction as an SAE 75W90.
 
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Old Sep 16, 2015 | 07:00 AM
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Yes because the 75w is the same? When hot I would think anything over 90 would be too thick.
 
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Old Sep 16, 2015 | 07:08 AM
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Oh good lord. Really?

Knock yourselves out, there's an entire forum dedicated to oil: https://www.hdforums.com/forum/oil-a...ted-topics-30/
 
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Old Sep 16, 2015 | 08:05 AM
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Originally Posted by Keithhu
Oh good lord. Really?

Knock yourselves out, there's an entire forum dedicated to oil: https://www.hdforums.com/forum/oil-a...ted-topics-30/
Thanks for the short cut! It looks like the 140 is too thick!
 
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Old Sep 16, 2015 | 09:55 AM
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The 75-110 seems to work well.
 
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Old Sep 16, 2015 | 10:58 AM
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Originally Posted by qtrracer
The 75-110 seems to work well.
Yep. That's what I use too.

David
 
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Old Sep 16, 2015 | 12:42 PM
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Redline heavy shockproof gear oil great stuff .
 
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Old Sep 16, 2015 | 01:35 PM
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75/140 Severe Gear here for many 10s of thousands of miles. It has performed excellent, even in our colder climate.
 
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Old Sep 16, 2015 | 03:25 PM
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I have ran severe gear 75/140 for a total of 140,000 miles between my last two bikes. Had no transmission issues with either bike...................Ran the stuff year round with great results.
 
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