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What is the best trans and primary oil?

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  #1  
Old 03-31-2009, 08:12 PM
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Default What is the best trans and primary oil?
Do you guys run the 20W-50 in the transand primary? I have an 09 Street Glide. I was thinking of running 75W-90 synthetic in the trans. Would this be a good idea or not?

thanks
 
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  #2  
Old 03-31-2009, 08:14 PM
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Which guys are you talking to? There are thousands on this forum, with thousands of different opinions, to the point that there is an oil thread.......

https://www.hdforums.com/forum/oil-related-47/
 
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Old 03-31-2009, 08:18 PM
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Some say Redline in the trans is best. I run 20w50 synthetic
 
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Old 03-31-2009, 08:22 PM
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I run Mobil 1 synthetic trans fluid 75-90 in both the trans and primary.
 
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Old 03-31-2009, 08:35 PM
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I use Amsoil MCV 20W50 in primary and Severe Gear 75W110 in trans.
 
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Old 03-31-2009, 09:41 PM
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royal purple 75/140 in the trans
formula + in the primary
 
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Old 03-31-2009, 09:48 PM
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There is only one Redline Shockproof. I thought I was wasting my money and switched to MotorCo synthetic. I'm going back to Redline. There is a world of difference.
 
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Old 03-31-2009, 10:14 PM
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Originally Posted by FX4
There is only one Redline Shockproof. I thought I was wasting my money and switched to MotorCo synthetic. I'm going back to Redline. There is a world of difference.
+1 on the redline shockproof..they also make a specific primary oil
 
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Old 03-31-2009, 10:17 PM
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Originally Posted by FX4
There is only one Redline Shockproof.
Actually there are at least 2....Heavy and Lightweight.
 
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Old 04-01-2009, 01:11 AM
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Mobil 1 Syn 75-140W gear oil - tranny
Mobil 1 Syn 4T Racing 10-40W - primary

Both can be purchased at Autozone
 
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