Redline Primary Case Oil ?
Banned
Joined: Sep 2013
Posts: 1,127
Likes: 226
From: middle Tennessee
RL MT90 manual transmission gear oil might be a better selection that RL 75W90 differential oil for XL clutch/manual non SYN trans application.
The lubricity factor is less than the super slippery RL 75W90 differential lubricant.
RL states MT90 is recommended for GL-1, GL-3 & GL-4 applications.
Warren Oil blends a GL-1 spec oil available at Tractor Supply for use in vintage Ford 8N tractors for use in both manual non SYN trans
and hydraulic system to drive the three point implement lift on the rear of the tractor.
The lubricity factor is less than the super slippery RL 75W90 differential lubricant.
RL states MT90 is recommended for GL-1, GL-3 & GL-4 applications.
Warren Oil blends a GL-1 spec oil available at Tractor Supply for use in vintage Ford 8N tractors for use in both manual non SYN trans
and hydraulic system to drive the three point implement lift on the rear of the tractor.
For the last time....
Here is Red Lines official response -
Thank you for contacting Red Line Oil, in the shared Sportster primary/transmission the 75W90 is recommended, a product that has been used extensively and performs well.
The 75W90 is the product we have have used for a number of years with very good results in Sportster/Buell transmissions, matching the viscosity and type fluid called for.
The 80W Motorcycle Gear Oil is a lower viscosity than called for, the ShockProof gear oils can due to their unique characteristics could cause sticking of the Harley clutches.
The 75W90 would be preferred and recommended over 80W Motorcycle Gear Oil in these applications.
There can be issues with some GL-5 gear oils in certain applications. Some can be corrosive to brass, bronze or copper, not an issue with our GL-5 gear oils, they don’t cause corrosion, pitting or metal removal. In a synchro equipped transmission the friction modifiers contained in many gear oils can make them too slippery, though not the case in a motorcycle transmission with dog rings.
So if you want the right viscosity and dont want to worry about it damaging anything, go with Redline http://www.redlineoil.com/product.aspx?pid=133&pcid=4
Dave
Last edited by hexnut; Mar 27, 2017 at 06:21 AM.
Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
Verified that RL sold to Spectrum, Memphis, TN in 2013
Then, Phillips 66 in Houston, TX bought Spectrum , summer of 2014
reference BITOG posts, 3339065 & 3702077 by Halverson, automotive technical writer, .....believe this source to be correct
Then, Phillips 66 in Houston, TX bought Spectrum , summer of 2014
reference BITOG posts, 3339065 & 3702077 by Halverson, automotive technical writer, .....believe this source to be correct
Banned
Joined: Sep 2013
Posts: 1,127
Likes: 226
From: middle Tennessee
Dang, I told you that in post # 12. LOL
Last edited by hexnut; Mar 27, 2017 at 06:03 PM.
Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
Called RL today and spoke with applications rep.
RL plans on placing an XL sticker on 75W90 differential gear oil.
RL has dual stickers on MTL 75W80 manual trans gear oil & primary case oil for three case H-D touring, dynamic, softails
The lubrication industry appears to be going inn a different direction than RL with the all in one oil for separated engine and trans cases with 20W50 motorcycle oil.
Looked up the viscosity @40C =104F of several 20W50 motorcycle oils,
which is in the range for summer riding with separate chambers for trans & primary.
AMZOIL synthetic: 133 cTs
R L synthetic: 141 cTs
Valvoline conventional: 169 cTs
Valvoline synthetic: 162 cTs
Mobil 1 synthetic: 172 cTs
Also, looked up some gears oil viscosity @40C
H-D formula+ : 168 cTs
RL , MTL 75W80 manual trans gear oil: 54 cTs
RL, 75W90 differential gear oil: 112 cTs
RL markets MTL 75W80 as primary, only , case lubricant
Mobil one states, "in the application where the engine lubrication is separate from the transmission, follow the manufactures
recommendation for the type of fluid to be used in the transmission.
Based on the viscosity of RL , MTL 75W80 primary oil, to answer the OP question, this lubricate should NOT be used in the wet clutch/trans case in the XL.
RL plans on placing an XL sticker on 75W90 differential gear oil.
RL has dual stickers on MTL 75W80 manual trans gear oil & primary case oil for three case H-D touring, dynamic, softails
The lubrication industry appears to be going inn a different direction than RL with the all in one oil for separated engine and trans cases with 20W50 motorcycle oil.
Looked up the viscosity @40C =104F of several 20W50 motorcycle oils,
which is in the range for summer riding with separate chambers for trans & primary.
AMZOIL synthetic: 133 cTs
R L synthetic: 141 cTs
Valvoline conventional: 169 cTs
Valvoline synthetic: 162 cTs
Mobil 1 synthetic: 172 cTs
Also, looked up some gears oil viscosity @40C
H-D formula+ : 168 cTs
RL , MTL 75W80 manual trans gear oil: 54 cTs
RL, 75W90 differential gear oil: 112 cTs
RL markets MTL 75W80 as primary, only , case lubricant
Mobil one states, "in the application where the engine lubrication is separate from the transmission, follow the manufactures
recommendation for the type of fluid to be used in the transmission.
Based on the viscosity of RL , MTL 75W80 primary oil, to answer the OP question, this lubricate should NOT be used in the wet clutch/trans case in the XL.
Thread Starter
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Cruiser
Joined: Feb 2017
Posts: 143
Likes: 26
From: Prattville, AL USA
Called RL today and spoke with applications rep.
RL plans on placing an XL sticker on 75W90 differential gear oil.
RL has dual stickers on MTL 75W80 manual trans gear oil & primary case oil for three case H-D touring, dynamic, softails
The lubrication industry appears to be going inn a different direction than RL with the all in one oil for separated engine and trans cases with 20W50 motorcycle oil.
Looked up the viscosity @40C =104F of several 20W50 motorcycle oils,
which is in the range for summer riding with separate chambers for trans & primary.
AMZOIL synthetic: 133 cTs
R L synthetic: 141 cTs
Valvoline conventional: 169 cTs
Valvoline synthetic: 162 cTs
Mobil 1 synthetic: 172 cTs
Also, looked up some gears oil viscosity @40C
H-D formula+ : 168 cTs
RL , MTL 75W80 manual trans gear oil: 54 cTs
RL, 75W90 differential gear oil: 112 cTs
RL markets MTL 75W80 as primary, only , case lubricant
Mobil one states, "in the application where the engine lubrication is separate from the transmission, follow the manufactures
recommendation for the type of fluid to be used in the transmission.
Based on the viscosity of RL , MTL 75W80 primary oil, to answer the OP question, this lubricate should NOT be used in the wet clutch/trans case in the XL.
RL plans on placing an XL sticker on 75W90 differential gear oil.
RL has dual stickers on MTL 75W80 manual trans gear oil & primary case oil for three case H-D touring, dynamic, softails
The lubrication industry appears to be going inn a different direction than RL with the all in one oil for separated engine and trans cases with 20W50 motorcycle oil.
Looked up the viscosity @40C =104F of several 20W50 motorcycle oils,
which is in the range for summer riding with separate chambers for trans & primary.
AMZOIL synthetic: 133 cTs
R L synthetic: 141 cTs
Valvoline conventional: 169 cTs
Valvoline synthetic: 162 cTs
Mobil 1 synthetic: 172 cTs
Also, looked up some gears oil viscosity @40C
H-D formula+ : 168 cTs
RL , MTL 75W80 manual trans gear oil: 54 cTs
RL, 75W90 differential gear oil: 112 cTs
RL markets MTL 75W80 as primary, only , case lubricant
Mobil one states, "in the application where the engine lubrication is separate from the transmission, follow the manufactures
recommendation for the type of fluid to be used in the transmission.
Based on the viscosity of RL , MTL 75W80 primary oil, to answer the OP question, this lubricate should NOT be used in the wet clutch/trans case in the XL.
My original question was for the Red Line GL4 75W80 Gear oil 42904. Of which should not be used. Everything I have read here and elsewhere states to use Red Line 57904 (75W90) Synthetic Gear Oil GL5.
Road Warrior
Joined: Jul 2013
Posts: 1,649
Likes: 443
From: Indianapolis
These would be good for a Big Twin primary case lube since they have a different oil cavity for the transmission. I would not use them in a Sportster primary/transmission.
Red Line does recommend the 57904 75w-90 GL5 for Sportsters in the primary/transmission.
The MT-90 with its higher viscosity than the MTL 75w-80, (about the same as 75w-90 GL-5) can be used in the Sportster primary/transmission. There are no worries about it being too slippery for the synchronizers as the Sportster is a constant mesh dog ear transmission. MT-90 also does not have the sulfur additive (extreme pressure) found in the GL-5 lubes. The Sportster transmission with helical gears does not require the GL-5 extreme pressure additive.
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Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
Totally agree with Shanneba
Had suggested MT 90 75W90, manual transmission oil for the XL primary/trans case in post #31, since it is formulated to GL-4 with less EP , S additive.
Also meets GL-1, GL-3 EP levels.
Called Valvoline applications today in Lexington ,Kentucky
Valvoline has no recommendations for separate H-D clutch & trans cases.
Also found out that JASCO spec oil contains no MoS2, since the Japanese wet clutches are dissolved by the molybdenum anti wear additive.
Had suggested MT 90 75W90, manual transmission oil for the XL primary/trans case in post #31, since it is formulated to GL-4 with less EP , S additive.
Also meets GL-1, GL-3 EP levels.
Called Valvoline applications today in Lexington ,Kentucky
Valvoline has no recommendations for separate H-D clutch & trans cases.
Also found out that JASCO spec oil contains no MoS2, since the Japanese wet clutches are dissolved by the molybdenum anti wear additive.
Last edited by Almond farmer; Mar 28, 2017 at 12:09 PM.