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#62908 - 03/30/05 3:22 am norton gearbox oil  
Joined: Mar 2005
Posts: 1
captain Offline
One time posting
captain  Offline
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Joined: Mar 2005
Posts: 1
what type of lube do you all use in the gearbox of your commandos??? Some one said Not to use GL5 gear lube ?? I'd like to know what you folks out there are using successfully. captain

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#62909 - 03/30/05 12:05 pm Re: norton gearbox oil  
Joined: May 2004
Posts: 557
jangg Offline
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jangg  Offline
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Joined: May 2004
Posts: 557
Norway, just south of Oslo
captain.

The Workshop manual say EP90 (gear oil) - I use that in mine bigt

regards
jangg


'73 Commando Basket - new aluminium cyl
'93 Ducati 900 SS

"Better lit a light than cursing the darkness"
(Confucius)
#62910 - 03/30/05 7:20 pm Re: norton gearbox oil  
Joined: Oct 2004
Posts: 243
Dr_Hiller Offline
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Dr_Hiller  Offline
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Joined: Oct 2004
Posts: 243
Seattle, WA USA
Capt.

I've used RedLine's 75W90 NS gear lube on many applications - with great success.

The *NS* lube is a GL-5-type oil *without* the limited-slip differential additives. They say that this helps synchros come to equal speeds more quickly, for faster shifting.

Its not free, but one uses so little that the cost shouldn't be prohibitive.

I've read many testimonials from people who use ATF in their AMC gearboxes, but I'm not ready to take that leap.

Take care,
David


Ride safe,
David
--------------------------

1971 Norton Commando (parts bucket mongrel)
#62911 - 03/30/05 7:50 pm Re: norton gearbox oil  
Joined: Aug 2001
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hh Offline
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hh  Offline
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Posts: 1,839
British Columbia
Redline 75W90NS (non-slip) is designed for limited slip differentials and synchro gearboxes so it doesn't have the friction modifiers that make it extremely slippery since they would interfere with their operation.

The concern over GL-5 oils is the sulphur additives that corrode the bronze bushes. GL-4 is more appropriate.


"Beer is proof that God loves us and wants us to be happy" - Benjamin Franklin
#62912 - 03/31/05 1:37 am Re: norton gearbox oil  
Joined: Oct 2004
Posts: 243
Dr_Hiller Offline
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Dr_Hiller  Offline
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Posts: 243
Seattle, WA USA
HH:

Ohhh... that's the reason for sticking with the GL-4 spec. Now I know. Thanks.

You'd think they'd tell us *why* the newer lubes were potentially harmful.

Hmmm, I guess I'll have to keep an eye on my newly rebuilt gearbox... or drain and refill it to be on the safe side.

Live and learn,
D.


Ride safe,
David
--------------------------

1971 Norton Commando (parts bucket mongrel)
#62913 - 04/03/05 11:09 pm Re: norton gearbox oil  
Joined: Mar 2005
Posts: 11
Sky Offline
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Sky  Offline
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Joined: Mar 2005
Posts: 11
Pittrburgh
Have used synthetic 80-140wt. oil with plesant results, shifts like rice, usually Penzoil but brand not important, last did box in 85?


"It is my firm conviction that the Commando represents the very apex of motorcycle engineering"

Moderated by  Dave Comeau 


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