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General Category => General Discussion => Topic started by: Bobolink on July 20, 2015, 10:17:38 AM

Title: 8V Gearbox
Post by: Bobolink on July 20, 2015, 10:17:38 AM

Can anyone tell me about the 8V gearboxes?  I'm assuming it's a constant mesh type.  Also, are there any copper alloy metals in the gearbox?  My 2013 Norge manual specifies a GL-4 gear oil.  It's my understanding that GL-4 was intended for transmissions that contain bronze synchros or bushings.  It's also my understanding that modern GL-5 oils (those of the last 15 years) use a buffered sulfur that is not corrosive to copper alloys. 
I'm just curious as to why Moto Guzzi specs a GL-4.

Thanks

Title: Re: 8V Gearbox
Post by: canuguzzi on July 20, 2015, 10:38:42 AM

Just a guess but maybe it's a holdover spec, like other docs, no need to update it because it worked in the past?

Title: Re: 8V Gearbox
Post by: pauldaytona on July 20, 2015, 03:12:04 PM

this is the spec:
http://travel.eni.com/catalog/products/documents/001423_1_en_IT_1_106.pdf

gl-4