Transmission oils
Posted: Fri Mar 28, 2014 11:06 pm
This was covered in a post three years ago but for some reason I couldn't add any updated comments.
V8 burble, Feb 15 2011:
I've just rebuilt my gearbox with a parts kit from David Kee, who should know his way around Toploader's. In the "Oiling instructions" he says to "Fill up your Toploader with any quality 75W-90 gear lubricant". http://www.davidkeetoploaders.com/specifications.htm Is this because monograde transmission oils aren't so readily available in the US?
So who's right?
V8 burble, Feb 15 2011:
Ok I understand the need to use GL4 type oils. I know the Tiger handbook states EP80 for the gearbox. Was this just because mulitgrade transmission oils weren't available back then.Monograde oils are recommended for the Tiger gearbox (3.25 pints of EP80) and rear axle (2.5 pints of EP90).
EP80-GL5 oil contains high levels of sulphur which will attack the phosphor bronze components in a Ford Toploader gearbox. This GL5 oil must NOT be used in the original Tiger gearbox.
The correct oil for the Toploader is EP80-GL4, which contains a lower amount of harmful sulphurous additives.
The Tiger's Salisbury 4HA rear axle has no “yellow metal” components so it is okay to use either an EP90-GL4 or a GL5 oil.
I've just rebuilt my gearbox with a parts kit from David Kee, who should know his way around Toploader's. In the "Oiling instructions" he says to "Fill up your Toploader with any quality 75W-90 gear lubricant". http://www.davidkeetoploaders.com/specifications.htm Is this because monograde transmission oils aren't so readily available in the US?
So who's right?