8N Gear OIL

Lee in NC · Apr 25, 2011

I just purchased Travelers 80-90 wt GL-5 Gear Oil for my 8N. Is this the right oil to use for transmission and Lift?

old · Apr 25, 2011

Some say no. What most say you need to use is the GL-1 which is a bit hard to find. Something about yellow metal friendly which the GL-5 isn't suppose to be

Dell (WA) · Apr 25, 2011

Lee........I'm so glad you asked 'stedda' searching the archives at the top of this great N-Ford forum.

We do NOT recommend GL-5 'cuz it is NOT brass friendly. There are brass parts in yer tranny and hydraulic pump.

While the original hydro-tranny oil was spec'd as 80wt gear oil in 1939, ittza kinda rare and hard to find. HOWSOMEVERS: GL-1 is a close approximation. Ford/New-Holland now specs: MS-134D hydro-tranny fluid which is about 60wt. Many complain that the THIN 60wt does not do well in worn hydraulic pumps and cylinders. Yer call, I use 134D ........Dell

Lee in NC · Apr 25, 2011

is a mixed bag of opinions. I used a oil recommended by agri supply that was labeled trans hyd gear lube and the gears chatter. I will swap the GL5 for GL1 and see if I can calm the old girls chatter. The oil in tthere wje I started looked somewhere between river water and mud depending on level of sump. My 1st sentence of post was supposed to have read archives on this subject is a mixed bag based on different exp sort of like asking what is the health of a 60 year old. Y
thanks

Gaspump · Apr 25, 2011

You are once again a little confused about the original 9N gear oil specs so once again here it is. "Mild EP SAE 90 at all temperatures above freezing. SAE 80 for winter use". Not my choice but GL-5 may be used especially if it is tagged yellow metals safe. I have seen many an N with GL-5 in them and saw no tranny or pump brass parts damage from it.

8N Gear OIL

Lee in NC

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old

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Dell (WA)

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Lee in NC

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Gaspump

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