The Ford Barn

Bill S · 10-24-2014, 06:30 PM

If in the 3rd member 140 gear oil is used in place of 90 would there be any adverse effects?

TStiles · 10-25-2014, 09:11 AM

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I can speak only of the F Series trucks specs. The owners handbook states for the single speed rear end that the owner use SAE 90 for Winter and SAE 140 for Summer. For two speed, the F-1 uses SAE 90 for all seasons. Because you're in So. Cal, I'd imagine that 140 would be fine year 'round.

There'll no doubt be a number of other thoughts other members will offer up.

10-24-2014, 06:30 PM	#1
Bill S Senior Member Join Date: May 2010 Location: H.B. So. Calif Posts: 411	gear oil If in the 3rd member 140 gear oil is used in place of 90 would there be any adverse effects?

10-25-2014, 09:11 AM	#2
TStiles Senior Member Join Date: Sep 2012 Location: Kitsap Peninsula, Western WA Posts: 276	Re: gear oil Sponsored Links (Register now to hide all advertisements) I can speak only of the F Series trucks specs. The owners handbook states for the single speed rear end that the owner use SAE 90 for Winter and SAE 140 for Summer. For two speed, the F-1 uses SAE 90 for all seasons. Because you're in So. Cal, I'd imagine that 140 would be fine year 'round. There'll no doubt be a number of other thoughts other members will offer up.