The Ford Barn

Ianrhall · 07-14-2015, 05:53 PM

I want to change the oil in my old truck, has the 3 speed floor shift box.
How much oil will I be needing?
Thanks
Ian

rheltzel · 07-14-2015, 06:11 PM

2 1/2 pints. I use 80w-140. Fill until just below upper fill hole on side of tranny.

30-9 · 07-14-2015, 06:24 PM

I used Gl1 (very important) weight is personal preference I used Napa 90wt

JSeery · 07-14-2015, 06:26 PM

GL-1 or GL-4 I would go with the GL-4 it has much better gear load protection.

flatheadmurre · 07-14-2015, 10:30 PM

Sponsored Links (Register now to hide all advertisements)

Just check that the oil is redmetal safe if going for a higher API rated oil.
A lot of the modern oil additives are designed to work with redmetals, if not your syncros will be harmed.

07-14-2015, 05:53 PM	#1
Ianrhall Senior Member Join Date: Apr 2014 Posts: 253	3 speed gearbox oil I want to change the oil in my old truck, has the 3 speed floor shift box. How much oil will I be needing? Thanks Ian

07-14-2015, 06:11 PM	#2
rheltzel Senior Member Join Date: Jul 2013 Location: Sacramento, CA Posts: 368	Re: 3 speed gearbox oil 2 1/2 pints. I use 80w-140. Fill until just below upper fill hole on side of tranny.

07-14-2015, 06:24 PM	#3
30-9 Senior Member Join Date: Aug 2014 Location: MA Posts: 888	Re: 3 speed gearbox oil I used Gl1 (very important) weight is personal preference I used Napa 90wt __________________ Thanks - 30-9 1939, 1940

07-14-2015, 06:26 PM	#4
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: 3 speed gearbox oil GL-1 or GL-4 I would go with the GL-4 it has much better gear load protection.

07-14-2015, 10:30 PM	#5
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: 3 speed gearbox oil Sponsored Links (Register now to hide all advertisements) Just check that the oil is redmetal safe if going for a higher API rated oil. A lot of the modern oil additives are designed to work with redmetals, if not your syncros will be harmed.