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#1510182 Sun Jul 23 2023 10:35 AM
Joined: Dec 2014
Posts: 319
29tons Offline OP
What is the correct oil for a 1951 COE steering box?

29tons #1510308 Mon Jul 24 2023 03:49 AM
Joined: Jul 2004
Posts: 4,039
Some people on here have used John Deere corn head grease in them. Does a good job of lubricating and won't leak out as readily as oil will if your seals are bad.

1947 Loadmaster []
1947 Chev. Loadmaster
1959 Chev. Viking 40
Genie: "I am the genie from a magic lamp and I have the power to grant you three wishes."
Me: "I want to be rich."
Genie: "OK, Rich, what's your second wish?"

29tons #1510913 Fri Jul 28 2023 03:44 PM
Joined: Feb 2010
Posts: 448
My 46 2 ton calls for gear lube, I have good seals on it but it leaks through the threads on the large threaded nut for the adjustment. The owners manual states you never have to change the gear oil but gives instructions to add. Maybe no one cared if it leaked back then!!

29tons #1518082 Tue Sep 19 2023 06:09 AM
Joined: Aug 2010
Posts: 60
I rebuilt the manual steering gearbox in my Pontiac, back in the early 1990s. Was told to use CV axle grease because it's kinda liquid yet thick and super EP, being designed to keep Rzeppa constant velocity joints alive. I think I put a pint of it in there, but that was passenger car size versus truck size. It worked, too. Buttery smooth steering for years after, and never leaked a drop.

29tons #1518184 Tue Sep 19 2023 04:30 PM
Joined: May 2015
Posts: 8,110
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
The service manual makes no differentiation between pickup and big bolt steering gears as far as lubrication. It says that added lubricant should be one that's fluid at low temperatures and will not "channel" and which will provide satisfactory lubricant under extreme summer conditions. it says: Steering gear lubricants are marketed by many oil companies and either "Multi-Purpose" or "Universal" gear lubricants are satisfactory to use.
Clear as mud, right? One of the members here drdoug had a supply of NGLI 00 grease he was offering for steering gears. Supposedly Cornhead grease is NGLI 0 so slightly more liquid thicker than 00.

[on edit] I just read that CV joint grease was typically NGLI 1 grade, so thicker than 0 or 00. General purpose grease that's most commonly available for grease guns is NGLI 2

Last edited by klhansen; Tue Sep 19 2023 04:35 PM. Reason: corrected thickness of cornhead grease

Newest Project - 51 Chevy 3100 work truck. Photos []
#2 - '29 Ford pickup restored from the ground up.
First car '29 Ford Special Coupe
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.

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