The service manual only says to top off the steering gear if it gets low, and cautions against overfilling and forcing grease up to the horn button. So I take that to mean it's good for the life of the truck. Of course Chevy probably never expected them to still be on the road after 70 years.
"If it ain't broke, don't fix it."


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
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.