It depends on where it is leaking & what you are putting in it. You could replace the cover gasket without pulling the box or the lower adj. plug if it has one. If it is the secter shaft seal you will probably need to pull the box out. Most of those old gearboxes wont hold gear grease. Ive always pumped them full of chassis grease. Ive read posts on this website of other type of grease. Some say to use John Deer cornhead grease.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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