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Old 03-23-2011, 10:21 AM
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Sector box lubrication

I'm installing a Ford F100 steering sector in my hotrod. Clearance to the header will be tight and the sector box will get pretty warm. I don't know what the OEM specs for sector box lubricant were, and I'm not sure what would be the smartest lubricant to use in my application. I'm considering 75/140 synthetic gear lube and lighter grease but I could use help. Feedback would be mucho appreciated!!!

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Old 03-23-2011, 08:13 PM
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I think your worrying needlessly. I have had cars with close tolerances to the steering sectors with zero problems. Having said that, it can't hurt to dump in some synthetic. If the sector has not been rebuilt with new seals it may leak with the addition of synthetic.

Vince
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Old 03-24-2011, 05:43 AM
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Thanks Vince! I'll be rebuilding it before I install so it'll get new seals. The synthetic does seem like my best choice. The Mobil 1 75/140 gear lube seems tolerant of heat and would be my selection. Do happen to know what the original FoMoCo spec for lube in the sector box was? Was it something like a 70-90 gear lube?

Part of the issue with close tolerance to the header is not so much because of heat, but because it makes it almost impossible for me to add more lubricant without removing a header, so I'll be treating the sector as kind of a "sealed" unit once I've installed it.

Thanks much for your feedback.
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Old 03-24-2011, 05:25 PM
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Disregard this if the box you have is different from the GM manual box used in trucks, etc.

My box had what appeared to be the original lube in it when I pulled it apart and it wasn't hypoid or differential-type lube like 75/120, etc. I'd have know by the distinctive odor it has, this lube had no differential lube smell to it at all.

I refilled mine after cleaning and replacing bearings and seals w/multi-purpose lithium chassis grease. This isn't wheel bearing grease, BTW (for those who may read this later)- but an off-white, creamy-textured grease.
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Old 03-26-2011, 09:33 AM
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Thanks for the feedback Cobalt. I finally found an article on line that stated that Ford sector boxes should be loaded with grease rather than gear lube. So I think your comment is right on the target !
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Old 03-26-2011, 09:09 PM
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If push comes to shove you might want to see if using a white lube like Lubriplate would be an acceptable substitute. I just happened to have about half of a 5 gallon tub of the lithium grease I used (it was left over from out shop that closed many years before) that seemed to fit the bill.

BTW, the idea of using grease came from an older GM line mechanic that worked for the Burchfield Chevy/Olds dealership down in FL, when I was restoring a '66 SWB Fleetside PU, ca. 1980. He did a lot of truck work and restored tractors.

Good luck.
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