Oiling System

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In the rear oil is delivered to the pinion bearings by a scraper/cup attached to the pinion support.

In front applications the oil scraper/cup will not be there as it would block oil flow because the gears are turning in the opposite direction. There are two different oil fill level plugs depending on front or rear application. The lower plug is for stock rear applications and the higher plug is for front applications. ALWAYS fill your diff to the NON-reamed out fill hole plug.

1. Best choice (non-racing): https://www.currieenterprises.com/why-run-conventional-gear-oil OR Torco A248514CE - Torco RGO Racing Gear Oil GL-6
2. Alternate option: fill with a GL-5 rated 85w-140 standard (non-synthetic) gear lube to non drilled fill hole.
3. For rear applications in desert racing use 2 ½ to 3 gallons of Swepco 203 moly- 250 weight available from SWEPCOUSA.com
4. Maximum pinion angle in degrees: rear 15, front 5
5. Proper gear lube AND break-in is much more critical on a high pinion differential because the gears are NOT submerged in oil like a low pinion would be.