Re: '41 110 Lubrication Questions

Posted by Owen_Dyneto On 2015/10/1 14:27:56

The incompatibility between yellow metals and multi-vis EP gear oils was probably true enough with the gear oils of many (perhaps 40 or 50) years ago, no longer an issue. So unless you've got some very old product, no need for concern; if in doubt read the label - the incompatible EP additives were based on a sulfo/chloro/lead additive sometimes called "SCL".

Important to remember that the gear oil for the differential, regardless of viscosity range, MUST be an EP (or "extreme pressure") or hypoid gear oil, not just a simple multi-vis (or not) gear oil. Though an EP gear oil isn't called for in the transmission or steering gear box, using one in those applications is a non-issue. Like Chad I've been using Valvoline SAE85W-140 for decades with no issues.