12/30/2023 0 Comments Differential gear oilThese devices are "calibrated" to the friction characteristics of mineral oils. And who can really blame them?īeen down this road and here are a few answers,įirst, with regards to traction aids, some of the limited slip and locker manufacturers are building units designed before the general availability of syns. I would theorize that THIS is the reason that they don't want to fool with them is that they want a "one-size fits all" approach for the cheapest $$ they can handle. and is more than likely what I would choose if I were going to buy a new car.īut Red Line looks to have a very extensive lineup of gear oils of various weights and thicknesses. For a new transmission, Amsoil MTG could be the very best choice. or at least older transmissions with 150k or 200k+ miles. If the problem was related to actual transmission function, then which "synthetics" did they use? Did they try multiple synthetics? Did they try Royal Purple or Lucas, which both seem to be inferior to Red Line and Amsoil?Īmsoil's MTG gear lube seems like it might be a little too thin for transmissions, honestly. He uses his Jeep for some heavy Off Roading so I don't know if that application has something to do with using a conventional over a synthetic gear oil.Ī "problem with running 'synthetics'" is a rather blanket statement.įirst of all, what type of problem were they having? Was it a financial, "expense", problem? Businesses are in the business of making profit and nothing comes before this one objective. Does anyone know what kind of problems a synthetic gear oil could cause? I didn't have enough time to ask the tech at the Diff and tranny shop what kind of "problems" they've seen and when I asked my boss he just told me that's what the Diff and tranny shop recommends so that's what he runs, which is a conventional Chevron 80w-90 GL-5. My boss told me he runs conventional gear oil in his Jeep differentials also because he has seen problems with running synthetics. I asked a tech what they use in their rebuilt diff units and he told me just regular gear oil and not synthetics because they have had problems with running synthetics. I noticed that they only seemed to have conventional Valvoline gear oil and no synthetics. I work at a shop in SLO CA and the other day I went to a shop that rebuilds rear ends and diffs to pick up some parts.
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