[Paul]

I like everything about this second video except for your explanation of how the all wheel drive differential works.
the rear differential does not engage because of viscosity but because of a clutch.

As the dual pump fluids name implies there are two hydraulic pumps working. one pump is driven by the drive shaft, the second by the rear axle. both pumps utilize the dual pump fluid. regardless of the fluid use, the differential pressure between these two pumps operates the clutch.

the main reason for using Honda’s fluid is that you can’t drain all the fluid out. You don’t want to introduce additives that may interact adversely with the honda fluids, or products that may have secondary properties incompatible with materials used by honda. This is true of most of the systems where honda is adamant about using their products.

The incomplete drain issue is even more significant for the AT, which DOES rely on viscosity for basic function. A normal drain and fill changes only 30-40% of the transmission fluid.

Personally, I don’t find any significant advantage to using a chemical product from another manufacturer when Honda has recommended a specific fluid, the cost of the materials is relatively small compared the cost of labor needed to completely drain and clean all residue of one product before introducing another.

My question is “why would you go cheap on antifreeze that is good for 110,000 miles?”

[Paul]

The new fluid is still red.

[Author]

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