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West Central MN | That 5>3 downshift in hard pulls is by design. It takes about a hundred horsepower, in less than two seconds, to be applied to the transmission intermediate shaft (memory says it weighs ~400 pounds) to accelerate that shaft from rest at zero rpm and spin it up to speed to make the downshift to 4th gear.
In a hard pull, the engine doesn't have that extra horsepower to give and if the computer forced the downshift to complete into 4th, the engine would stall. Therefore we came up with the strategy looking at engine load, ground speed, etc., to skip 4th and downshift to 3rd, avoiding the spool up of the intermediate shaft, to keep the engine running.
The big slopes in your world makes it difficult but my advice would be if one ever experiences a 5>3 downshift in the flatland world, stop doing whatever one was doing to create that situation in the future. Reminds me of just when one thinks they made something idiot proof, the world invents a better idiot. | |
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