How do you harness that powertrain and keep control in hands of the driver? But it does have a stability and steering problem. We’ve never been disappointed in these things and we weren’t disappointed this year. Like snappy acceleration, above average top speed, quality engineering, comfortable and workable seat and suspension. This was our third year of testing powerful 440’s from this farm implement company that has made quite a niche in the snowmobile industry. Still not satisfied, the muscular 440 swept the quiet sweepstakes, producing only 72.2 db(A) at 50 feet.īut even Achilles had a heel and so did the JDX-8 we rode at Rabbit Ear’s. Top performers normally don’t get good gas mileage, but in an 8-mile economy run the JDX-8 came in with 18.2 mpg, good enough for anyone’s trail ride. Then the JDX-8 took on the drawbar pull, muscling 325 pounds to return to its second place status, and at the same time losing only 500 rpm on backshift, bettering the average of the 440 fans there. The’ Deere dropped to third in delivered horsepower to the track with 28, only two hp off the winner. On the dyno, the JDX-8 also clicked off 0 to 60 in 11.4 seconds to grab second in that class, too. On the dyno, Deere continued its quality showing, hitting 70.8 mph under no load for a fifth place finish and capturing second place in top speed under a loaded condition equivalent to 5 inches of powder snow with 57 mph, besting the average by 6.5 mph. Top speed in the snow was 61 mph, well above average. The JDX-8 zipped through the ¼-mile acceleration run in 19.7 seconds and ate up the ½-mile course in 12.2 seconds, for third and fourth place finishes. John Deere’s top of the line 440 looked like quite a top performer after all 13 of SNOW GOER’s mechanical tests on top of Rabbit Ear s Pass.
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