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John Deere Tractors Discussion Forum

8000 series vs. 8020 series

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Jamie K

11-27-2004 15:55:23

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I currently own a 1995 JD 8100. I am thinking about trading it in for an 8120. I just wondered if anybody knew if the transmission was any better in the 8020 series. Since mine was the first year for the bump shifter it seems really jerky and has a lot of power hop as well as shifting hard. I heard rumors that JD improved the transmission in 1998, then improved it even more in the 8010 series. I guess the 8020 series is suppose to be flawless. So, my question is, Is the transmission better or the same? If it is the same i think i"ll just keep my 8100.

Thanks

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G/MAN

11-29-2004 15:56:56

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Re: 8000 series vs. 8020 series in reply to Jamie K, 11-27-2004 15:55:23

I'm a JD tech and work on a lot of 8000/8010/8020 tractors. Yes, the early 8000s do shift rough, relatively speaking, and although with enough tweaking and calibrating you can make them shift decent, you'll never make them shift as well as a 8000 above serial number 20,000 or an 8010 (the late 8000s and the 8010s have very similar transmissions and shift characteristics if everything is right), and nowhere near an 8020. They really got it right in the 8020s and they shift very well. Still, over time, parts wear and fill and spill times change and a recalibration every 500-1000 hours will really keep them shifting well. The deterioration in shifting is so gradual that most owners never notice, until they bring it in and a technician notices how rough it is. I've driven tractors that darn near threw me out of the cab and had the owners say they never noticed anything wrong. We probably have 25 or more 8020s out, everything from an 8120 2wd to half a dozen 8520s, and they're doing alright. There were a lot of initial problems with the new SCVs, but most of those issues have been hammered out. And there were some problems with the new hood design and air filters plugging, but that seems to have been solved as well. The ILS has been outstanding, although it's certainly not a cheap option. The Active-Seat has also been pretty good reliability-wise, and I wouldn't consider ordering an 8020 without it. Put the ILS and A-S together (8520s come standard with both) and you'll think you're in a Cadillac crossing the field. One thing that's very important is a clean fuel supply, as the filtration required to maintain the common-rail fuel systems is incredible. They updated the earlier systems to a 10-micron primary element and a 2-micron secondary element, so it takes very little trash in the fuel to contaminate them. You definitely don't want to bounce your fuel trailer across the field and then immediately fill up the tractor, and you want good quality filters on your home tanks and your fuel wagon pump. I'll wind this up, but if there's any other questions I can answer for you, email me at [email protected]. I'd be happy to tell you anything I can about the 8020s.

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Josh in Indiana

11-28-2004 19:06:15

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Re: 8000 series vs. 8020 series in reply to Jamie K, 11-27-2004 15:55:23

On our farm we have a 95 8100 with the black stripe and then we have a 97 8100 wil the all yellow stripe on the hood. Ive spent many hours in bot of these tractors doing everythign from mowing to drilling beans to disking. I can tell you this. Any newer 8000 series tractor you buy will shift smother than those older ones. Its a world of difference between the two as to how smooth they shift. Just my opinion

Good luck
Josh

P.S. Our older 8100 has the transmission update kit in it and it still shifts hard

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billyiron

11-27-2004 18:39:50

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Re: 8000 series vs. 8020 series in reply to Jamie K, 11-27-2004 15:55:23

I have a 8120 and 8520, and have had 8300,s the 83,s were a 97 and 98 model, both 83,s shifted pretty good, the 20 series does shift some better, but still has a good jerk in several spots at 4th to 5th and 12th to 13th ,, the 85 is the best shifting, but has more hours so maybe its broke in better,as far as power hop, get the ILS front end it will totally eliminate the power hop, we pull a 33 ft sunflower disc and 45 ft JD 980 field cultivator and the 8520 will not hop, and on the road the ride is really good, the lope is taken out, you need to get a 20 series in the field for awhile, I think you will find the 8120 seems somewhat larger than the 8100, our 8120 seemed really dead when new but is a lot better now, the 8120 has standard mfwd if I were to trade I would get the ILS on the 8120 as well, the 8520 is a real hoss, major balls---pulls anything, lots more stuff to talk about thats good on the 20 series but I will get off my soap box,, good luck trading;;;;;; billyiron

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