Sorry Clem, I should have said 4000 - 20 series (ie 4120, 4320,4520, and 4720). These are the ones with the American-made JD Powertech engines. Also, my 4120 has been completely trouble-free in the 5 years I have owned it, proving to me once again, just like all my Chevy trucks have, that Americans still build fine-quality products. I will admit there are some sub-par products produced here, such as my wife's Ford Windstar van that basically self-destructed electronically after (5) years and which she replaced with a Toyota (for some reason, Chevy stopped making mini-vans). Chevy trucks and John Deere tractors have never let me or the last (3) generations of my family down and I have no reason to think they ever will. My 2000 3/4-ton Silverado still runs like it did when new, as does my grandad's 1950 JD M.