When I was in high school, we tried out a used 4630 with a syncro range transmission. That is the only one I have seen personally, but I have also seen a few listed in various classified ads. The 4630 we did purchase had a power shift transmission. Always felt it needed one gear in between 4th and 5th, because that was quite a wide step in between. The Quad Range offered that necessary step in a 4630, and the rest of the 30 and 40 series tractors, but it also was a matter of personal preference. I didn't like the 8 speed transmission with the lack of gears, for heavy tillage, simply because of wanting a gear midway between 4th and 5th. I did like the 8 speed powershift for ease of use by less experienced operators for hauling grain or that sort of work. I also liked the 8 speed powershift for cultivating and planting. I tend to prefer the 8 speed syncro for loader work.
I am not completely positive, but I believe the 8 speed syncro transmission in the 30 series is set up similarly to the earlier 4000 tractor, whereby they lacked synchronizers between for forward and reverse stations in the transmission. They were only synchronized between the forward stations, which is essentially how the quad range is set up, and I believe a quad range is essentially an 8 speed syncro with a hi-lo powershift clutch pack inserted into the drivetrain. I don't want to open up a can of worms here, but the hi-lo in the quad range was Deere's alternative to IH's Torque Amplifier and Ford's Dual Power.
Having had a 4630 powershift; yes, repairing an 8 speed powershift can and does get expensive. Having had a 4640 quad range; repairing one of them can also get expensive.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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