John Deere 4wd quad range configuration

Having only been around the 50 series soundgaurds my entire life i was watching a video on YouTube about pushing silage with a 8630 John Deere when they showed the interior video I noticed the tractor had two quad range shift lever where as the 50 series 4wd only have on and i would love to find a conversion kit to switch my 8450 and 8650 over to row sticks also what were the reasons Deere did this why didnt they just keep the 2 quad levers like in the rigid frame tractors and how hard would it be to convert one
Thanks,
Vince

Are you mixing up a quad range with a 15 speed power shift ?

How to shift a one lever Quad Range on an 8650:

No the 4wd in the 40 and 50 had only 1 stick to shift the quad range i was just curious why they went from 2 to 1 on the 4wd

Only person who would know the real answer is the guy who designed the one lever setup. All we can do is guess.

My guess is one of two things:
1. They wanted it to be more like the powershift setup.
2. They thought operating one lever would be more convenient for the operator than two.

Have you ever been in a stinger ? Two shifters on the dash and one between your legs thats why the tried the one lever to be more convenient

It was likely a Deere sales pitch deal, new model promo
literature probably read something like..new for the 50
series. Proven reliable Quad-range transmission gear
selection with a simplified single lever shifter.. Just like
when they started calling the 466 engine the 7.6 liter. The
claim was assembled with X number fewer parts. Most of
the decrease was due to using a flange headed bolt in
place of a bolt and washer. Not picking on Deere, well
maybe. All brands pull the same crap.

It is quite hilarious that 4wd engineers put two levers on the synchro range and one on the quad, as opposite to the row crop tractors.

On the syncro range, the technical reason was to overcome fr8ction on the shifting cables by giving more throw.

On the 4wd, my fitst tought when I saw one was that they wanted to make sure that gears are shifted to neutral before range ate shifted.
Ir is funny also how Deere brochures brag bout park being in front, while the Deere powershift and the quads 2wd had it at the rear.

To answer your original question, i think it should be easy to convert your tractor to two levers, since they shate same basic tranny as olders 4wd.

The synchro was on available on the 7020 and 7520. Yes the
engineers change their minds about what is best depending
on what they feel like that day

I don't see what was so hard about the one stick lever in the four-wheel drives in the first place place

From the few times I had to use the quad range transmission in a Deere 4wd, I thought the guy that designed that junk should have been taken out back and hung. Not by the neck that was to good for him. They were way to slow to shift for a grain cart and cumbersome otherwise and much to hard shifting the levers worked way to hard to me. The power shift would be the hands down only option for them. A 4wd is a cumbersome outfit for grain carting anyway. I've spent many hours in grain cart tractors of several sizes. From the Kinze 840to the 1240 4955power shift with the 840 would keep up with 5 combines in wheat if the driver knew what he was doing. I did it many times. For corn it is a bit of a challenge with 3 machines though it can be done. Combines can not scatter to the four winds in the field though. We have a 7140 with a 610 Brent. Not a fan of single auger carts with forward hinged augers. To much give if there is a small jerk when moving along the truck dumping leading to the auger leaking. No we don't bolt it down as we need to sometimes fold it for the combine opening up in corn and along trees. Better to fold it down than bed things up.