john deere gear ratios September 25, 2013 10:08AM
can anyone plese tell me the correct gear ratios in a john deere 4430 quad range transmission for the following gears. ratios for 5th, 6th, 7th, and 8th. thank you in advance
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Re: john deere gear ratios September 25, 2013 03:29PM
A Quad Range is 23.3-1 in D4. A Syncro is 21.9-1 in 8th. That is the only one I know.
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Re: john deere gear ratios September 26, 2013 04:28AM
this helps some, but i still need to know the other gear ratios.. kta is pretty sharp on these, is there any possibility he could answer my question?
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Re: john deere gear ratios September 26, 2013 04:27AM
4430 quad gears are as follows
D4 (8) IS 23.2
C4 (7) IS 35.6
D2 (6) IS 38.4
B4 (5) IS 42.1
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Re: john deere gear ratios May 25, 2014 04:19PM
How does the quad shift change these ratios?
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Re: john deere gear ratios May 26, 2014 12:04AM
Number of teeth on counter shaft gear. Quad is 34 teeth and syncro is36 teeth.
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Re: john deere gear ratios May 26, 2014 02:00PM
Thank you for the quick replie but what I was refering to is the two speed shift its self I have a 4440 gear set in my quad on a 4430 transmission that I use to run so in stead of being under and direct I was direct and overdrive, So My question is what is my overall ratio in D4 with the quad shifted in high range? I like to call D5. I recently bought a urmson transmission out of a super farm so I am trying to figure out what gears in the new to me trans I might be able to run.
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Re: john deere gear ratios May 26, 2014 10:32PM
sorry to be off-topic, but, will we be seeing the barncat in New York this summer?or any other of you guys from Vermont?
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Re: john deere gear ratios May 27, 2014 02:19PM
I hope to have it out this year but I am not sure if I will make it to much in NY this year.
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Re: john deere gear ratios for 835 jd gator February 20, 2019 12:21PM
gear ratio for a 2018 835 jd gator
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Re: john deere gear ratios May 27, 2014 07:49AM
The factory 'overdrive' 2 speed is direct in low and 27% over in high. So if you are trying to match the Urmson ratio to your current "D5" it would be 0.7875 x your current ratio.

I hope this makes sense...
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Re: john deere gear ratios May 27, 2014 02:56PM
If your running D4 and what your calling D5 in a quad you would have a 23.2 and a 18.2 ratio.

If you know your tooth counts you can setup a spread sheet and see how all your ratios fall with different head set gears if you have any extras with it.
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Re: john deere gear ratios May 28, 2014 12:52AM
Wow I didn't realize it was that big of a jump, are you sure that it correct
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