John Deere synchro trans February 21, 2022 01:32PM
How much power can 8th gear take in a 4320, and what breaks?

Re: John Deere synchro trans February 21, 2022 01:47PM
I heard of someone turning the high range into a collar shift, involves lots of grinding and welding pinions… maybe someone here knows?

Re: John Deere synchro trans February 22, 2022 02:55PM
Also curious on this

Re: John Deere synchro trans February 23, 2022 10:52AM
First the synchro shell breaks, once you solve that you’ll have trouble with the cast bearing retainers. And at some point the gears just won’t take it.
You can replace the high range pinion with a custom set or just put a 3 speed in and be done with it.
If you have enough power to run road gear you have enough to break the gears.

Re: John Deere synchro trans February 23, 2022 01:51PM
A 3 spd is out of the question for now. No need to crucify. Just simply wondering how I can prolong breaking 8th gear until I get a 3 spd to replace… I know it’s been done, and was wondering what exactly needs to be welded/keyed/strengthened for the time being

Re: John Deere synchro trans February 23, 2022 03:48PM
What weight and tire size & type are you running?

Re: John Deere synchro trans February 23, 2022 04:44PM
10,000 lbs and 20.8-38 single cuts. This would be a hot farm

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