Middlesex County, Ontario | Please let me know if you find any issues in the list Chris, I'm not 100% confident in the entirety of it.
It's a 40 spline shaft with a taper. I'll attach the drawing I sent to Keya (manufacturer of steering wheel motors).
Would you mind posting the part number for the Trimble adapter? The TopCon adapter for this spline is is 1007819-01. The Keya adapter for this spline is "40 spline + cone."
The John Deere list of vehicles all use the same steering wheel part number. That steering wheel fits my CanAm Defender (and vice-versa). I looked up the CanAm Defender steering wheels, and it fits that whole CanAm lineup. 100% confident in all that.
Then I started looking at aftermarket steering wheels and quick disconnect steering wheels. Things that fit Can-Am also fit Polaris, things that fit Polaris also fit Arctic Cat, it kind of spider webbed from there out. My confidence there is high but not quite 100%. I looked around quite a bit for a suitable part to machine myself but it ended up not being necessary.
I have the adapter, steering wheel motor, and a complete AgOpenGPS RTK system to put in, but I actually haven't installed it yet. Going to use it for boundary mapping and frost seeding.
Edited by WildBuckwheat 2/11/2026 11:39
 (Keya_40spline_wTaper (full).jpg)
 (IMG_8224 (full).JPEG)
Attachments
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 Keya_40spline_wTaper (full).jpg (66KB - 2 downloads)
IMG_8224 (full).JPEG (108KB - 1 downloads)
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Auto Steer Side by Side
