Can I put GPS guidance on an old tractor?
Yes, and the tractor's age is almost irrelevant — none of the four pieces cares what year it was built. The steering motor clamps where the wheel sits, so there is no hydraulic plumbing and nothing to integrate with a computer the tractor doesn't have. An open station is fine; a 1948 tractor is fine. What actually matters is the condition of the steering box, not the date on the hood.
What actually works
A column-mounted motor, a receiver on the roof, a tablet, and a control board. The original steering wheel bolts back on top of the motor.
$1,000–1,300 in partsThe shortcut everyone tries first. A phone is accurate to metres; guidance needs an inch.
Free, and worth itThis is the one real disqualifier. A worn box means the wheel turns before the wheels do, and no amount of correction closes a gap the machine can't feel. Fix it the old way, with a wrench, before you spend anything on electronics.
RTK needs a clear view of it. Heavy tree cover and barns are where guidance stops, on any system at any price.
Run the numbers
- Autosteer: dealer quote vs. built yourself → — free calculator, works offline.
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