Replacement parts library · The part, STL or FreeCAD file How PorkForge worksHow we check our data
PorkForge
Request a part
Menu
No photo yet Have this part? Send us a photo
AM439T

Steering shaft lock knob for John Deere M, MI and MT

Also found as AM801T

Original part (OEM)

Not checked yet

We have not yet confirmed whether the manufacturer still sells it. ✓2 Checked Oct 27, 2026.

PorkForge replacement

Not made yet

No requests yet. Be the first: requests decide what we make.

Part facts

Original part number
AM439TR1
Manufacturer
John Deere
Part type
Knobs
System
Steering
Notes
Lock knob for the steering shaft on John Deere M, MI and MT tractors, listed by one reseller under AM439T and AM801T. John Deere's parts store has no page for AM439T. A listing at $80.00, described as not cracked, bent or broken, had sold out, which is a high price for a knob. Because it locks a steering component, PorkForge treats it as safety-critical.
Last reviewed
Oct 27, 2026 · record pf-jd-0023

Dimensions How to measure this part

Not measured yet. Have this part? Send us its measurements and we will credit the source.

Fits these machines

Model Years Notes Evidence
John Deere M Not recorded — Reported 1
John Deere MI Not recorded — Reported 1
John Deere MT Not recorded — Reported 1

Check against your machine’s serial number before ordering.

Where to find one today

We have not found one listed for sale yet.

Why it is hard to get

  • No longer available: Not listed on John Deere's parts store: the product URL for AM439T returned HTTP 404 on 2026-10-27. This points to NLA but no dealer has confirmed it. 2
  • High used price: Listed at $80.00 and sold out on 2026-10-27; the highest price seen for a knob in this survey. 1

Can this part be made again?

Not eligiblePhysical replacement

Steering-related: excluded as safety-critical under the brief's rules, even though it looks like a simple knob.

Not eligibleSTL / FreeCAD file

We will not offer files for this part.

Sources

  1. Vintage John Deere Parts: AM439T, AM801T steering shaft lock knob aftermarket · checked Oct 27, 2026
  2. shop.deere.com product page for AM439T (returned HTTP 404 Not Found) oem lookup · checked Oct 27, 2026

Not affiliated with or endorsed by John Deere or its successors. The name is used only to identify compatibility. Part numbers are shown for reference. Check fit against your own machine. Spot a mistake?

Verification checklist (4 of 8 met)
  • ✕ OEM part number not yet verified from an OEM or dealer source
  • ✓ Cited by two websites, or by an OEM or dealer source
  • ✓ At least one compatible model with a source
  • ✕ 1 kinds of fact beyond the name (cross-references); 3 needed
  • ✕ Original availability not yet checked
  • ✓ Text and title are distinct
  • ✓ No editorial hold
  • ✕ Not yet reviewed and signed off for search

Related parts

Part no. Part Make Fits Original PorkForge Sources
AM371T replaced by AM34090 Exhaust or air cleaner cap (sources disagree) John Deere M, MI, MT, 40, 320 +3 more Not checked Not eligible 3
AM439T
Original: not checked yet
Request this part