John Deere Transmission Gear, 2nd & 6th, 36/20 Tooth, for 1020, 2440 Tractor

Part # T21976

Fits Models At A Glance:

John Deere Tractors:

• 820 3 Cylinder, 830 3 Cylinder, 840, 920, 940

• 1020, 1030, 1040, 1120, 1130, 1140, 1350, 1520, 1530, 1550 Before Serial Number 756483, 1630, 1640, 1641F, 1750 Before Serial Number 756483, 1830, 1840, 1850 Before Serial Number 756483,

• 2020, 2030, 2040, 2120, 2150, 2155 Before Serial Number 756483, 2240, 2250 Before Serial Number 756483, 2255, 2350, 2355 Before Serial Number 756483, 2440, 2450 Before Serial Number 756483, 2550, 2555 Before Serial Number 756483

John Deere Backhoe Loaders:

• 300B, 401C

John Deere Industrial & Construction:

• 300, 301, 301A, 302, 302A, 310, 380, 400, 401, 410, 480

John Deere Forklifts:

• 480C

Key Notes:

• Part Numbers: T21976, 172309
• Weight: 3.9 lbs
• Application: Transmission gear, 2nd and 6th
• Dimensions: 36 / 20 tooth, 5-3/8" outside diameter
• Serial Number Notes: Eight models split at Serial Number 756483 — 1550, 1750, 1850, 2155, 2250, 2355, 2450 and 2555 all fit Before that number only.
• Manufacturer: A & I Products
• Replacement Part for John Deere Equipment

Why Choose Broken Tractor:

• ✅ Fifty-One Machines, One Gear: The widest-fitting transmission gear in the John Deere utility line we stock, from the 820 through the 2555 and into the 300 series loaders.
• ✅ One Serial Break, Eight Models: Serial 756483 splits the 50-series tractors, and each affected model is called out rather than left to a footnote.
• ✅ Thirty-Six and Twenty Teeth: Both counts and the 5-3/8" outside diameter are printed, which is how you confirm the gear on the bench.