# Montana Farm Revives 1977 'Big Bud,' One of the World's Largest Tractors, for Wheat Harvest

> Big machinery is so sick. That’s why I’ve spent the last couple of years following The Mahan Collection’s Mack M100SX revival, as it’s the largest Mack truck ever made.

- **Source:** [Thedrive](https://www.thedrive.com/news/montana-farm-revives-1977-big-bud-one-of-the-worlds-largest-tractors-for-wheat-harvest?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6abff7e8d215c5c91193147f)
- **Published:** 2026-10-02
- **Category:** Cars
- **Tags:** #largest #montana #tractors #ever #farm #harvest #mack #revives
- **Canonical:** http://localhost:4321/a/6abff7e8d215c5c91193147f

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_GearOpen's distilled summary. The full original article is published at Thedrive (source link above); GearOpen does not republish the source's full text._