The 1965 Chevrolet M22 Rockcrusher .
Across the top of the page are the words "First Build 4/15/65 – 1st Shipment 4/19/65, recap of M22 (Rock Crusher) Trans." By comparing these M22 transmission assemblies to Chevrolet''s 1965 transmission identification codes, I found a perfect match. This transmission identification code list was issued by the Chevrolet Facilities and Product Planning Department Planning Section. This ...