Usage:
Challenger 65C (2ZJ500-1964),
Challenger 65D (2ZJ1965-up),
Challenger 70C (2YL),
Challenger 75C (4KK500-up),
Challenger 85C (9TK) Agricultural Tractors
Description of Change: A new and improved gear is used on wide gauge Challenger Agricultural Tractors. The gear tooth profile is changed to eliminate a crown needed in earlier machines to accommodate case deflections. The new gear tooth profile improves the life of the pinion and bull gear set by reducing tooth pitting.
Adaptable To: For service, the new 115-9370 Gear is effective with Challenger 65C (2ZJ500), Challenger 70C (2YL), Challenger 75C (4KK500), and Challenger 85C (9TK). Any machine with a 7I-4162 Final Drive Group should now service the 3W-5635 Gear with the 115-9370 Gear. Tractors prior to the above serial number range should continue to service with the 3W-5635 Gear.