This case half is designed for Auto 246 Magna Transfer Cases. It has 2 speed sensor provisions near the output shaft. If your case half has only 1 speed sensor on the output shaft then you liekly have a 261/263HD and need case # 12473226.
New Magna 246, 261HD, and 263HD Rear Transfer Case Housing This is a NEW Magna 246, 261HD, & 263HD rear housing, or half as it is commonly referred to. This unit does not include drain and fill plugs or rear output seal. This unit also comes with the driven sprocket support bearing and slip yoke bushing installed. NOTE: You MUST swap over snap ring for rear bearing and drain and fill plugs