Replace the oil every 100,000km(62,137miles) in a general condition and every 40,000km(24,854miles) in severe usage conditions.
1. Severe usage (marked '*') is defined as
Frequent driving on rough road (Bumpy road, gravel road, snowy road, unpaved road . Etc.)
Frequent driving on mountain road, ascent/descent.
Police, taxi, commercial type operation or trailer towing. Etc.)
2. Transfer&diff carrier lubricants should be changed anytime transfer&diff carrier have been submerged in water