2003 Honda CR-V Owner's Manual - Page 262

Rear Differential Fluid Correct level FILLER BOLT WASHER Put a new washer on the filler bolt, then reinstall the filler bolt and tighten it securely. Only use Honda Dual Pump Fluid. Do not use Automatic Transmission Fluid (ATF). The rear differential should be drained and refilled with new fluid according to the time and distance recommendations in the maintenance schedule. 4WD models only Check the fluid level with the rear differential at normal operating temperature and the vehicle sitting on level ground. Remove the differential fluid filler bolt and washer and carefully feel inside the bolt hole with your finger. The fluid level should be up to the edge of the bolt hole. If it is not, slowly add Honda Dual Pump Fluid until it starts to run out of the hole. 262 Maintenance