I own a Honda Pilot that has about 20k miles on the odometer and is 1.5 years old. The Maintenance Manual calls for the replacement of the VTM-4 rear differential fluid "every 15k miles up to 30k miles or every 1 year, then every 30k miles or 2 years." So, I guess replacement is due. Have I done any harm by waiting so long? I haven't even looked under the rear of the car iet. What's involved in replacing the fluid? What type of special fluid is required(Honda I presume)? Any special tools necessary? Any other parts required? I'd appreciate any tips or advice. THANKS ~pjw