The transfer case is always working, whether you use the four wheel drive on your vehicle or not. Your transfer case fluid level should be checked every time that you get an oil change.
In the old days, transfer cases were filled with gear oil or automatic transmission fluid (ATF), but some modern transfer cases take specialty lubricants.
You should consider getting your front or rear differential fluid checked more frequently if:
- You frequently tow a boat, caravan or trailer
- Your vehicle’s rear axle is partly submerged when you launch a boat from a boat ramp
- You drive in severe conditions e.g. road covered in snow
- You are an off-road enthusiast and cover rough or wet terrain
Heritage Paint and Body maintains rear/front differentials and transfer cases for all vehicle types.