With the price of a rebuilt transmission these days at $2000 plus, it’s increasingly important to maintain this piece of machinery more than ever before. What is involved in a transmission service, is a road test; replacing the gasket; filter; fluid and making the necessary band adjustments if adjustable. A good rule of thumb for this service is every 2-3 years or 40 – 50,000 km’s whichever comes first would be sufficient for normal driving conditions. Under heavy-duty conditions, such as towing, perhaps once a year or 20,000 km’s as a transmission operates under extreme temperatures. It’s cheap insurance against a costly repair.