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Transmission fluid lubricates, cools and cleans internal transmission parts. Additives in the fluid can deplete over time, not just by mileage. Many manufacturers recommend that it be replaced periodically, in most cases every three to four years. Replacing your transmission fluid and filter according to your vehicle manufacturer’s recommendations helps preserve the life of the transmission and helps maintain your vehicle warranty. Brazel’s RV Performance is an Allison® Authorized Express Lube Center so rest assured that all fluids and filters are genuine Allison® and the services are being performed by specially trained technicians. Our transmission service includes the following: The transmission oil will be drained, the transmission pan will be dropped and inspected for any metal debris, the valve body inspected and both internal and external (if equipped) filters replaced.