3 parts covered
The drivetrain transfers power from the engine to the wheels. This includes the transmission, driveshaft, axles, CV joints, and differential. These components handle tremendous forces and are among the most expensive to repair.
Transmission fluid lubricates, cools, and cleans the internal components of your transmission. Whether automatic or manual, clean fluid at the correct level is essential for transmission longevity. Many modern transmissions are marketed as 'sealed for life' — this is a marketing claim, not an engineering truth.
Total Cost
$100 – $400
Lifespan
30,000 – 60,000 miles
DIY Difficulty
If It Fails
CV (Constant Velocity) axles transfer power from the transmission to the wheels while allowing for suspension travel and steering movement. They contain CV joints protected by rubber boots filled with grease.
Total Cost
$200 – $600 per axle
Lifespan
100,000 – 200,000 miles
DIY Difficulty
If It Fails
The serpentine belt is a single, long belt that drives multiple engine accessories including the alternator, power steering pump, AC compressor, and water pump. It's one of the most critical maintenance items — when it breaks, everything it drives stops working.
Total Cost
$100 – $250
Lifespan
60,000 – 100,000 miles
DIY Difficulty
If It Fails