2004 Mazda 3 4 cyl Front Wheel Drive Automatic 112000 miles
Every morning I start my car and when I shift it into reverse there is a loud clank from the engine area.
Every time, after the car has sat for awhile, it clanks when shifting into reverse. Only sometimes does it clank when shifting into drive.
I brought it into the mechanic thinking it was something to do with the transmission. He said the transmission is fine and that the noise is coming from the " drivetrain spacer" and it'll cost $500 to fix.
The mechanic said that fixing it is optional, which surprised me because I thought he'd love to take my money. : )
So, here are my questions. What does this spacer actually do? And, should I get it fixed? Will something wear out faster if I don't fix it? Will it affect performance, fuel efficiency, safety, etc?