Traded 09 A/T for 11 M/T --Quick Question

ricky bobby

just hit 900

__________________
If you ain't first, you're last!

ImportConvert

At 900 miles, the transmission is still on the tail-end of wearing in.

So many people think that you break in an engine on a new car. Yes, you do, but you are also breaking in the clutch, brakes, wheel-bearings, axles (some cars), differential(s), and all the gears/bearings in the transmission.

Varying your speed, not loading the transmission/rear-end 100%, not launching or shifting it in a way that would "shock" the drive-line, and making sure to accelerate smoothly AND decelerate smoothly (helps the rear faces of the gears in the drive-line wear in, as well as providing more vacuum in the engine to suck the piston-rings against the cylinder walls) will yield a drive-line that has the most potential to operate quietly.

I know many people say engines break in in a few miles, blah blah blah, but that was not my experience with my Z06. It sooted up the tail-pipes badly for the first 2-400 miles. Burned through about 1/2 quart of oil.

Changed the oil at 600 miles, and it has not used a drop since, and the tail-pipes are properly soot-free even after spirited driving.

I think a lot of "noise" has to do with the break-in process, although the pre-load and after-load on the gears in the transmission, as well as the profile of the teeth, are suspect as well. Not necessarily bad, very likely "nature of the beast" type stuff.

Jordo!

This is what I have heard from multiple engine builders/tuners as well and it's the method I have used to break in new engines.

So far so good -- and on the 370Z, happy to report ZERO oil consumption

__________________
Enjoy it. Destroy it.