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

ricky bobby

My OCD took over and off to the dealership i went, they were nice enough to drain both engine oil and trans fluid to check for any metal in the fluids. All is well, their GT-R expert explained how the gears were set up and why they sound the way they do. So i will give her(my Z) a bath and smack through the gears with a smile.

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

370Zsteve

How many miles, Ricky? Give it a little time. Me, I'm usually out of 1st gear so quickly I don't even think I could tell you if it makes noise or not.

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SOLD MY Z MARCH 2018 - another Core OG moves on - new ride 2019 Z Corvette Grand Sport - no mods necessary but already have eyes on HFC and intakes LOL IT NEVER ENDS.

ricky bobby

just hit 900

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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

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11Thumper

That's some serious OCD. lol

Sounds like the dealer treated you right though. Good to hear.