Drivetrain CLUNK during Low speed Acceleration is this normal? (youtube video)

Gunzero · 03-22-2011, 12:35 AM

Quote:

Originally Posted by Grunj

So that's normal and nothing to be worried about? I'm definitely having the above issue when I disengage the clutch from 1st to 2nd and less so from 2nd to 3rd. You can hear that it kind of has an echo to it. Just got the car this week ('09 with 5000 miles). Admittedly, I'm still getting used to the clutch and especially how the RPMs like to stay high and come down slow when you push in the clutch and are off the gas. And as you can see/hear, letting off the gas doesn't alleviate the problem. YouTube - 370Z clutch THUMP Thump thump.

That's not normal.
What RPM are you shifting @?

Boost_lee · 03-22-2011, 12:45 AM

Im getting a clunking noise also, its usually in first gr or reverse. And it happens when completely off the clutch. I cant pinpoint where the sound is coming from, but I checked the front end and exhaust, both seem fine. I'm going to check the rear axle nuts next week, hoping its something easy...

Grunj · 03-22-2011, 01:45 PM

Gunzero,

I'm shifting right around 3-4000 RPM. Thanks!

Gunzero · 03-22-2011, 02:27 PM

Quote:

Originally Posted by Grunj

Gunzero,

I'm shifting right around 3-4000 RPM. Thanks!

It shouldn't sound that way then.. I don't know what the problem is. Perhaps, a bad clutch. You're welcome

I'll try to post a video of the way my clutch sounds. TTYL

Gunzero · 03-22-2011, 02:27 PM

Quote:

Originally Posted by Boost_lee

Im getting a clunking noise also, its usually in first gr or reverse. And it happens when completely off the clutch. I cant pinpoint where the sound is coming from, but I checked the front end and exhaust, both seem fine. I'm going to check the rear axle nuts next week, hoping its something easy...

What does it sound like?

Unclemeaty · 03-22-2011, 03:21 PM

I second; everyone should check your rear axle nut on the driver's side. 2009 370z did not use a locking sleeve over the axle nut like 2010 and 2011 model Zs, and this can cause the axle nut to loosen up about 2-4 turns before being stopped by the cotter pin. Threadlock, a 1.25" deep socket, and a proper torque wrench should do the trick.

thezmonster · 03-22-2011, 07:55 PM

Quote:

Originally Posted by Unclemeaty

I second; everyone should check your rear axle nut on the driver's side. 2009 370z did not use a locking sleeve over the axle nut like 2010 and 2011 model Zs, and this can cause the axle nut to loosen up about 2-4 turns before being stopped by the cotter pin. Threadlock, a 1.25" deep socket, and a proper torque wrench should do the trick.

Mine was loose less than 6 weeks ago, had to tight it up and I double checked the pass side and it tight

OKC Z · 03-23-2011, 07:33 AM

Wow! You all got me worried. Because mine makes noise going and coming out of first. I dont know much about this kind of stuff. Which bolt are we talking about in the left rear axle? I dont have the smallest idea. Can someone do me a huge favor and explain to me more or less which one? Does anyone have a pic of it or the general area where it is? Thanks a bunch in advance. I dont have warranty due to mods and I cant really afford for anything to break on this thing. Thanks.

Prosport Gauges · 03-24-2011, 09:58 AM

Z is doing the same thing. Ill be putting it on the lift and taking some pics for everyone

Grunj · 03-24-2011, 12:20 PM

Quote:

Originally Posted by Ryan@prosportGauges

Z is doing the same thing. Ill be putting it on the lift and taking some pics for everyone

The same thing as mine (clunk when disengaging clutch?) or as GonGo's?

thezmonster · 03-24-2011, 01:01 PM

Size 32mm deep socket

aling lukring · 03-25-2011, 04:28 PM

any pics or videos yet? ive had this for almost two years now and dealers say its normal but i never had this clunking noise in other manual. glad to know theres a solution for this.

Boost_lee · 03-25-2011, 10:26 PM

Anyone have the torque spec for the rear axle nuts from the service manual?

ChrisSlicks · 03-26-2011, 08:11 AM

Quote:

Originally Posted by Boost_lee

Anyone have the torque spec for the rear axle nuts from the service manual?

The service manual says 133 ft/lbs (180 Nm).

Boost_lee · 03-26-2011, 09:20 PM

Thanks

03-24-2011, 01:01 PM	#26 (permalink)
thezmonster Base Member Join Date: Aug 2009 Location: Charlotte Posts: 221 Drives: 09 Nissan 370z CB M6 Rep Power: 16	Size 32mm deep socket __________________ ZMONSTER!

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03-22-2011, 12:45 AM	#17 (permalink)
Boost_lee A True Z Fanatic Join Date: Feb 2009 Location: SATX Posts: 2,813 Drives: 09 370Z TT 6MT Rep Power: 29	Im getting a clunking noise also, its usually in first gr or reverse. And it happens when completely off the clutch. I cant pinpoint where the sound is coming from, but I checked the front end and exhaust, both seem fine. I'm going to check the rear axle nuts next week, hoping its something easy...

03-22-2011, 01:45 PM	#18 (permalink)
Grunj Base Member Join Date: Mar 2011 Location: Los Angeles, CA Posts: 4 Drives: 09 Nissan 370Z BluM6 Rep Power: 14	Gunzero, I'm shifting right around 3-4000 RPM. Thanks!

03-22-2011, 03:21 PM	#21 (permalink)
Unclemeaty Base Member Join Date: Aug 2010 Location: Atlanta Posts: 203 Drives: 150cc Scooter Rep Power: 15	I second; everyone should check your rear axle nut on the driver's side. 2009 370z did not use a locking sleeve over the axle nut like 2010 and 2011 model Zs, and this can cause the axle nut to loosen up about 2-4 turns before being stopped by the cotter pin. Threadlock, a 1.25" deep socket, and a proper torque wrench should do the trick.

03-23-2011, 07:33 AM	#23 (permalink)
OKC Z Base Member Join Date: Feb 2011 Location: OKC Posts: 205 Drives: '09 370z-$old 9/1/12 Rep Power: 14	Wow! You all got me worried. Because mine makes noise going and coming out of first. I dont know much about this kind of stuff. Which bolt are we talking about in the left rear axle? I dont have the smallest idea. Can someone do me a huge favor and explain to me more or less which one? Does anyone have a pic of it or the general area where it is? Thanks a bunch in advance. I dont have warranty due to mods and I cant really afford for anything to break on this thing. Thanks.

03-24-2011, 09:58 AM	#24 (permalink)
Prosport Gauges Banned Join Date: Mar 2010 Location: Tampa Posts: 339 Drives: 2009 370z Rep Power: 0	Z is doing the same thing. Ill be putting it on the lift and taking some pics for everyone

03-25-2011, 04:28 PM	#27 (permalink)
aling lukring Base Member Join Date: Aug 2009 Location: florida Posts: 67 Drives: 09 370z silver 6spd Rep Power: 16	any pics or videos yet? ive had this for almost two years now and dealers say its normal but i never had this clunking noise in other manual. glad to know theres a solution for this.

03-25-2011, 10:26 PM	#28 (permalink)
Boost_lee A True Z Fanatic Join Date: Feb 2009 Location: SATX Posts: 2,813 Drives: 09 370Z TT 6MT Rep Power: 29	Anyone have the torque spec for the rear axle nuts from the service manual?

03-26-2011, 09:20 PM	#30 (permalink)
Boost_lee A True Z Fanatic Join Date: Feb 2009 Location: SATX Posts: 2,813 Drives: 09 370Z TT 6MT Rep Power: 29	Thanks