Why do I hear a whining sound?

Vbp6US · 09-22-2013, 08:34 PM

Whenever I accelerate hard in 2nd or 3rd gear, I hear this whining sound coming from the back. I can't pinpoint it exactly unfortunately.

I know it's not the ECM because I got that replaced under warranty a long time ago and it's silent in the cabin when there is no music on. It's something mechanical. I've replaced the transmission and diff fluid to redline but this noise is relatively new.

Any ideas?

Thanks

DEpointfive0 · 09-22-2013, 10:27 PM

Check the hooker in the back, make sure she isn't whining

SouthArk370Z · 09-22-2013, 10:34 PM

It's been a couple of hours and none of the experts have answered, so here's my $0.02 worth. Maybe someone with more knowledge will chime in soon.

Did the whine start shortly after changing the diff fluid? If so, I would suspect that the Redline is "thinner" than what you had before. Especially if it is more pronounced once the diff warms up. Whether that's good, bad, or indifferent, I dunno.

olddudesrule · 09-23-2013, 11:17 PM

Have to agree with South. Whine from the rear end has always been gear related for me, especially if I switched to a lighter gear oil after a ring and pinion swap. It's like the whine you get by switching from timing chains to timing gears, just not as pronounced.

NickTurnon · 09-23-2013, 11:28 PM

Check this thread. Not sure if this is what you are experiencing..
Faint whine sound under throttle?

09-22-2013, 08:34 PM	#1 (permalink)
Vbp6US Enthusiast Member Join Date: Nov 2011 Location: SoCal Posts: 442 Drives: 2009 370z MB 6MT Rep Power: 14	Why do I hear a whining sound? Whenever I accelerate hard in 2nd or 3rd gear, I hear this whining sound coming from the back. I can't pinpoint it exactly unfortunately. I know it's not the ECM because I got that replaced under warranty a long time ago and it's silent in the cabin when there is no music on. It's something mechanical. I've replaced the transmission and diff fluid to redline but this noise is relatively new. Any ideas? Thanks

09-22-2013, 10:27 PM	#2 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	Check the hooker in the back, make sure she isn't whining Baer383 and Wonka2581 like this. __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

09-22-2013, 10:34 PM	#3 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	It's been a couple of hours and none of the experts have answered, so here's my $0.02 worth. Maybe someone with more knowledge will chime in soon. Did the whine start shortly after changing the diff fluid? If so, I would suspect that the Redline is "thinner" than what you had before. Especially if it is more pronounced once the diff warms up. Whether that's good, bad, or indifferent, I dunno. DEpointfive0 likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

09-23-2013, 11:28 PM	#5 (permalink)
NickTurnon A True Z Fanatic Join Date: Jul 2011 Location: Scottsdale Age: 33 Posts: 1,636 Drives: 09 BS 7AT 370z Rep Power: 18	Check this thread. Not sure if this is what you are experiencing.. Faint whine sound under throttle? __________________ 2009 Brilliant Silver BASE 7AT \| TEIN S-Tech Springs \| K&N Drop Ins & z1 Maf Tubes \| AAM S-Line Short Tails \| 5% Tint \| 20MM Spacers \| Sport Spoiler NickTurnon's 370z Build

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09-23-2013, 11:17 PM	#4 (permalink)
olddudesrule Enthusiast Member Join Date: Apr 2013 Location: Gilbert, AZ Posts: 252 Drives: 2012 Nismo Rep Power: 12	Have to agree with South. Whine from the rear end has always been gear related for me, especially if I switched to a lighter gear oil after a ring and pinion swap. It's like the whine you get by switching from timing chains to timing gears, just not as pronounced.