Rumbling noise from rear end.

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04-07-2016, 12:50 AM

JCLBCA

Thread Starter

Join Date: May 2010

Location: CA

Posts: 7

Rumbling noise from rear end.

Hi all. So I have a 2005 GT(4.6L V8, Auto Trans) and recently it has been making this rumbling/vibrating noise from the rear end when I accelerate from idle and lasts until the car reaches around 10 or 20MPH. I do not hear the noise on the freeway or on the streets, unless of course I stop and accelerate.
Any idea on what this might be?

04-09-2016, 02:03 AM

808muscle

5th Gear Member

Join Date: Oct 2009

Location: Maui

Posts: 4,752

Could be your gears or your rear end clutches. Is the car spinning both tires when doing a burnout? Or just one?

04-12-2016, 07:08 PM

WJBertrand

2nd Gear Member

Join Date: Jun 2012

Location: CA

Posts: 202

Bad wheel bearings will sound like that.

04-13-2016, 10:12 AM

JCLBCA

Thread Starter

Join Date: May 2010

Location: CA

Posts: 7

I have not done a burnout in it recently due to not wanting cause possible further damage, so I don't know if both tires spin or one.
I hope its the wheel bearings or something not so expensive to fix.
I really don't want it to be the transmission.

Other things I have noticed are that the noise usually happens when after I've been on the road after 30 mins or so (driving to work / back from work). The noise happens once the needle hits 10 MPH and goes away after it passes that point.
Best way I can describe the noise is a rumbling / grinding noise.

04-13-2016, 07:42 PM

PNYXPRESS

5th Gear Member

Join Date: Mar 2008

Location: Clermont, FL

Posts: 2,952

My was doing that on slow cornering. It ended up being low on fluid. Have you had the tsb for the turkey baster on the vent tune performed?

04-14-2016, 02:41 PM

Art161

4th Gear Member

Join Date: Nov 2008

Location: California

Posts: 1,495

Try this. In all cases, begin the tests from a stop and accelerate to 20 mph.

Put the transmission lever in position 1. This keeps the transmission in first gear.

Put the transmission lever in position 2. This keeps the transmission in second gear.

Put the transmission lever in position 3. This keeps the transmission in third gear.

When you start in Drive, does the transmission shift from first gear to second gear when you hear the sound?

A question unrelated to the above. Does it make the sound when turning corners (left and/or right) at slow speed? That could indicate a differential issue, which could be expensive, or as inexpensive as changing the differential fluid. If you change the fluid be sure to add 4 ounces of additive friction modifier.