Noise Hunting - after turning off engine

[beltwaybandit]

I have a 2007 LR3 (102K).

About 3 seconds after I turn off the engine I hear a metallic hammer/tap (think wrench against the frame). I have a clean indicator pannel/dash lights - nothing seems wrong. No issues when driving/starting etc.

When the LR3 shuts down is there some spring loaded clutch pack or vacuum that is released that could cause this?

Any help/thoughts would be greatly appreciated.

Thanks,
BWB

 

[PaulLR3]

Do you have a locking rear differential? If so, it's the differential motor. Mine was more of a "chirping" noise after I turned off the ignition.

The dealer said that when this motor completely fails, it can lock-up, damaging the differential. By catching this earlier, no damage was done to the differential.

 

[tlt]

Interesting I have never heard this one..

 

[beltwaybandit]

No Locking differential

No, I have a HSE with just the computer controlling the differentials.

I've attached the sound. You hear the purring of the engine, then I switch it off and remove the key so the dinging stops. Then two clicks/clunks.

Thoughts?

 

[Houm_WA]

That (sound) is a new one to me.

 

[BearishDriver]

oh my woow I can hear it strong and clear but have no idea of what may be...
hmmm let's see what the experts on this forum suggest

 

[beltwaybandit]

New Sound Clip

Here is a link to my dropbox where you can hear the sound without the door chime. Again - engine running. Stopping engine. Some background sounds and then clunk, click about 3 seconds after shutdown.

https://www.dropbox.com/sh/ovlatkvfnj0zu2r/AAASU1jdYdmI55ZNM1Qjg3r1a?dl=0

 

[redbadge]

I would drive it on to a ramp and let somebody crawl under the truck see if s/he can find where the sound is coming from

 

[tlt]

It normally is the solenoid on the transfer case.

Can be sorted out by calibrating the transfer case with IID tool that supports it. like autologic machine.

It realy takes a couple of minutes,,,if it doesn’t sort out the problem the solenoid ie: e-diff motor should be changed.

I have plenty of those on hand.

 

[qdan2002]

2005 lr3 makes the same exact noise when turning off engine after the clicks! Any resolution on the bang after clicks!!