thunking when in drive, with brake applied.

[dhe]

I noticed a very slight thunking noise, when my 2001-tracker, with 120K, is in drive, and I'm applying the break. Noise disappears when car is placed in neutral. Most people wouldn't notice, but I'm gifted or cursed, depending on how you want to look at it, with an ability to notice differences, in pitch, noise or vibrations.

I'm guessing it's some component that is suffering from age or wear? It's just something I noticed, and the automatic transmission shifts fine has no problem.

Thanks,
dhe

[fixkick]

that is a gift !

when does it make noise under all conditions, even not happening.

"is in drive" means parked in drive or only moving or both.
or only braking is bad brakes.most times.

braking noise is mostly caused by bad brakes or bad front wheel bearings, or even bad suspension parts.

one trick to help solve only braking noise is to do it while making turns to see if noise goes away or gets worse.

cars can be in vast modes of use, and all matter,
gears, (A/T) do you have 4wd? if yes, the locking hubs love to rust out jam and make huge racket.
turns, or straight.
stopping or not or coasting at any speed, makes noise, (neutral)
acceleration , or deceleration.
fast , slow , up hills , down hills and parked.
lots of modes and more. hot and cold day or hot and cold engine.

the hard part is finding source, and not getting injured, doing so moving, I use electronic stethoscope and 2 man rule. (1drives)

now the best way is can you cause it to make noise not moving at all, if yes, we fix that first, with far less risk.

[dhe]

Thank you for the reply. The noise is so faint, I only hear it when sitting inside my garage. Usually after I've come home for the day.
Pull in to garage. No movement. .. and only then can you hear a slight noise, which goes away when you move the parking gear in to park and remove strain from the transmission.

thanks,
dhe

[fixkick]

Thank you for the reply. The noise is so faint, I only hear it when sitting inside my garage. Usually after I've come home for the day.
Pull in to garage. No movement. .. and only then can you hear a slight noise, which goes away when you move the parking gear in to park and remove strain from the transmission.

thanks,
dhe

seems to me you can hear the sound of automatic transmission oil pump, under pressure in drive.
sounds are not easy to find like that.  

would take having a shop find that.
2 persons to find it.

[dhe]

Ok. Thank you again, next service (unless it stops running of course) is Nov/Dec. I will follow up in the post if anything is found.