Mikeythrash

So my dad was in my Jeep last night. In passenger and while in park he said what the hell do you hear that. And I said yea this is the noise ive been talking about. A grinding noise he said could feel it right under his feet. This noise only happens when in park and if I am at a light or stop sign then accelerate then it doesnt make the sound. He was saying it could be the tcase cause there is only so much that moves when in park that could make a noise like that. I also never checked my 4wd I do know previous owner used it I know the guy and remember it worked well. I just have not had time for wheeling and no need to use it yet on the roads. So what do you guys think thia grinding sound noise could be. And how do you know if your tcase is bad. How many other things could cause this noise.

Also its a 99 xj sport 189,000 miles

md21722

Nothing moves inside the transfer case unless the wheels are moving. Probably a cracked flex plate?

cruiser54

Or bad trans mount allowing the exhaust to vibrate against the crossmember.

CCKen

The Park Lock Pawl in the trans may be defective - not fully engaging in PARK. A functioning Park Lock Pawl locks the trans main shaft so there's no output from the trans, therefore the TC is out of the picture.

Position the Heep on an incline, place the trans in PARK, engine off, see if the Heep rolls and/or you hear the noise again

md21722

Where can you get one of these besides the JY ? Dealer says they are NLA.

cruiser54

Parts store.

md21722

do you have a part number?

cruiser54

For the trans mount?

md21722

I thought you were referring to the exhaust hanger at the trans mount. That is what is NLA at the dealer.

CCKen

In an attempt to uncobble the terminology here...

In Cruiser's pic, the "Trans Mount" is called a Bracket, Transmission Mount. The "Exhaust Hanger" is the rod welded to the front exhaust pipe.

The Bracket, Transmission Mount, is OEM part number 52058882.

New ones are not obtainable. Junk yard ones will have the sagging rubber, more than likely.

OP, did you look at the hanger to see if the hanger rod is bent over, or is your rubber worn out, like in the pic, or both? The hanger rod can be bent downward using a jack to raise the exhaust pipe and forcing the rod downward, then welding it in place. This will help raise the pipe off the crossmember.

I inserted a bushing in my rubber piece which helped. I don't have pics of it right now and need to upload them to my photobucket account.

Bottom line...is this your problem?

XJwonders

I told u few times to replace the exhaust hanger mount....

Mikeythrash

For what I have been reading sounds like torque converter shift linkage. It doesn't almost make the sound and its a light grinding sound . When I am in park sometimes it makes a bang noise but not always. When I have a little hill or anything vertical it goes back a tiny bit then stops.

Mikeythrash

I really think it's the torque converter I had an audio clip recorded if anyone wants to hear it and figure it out everyone that heard it said torque converter

CCKen

Mickey,

If you think it's a bad Torque Converter you may want to try this simple test (below). It may have nothing to do with your problem but it has revealed a bad Torque Converter in the past that was making noise.

If you don't see the fluid level drop to the bottom, as described, the TC could be defective.

Mikeythrash

Ok I'll do the test as soon as I can and follow up with updates.its a grinding sound right below me really loud in the morning when it's real cold out then once in drive it's not as loud.gets loud at stop signs lights and turns you hear it the most.