mikeybonz

Hi Everyone i have a issue with my 2000 JEEP CHEROKEE SPORT OF WHICH I Hear a knocking sound coming from where i believe near the drivers footwell or around that area.

i understand this is like a needle in haystack, but i've had the truck worked on and had all U-JOINTS REPLACED AS WELL AS A NEW ( low mileage transfer case) and 1300$ later i'm still hearing this knock.

* When i hear the knock 1. From reverse to drive

2. From drive to reverse

and i hear it MOSTLY WHEN GOING OVER SMALL SMALL BUMPS.

This KNOCK WONT HAPPEN WHEN THE TRUCK IS COLD ONLY WHEN ITS WARM OR WARMER OUTSIDE. HARD TO EXPLAIN

Had the front end checked, everything is tight or so i'm told.

My transmission shifts just fine and i don't feel that might be the issue.

I love my XJ it only has 75k miles and i really don't wanna get rid of this truck just yet, but i also don't want anything to snap off or break while i'm driving.

i've looked around the internet but cant seem to guess on what it could be nor do i want to keep bringing it to shops who cant find and fix the issue.

I guess i'm just looking for some advice on what this could be and maybe if anyone has had a similar issue.

kinda Don't know what to ask or say anymore lol Kinda clueless Do i just drive the truck until something breaks off to find the issue

TRUCK IS MOSTLY STOCK EXPECT FOR Billstein shocks in front and back and Bf Goodrich all terain 235 if that helps or makes a difference.


Thanks mike

SteveMongr

Have the motor mounts been closely inspected or replaced?
The exhaust crosses overtop of the crossmember and is a known culprit for a knock or rattle, worn motor mount will make it worse.
Also need to check that the flexplate/flywheel bolts are tight.

Dumajones

^^^^^this is where I would start,,
Also exhaust might be hitting the crossmember

2000chersport

This. Plus check that the shock bolts are not loose

CCKen

See if you can take a photo of your exhaust isolator like Dumajones posted above, and post it here so we can eyeball it.


You may want to jacket one front wheel clear of the ground and inspect the u-joints on your front driveshaft for play. Not likely with your low mileage but worth a check. Also, grease your front driveshaft slip joint. I'm sure the rear driveshaft slip joint was properly greased with the TC was replaced (?).

mikeybonz

ok guys i will try to get some pictures tommorow once this rain stops

The MOTOR Mounts havent been checked or replaced yet.

thanks

Sideways99

You say stock, meaning not lifted, has any part of the front suspension been replaced? It could also be the bushings in the control arms, they do wear and the stockers aren't exactly bomb proof.

extrashaky

Also check to see if you see evidence that the front drive shaft is banging into the exhaust downpipe.

Larry's XJ

Most all possibilities have been covered as to the noise. My question is, why was TC replaced on such low milege vehical?

mikeybonz

i wasnt able to get any picture of the knocking noise today guys i ran into another problem with my tv/tranmission kickdown cable the black end piece broke off when i dropped my flash light looking at the mounts and such areas

complete dope i am

And the t/c was replaced because AAmco told me they thought the knocking noise was coming from there , after installing the u-joints they put in. Yup i basically took a beating on the price of all u joints and another transfer case and it didn't help at all. Knocking was still there. Just didn't wanna go back to them after i spent what i spent to have it fixed and they couldn't fix it.

Yes the truck is stock expect for the different shocks and bf goodrich tires 235 i put on.

Had someone also say it could be the control arm bushings and i will get a few pics up tommorow.

sorry if i'm alittle clueless on some of these issues guys. I'm just not good with working on the truck or knowing where to look

LSxaaron8800

my 89' has a broken motor mount and the exhaust hits the floor pan. fwiw

mikeybonz

i also had a friend tell me to check this as well I pretty sure where the bushing are but i don't know how to tell if there bad. i will try and get some pics today.

Kinda afraid to show the xj rust!!! lol

Klutch

My 2000 makes sometimes make a knocking sound from the trans tunnel area. It stops if I push down or pull up on the 4WD shifter. Might want to check that just to be sure. It's surprisingly loud, but apparently just part of the shifter mechanism resonating on the steel floor.

JamromXJ

Check your trackbar as well. Make sure it's not moving. My bracket was just a tiny bit loose and it made noises like you describe.

Get a friend to come over and help you move the steering wheel, shift the tranny...etc. you'll never pinpoint the problem without mimicking the problem and getting your ears all over the source.

Keep posting udates. We're here to help. We're THAT kind of community.

Junior Scarlett

Look up flexplate to torque converter bolts. Mine makes an obnoxious noise and I've narrowed it down to this or the flexplate itself being cracked.