knocking noise

[av8rnik]

I picked up a 1028 over the weekend and on the 220 mile drive home noticed a knocking noise coming from the driver side front wheel well area. it didnt match engine speed, more with vehicle speed but was not consistent. It came and went.

I pulled over a couple times and looked underneath but didnt see anything that might be causing it. It seemed to get a little worse but would then go away. I attached a video with audio, right about the 10 second mark i take my foot off the gas and the noise is a lot easier to hear. Any ideas on what is causing the noise?

Thanks!

 

[Barrman]

Check the easy stuff first. Motor mounts, shifter linkage rubbing anything, transmission fill tube and vacuum tube rubbing, leaf spring ends, leaf spring center pins, t-case cross member and mount. Plus the big one that every CUCV seems to have. Torque converter bolts along with a possible cracked flywheel.

 

[av8rnik]

Okay, I will start looking at that stuff. A question though, wouldn't a flywheel or torque converter match engine RPM/speed?

 

[Barrman]

I had a loose torque converter bolt. It only made noise when I gunned it hard from a standing stop while turning left. I don't know how to explain that. However, you are correct that it should be in time with rpm.

Are your lock out hubs unlocked? Maybe a front u-joint is spinning and bad. This is one of those things you will have to find and then tell us what it was.

 

[av8rnik]

The hubs are and were unlocked when i noticed it. Also, it wasnt doing it right away. It didnt start until about 50 miles into the drive home and after about 20 miles of driving over the weekend.

I also noticed a new squeak this afternoon that was happening when i took my foot off the gas. Since this one is constant i was going to get underneath while it is parked in the driveway to see if i can find anything.

With the u-joint, how do you inspect it to see if it the culprit and going bad?

 

[rtk]

Look for rust around the u joint caps , best way is to pull the drive shaft and check for any loose or binding U joints . As for your other noise , time to get up close and personnel with your CUCV , check EVERYTHING since this vehicle is NEW to you , if nothing else for YOUR piece of mind and everyone's safety .

 

[av8rnik]

Yup, putting all this stuff at the top of my to do list. Thanks ya'll for the input!

 

[antennaclimber]

I had the same issue that you are describing but on the passenger side.
I finally discovered that the top bolt of the left front shock absorber was missing the metal spacer that the bolt goes thru.
Installed a new spacer and the problem was solved.
Karl

 

[engineman2]

Look for loose or dry rotted body mounts as well. They can be quite annoying.