Groan post bilateral CV and Brake pads

[100s]

I have a bizarre groan, mostly prevalent when letting off of the gas, mostly inconsistent, sometimes when braking, uphill, downhill, ACH on or off. Just had both front CV’s replaced and new pads all the way around.

I can generally hear it (and feel it in the steering wheel and floorboard) mostly at lower speed. Most easily replicated when letting off of the accelerator. But I’ve had it while braking and not decelerating as well.

Excuse my ankle in the video, you will hear a sort of low tone groan as I ease off of the throttle. A couple of times it is short, then at the very end a little longer.

 

[Biga27110]

I cant hear much of anything but if you hear a strange sound like quacking or squaking, it could be your brake master assembly going bad. Check for the sound there. I believe its the pump or accumulator on the master assembly.

 

[100s]

GOPRO - much better.. you can hear a clunk, and then the sort of rubbing or groaning sound. Can't duplicate with suspensing by rocking the rig. Clunk at 2 secs and groan at 5.

 

[Biga27110]

Im more worried about the clunking sound that seems pretty bad. Have you checked the shock for play or anything related to the shock making the clunk and groan?

Check UCA ball joint might be a clunk there when load is released.

 

[100s]

Im more worried about the clunking sound that seems pretty bad. Have you checked the shock for play or anything related to the shock making the clunk and groan?

Check UCA ball joint might be a clunk there when load is released.

ACH shocks..

Also wondering if it might not be one of the diff bushings..

 

[Bisho]

Did you have new hubs installed with the new CVs? If not, I'd check for play at the hub. Also, when were the u-joints last greased? Everything in the video looks tight. I don't see anything moving asynchronously.

 

[Land Shark]

Check the drive flange. If not replaced could be those

 

[100s]

Groan appears to have been a shock bolt on the passenger side that needed snugging up. Assuming most of the clunk is diff bushings so moving to that next on this one. the 02 is about to get some love with new axles too..

 

[100s]

Well, less prevalent but still there. Could this be AHC?

 

[100s]

Well, I believe we have a winner..

It appears the headlight assembly was rubbing on the fender.

 

[2001LC]

I had a similar low speed gron. Turned out to be, failing axle needle bearing.

 

[100s]

I had a similar low speed gron. Turned out to be, failing axle needle bearing.

Yeah, I’m wondering if the vibration that clearly telegraphed to that light / fender was a canary in a coal mine for something…

Yeah, I’m wondering if the vibration that clearly telegraphed to that light / fender was a canary in a coal mine for something…

Brand spanking new OEM CV’s btw.

 

[100s]

Driving today, grabbed ahold of the T/C shift lever and when I let off of gas (unload the drivetrain) I have a definite cyclical vibration only felt in the T/C. Trans shifter feels smooth like butter. Frequency increases with speed, I can position the T/C shifter just so (sort of in the middle) and it nearly goes away, but a mm forward or mm back and it is there. I didn't feel it when the rig was in neutral and rolling downhill. Same vibration with T/C locked and in low range.

Just did a T/C drain and refil and I don't recall seeing anything funky in the fluid.

 

[100s]

Driving today, grabbed ahold of the T/C shift lever and when I let off of gas (unload the drivetrain) I have a definite cyclical vibration only felt in the T/C. Trans shifter feels smooth like butter. Frequency increases with speed, I can position the T/C shifter just so (sort of in the middle) and it nearly goes away, but a mm forward or mm back and it is there. I didn't feel it when the rig was in neutral and rolling downhill. Same vibration with T/C locked and in low range.

Just did a T/C drain and refil and I don't recall seeing anything funky in the fluid.

02 is sort of the opposite but less obvious cyclical vibration, mostly when drivetrain is under load. 02 is getting axles today. We’ll see.. I suppose I could start swapping driveline parts.