Driveshaft clanking sound: Video (1 Viewer)

[FJ Rock]

Does anyone know what this sound is? Seems like the driveshaft is bouncing all around. Will occur with or w/o clutch engaged. It’s annoying and scares the hell out of people leaving Publix lol

Video link.

Video Jul 09, 5 02 12 PM.mov

Shared with Dropbox

www.dropbox.com

 

[B y r o n]

I'd take a look at ALL your u-joints or what may be left of them.

 

[Steamer]

Get under there and start yanking on the drive shaft at each end. With that much racket you should be able to find some slop somewhere under there. I take it you are in 2wd and the front hubs unlocked so the front drive shaft is not moving.

 

[igotta40]

Yes. That is the sound money makes when it leaves your wallet.

 

[FJ Rock]

I'd take a look at ALL your u-joints or what may be left of them.

Looks good

 

[FJ Rock]

Get under there and start yanking on the drive shaft at each end. With that much racket you should be able to find some slop somewhere under there. I take it you are in 2wd and the front hubs unlocked so the front drive shaft is not moving.

Yes, I’m in 2 high. Front driveshaft isn’t moving. Sounds more like it’s coming from the rear

 

[FJ Rock]

I'd take a look at ALL your u-joints or what may be left of them.

Everything looks good. I’m going to see if I can get a camera below to see what’s clattering

 

[JDNs78FJ40]

Have you ever separated the rear driveshaft? Maybe it is out of phase?

 

[Steamer]

Maybe put the rear axle on jack stands and observe it running in gear since it occurs with no load on it.

 

[B y r o n]

Everything looks good. I’m going to see if I can get a camera below to see what’s clattering

You say it looks good but did you actually lay your hands on them and feel for bad joints?

 

[Engineer8000]

loose pinion nut

 

[76 PTO]

Do you have a locker in the rear? Mine will do that when the locker does not unlock in a slow corner.

 

[FJ Rock]

loose pinion nut

 

[FJ Rock]

Does anyone know what this sound is? Seems like the driveshaft is bouncing all around. Will occur with or w/o clutch engaged. It’s annoying and scares the hell out of people leaving Publix lol

Video link.

Video Jul 09, 5 02 12 PM.mov

Shared with Dropbox

www.dropbox.com

Thank you everyone for the questions.

I did what I could but didn’t notice anything obvious. I took it into to a local shop to look at my steering and they think it maybe bearings in the 3rd member. I ordered a bearing kit and also bought a used 3rd member just if it’s torn to shreds after breaking it down.

Now I’m narrowing in driveline shops in ATL to do a rebuild. I may go to one that one that I took my old FJ60. Also it’s pissing oil out of what looks like the rear main seal area.

Or do I crack this thing open and pray that I can read a manual and read manual? I can’t wait to get this 40 on the road regularly.

 

[airon23]

Any chance it could be something loose in the ebrake assembly? Sort of sounds more 3rd member though I agree, didn't seem like you were moving much for the drive line to be the issue.

 

[S.CarolinaFZJ80]

@FJ Rock

Did you ever figure out what the problem was?