Driveline Noises

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Joined
Oct 15, 2015
Threads
8
Messages
27
Location
KY
Hi, I have an unlocked 97 LC with 215k on the clock. Everything is stock with the exception of the OME Medium lift and 285 tires. It drives beautifully most of the time. There are 2 issues that I'm feeling/hearing that I'm concerned with and unable to find any hits on the forums. They may not be related.

First is a noise. When I accelerate normally from an intersection, like coming off my road onto a main road, I have the wheels turned (as you would expect) but I hear a noise like the ratcheting you hear when you're on a roller coaster and you start up the hill. Kind of a clanging/ratcheting sound. Not as loud as a roller coaster, but same kind of sound. It goes away as soon as the wheel straighten up. I only really hear it with the windows down. I also only hear it when I accelerate. If I ease out slowly, there is no noise. It's coming from the front and I hear the noise regardless of which direction I'm turning.

The second is a feeling; like a hesitation when I take off from a stop. I can only describe it like there is play in driveline somewhere. It doesn't make any noise at all - it's just a feeling, like something needs to engage when I take off. A caveat is that it only happens if I take of normally by applying gas. If I take off slowly, like in traffic where I just kind of coast to the next light, I don't feel it. But as soon as I give if some gas, the "play" is there. I can't tell if it is coming from the front or rear.

Trying to narrow this down, i've jacked up the front axle and checked the wheels. They turn as they should and I do not hear any noises. If I turn a wheel forwards, the other turns backwards as it should and it's quiet as a mouse. There does not seem to be excessive play in the front driveline. All the u-joints are solid and greased. Same for the rear. I've greased the slip joints and they seem to be solid as well.

I've tried checking the motor mounts and there doesn't seem to be much play in them. The transfer case stick doesn't move more than 1/2 - 3/4 of an inch during acceleration.

Sorry for the long post. Just trying to give as much info as possible.

I'm at a loss. Any ideas?

Thanks.
 
The first problem sounds like a dry and/or worn birfield joint inside the steering knuckle, which will probably require a rebuild. I'm not sure on the second one at this point.
 
The first problem sounds like a dry and/or worn birfield joint inside the steering knuckle, which will probably require a rebuild. I'm not sure on the second one at this point.

I rebuilt the birfield joints last fall. I think they're still in good shape. No leaks or seepage on the housing, though I should probably check the grease level somehow.
 
I would check the drive flanges on both front wheels for stripped splines.
 
These are pretty much two of the most common "issues". Both are most of the time fixed with some extra grease. If the grease doens't fix it, then you'll need new parts. First one, get Moly grease and stick in a ziplock. Cut a small corner off the ziplock and use it to squeeze grease into the knuckle. (Square plug). You can roughly get the level by using a ziptie or something to stick in there. Should be about halfway full. If that doesn't help then people just swap birfields (one side to the other) and are good.

Second one sound like dry or worn rear u-joint on the rear driveshaft. Pump it with lots of tacky grease (red) and see if that helps.
 
These are pretty much two of the most common "issues". Both are most of the time fixed with some extra grease. If the grease doens't fix it, then you'll need new parts. First one, get Moly grease and stick in a ziplock. Cut a small corner off the ziplock and use it to squeeze grease into the knuckle. (Square plug). You can roughly get the level by using a ziptie or something to stick in there. Should be about halfway full. If that doesn't help then people just swap birfields (one side to the other) and are good.

Second one sound like dry or worn rear u-joint on the rear driveshaft. Pump it with lots of tacky grease (red) and see if that helps.


Thanks a lot. I'll check those this weekend.
 
Do you get the ratcheting noise if you pull away with the wheels pointing straight ahead? If no and you do when turned then Birfs it is, the flanges do not give a toss which way they are pointing when they fail. Birfs on the other hand do.

regards

Dave
 
Do you get the ratcheting noise if you pull away with the wheels pointing straight ahead? If no and you do when turned then Birfs it is, the flanges do not give a toss which way they are pointing when they fail. Birfs on the other hand do.

regards

Dave

That makes sense. And yes I only hear the noise when I turn and pull away. I have a feeling that they have been abused. When I repacked everything last fall I noticed that there were discolorations on the outside of the birf - like heat marks that match up with each of the 6 balls. I'll try adding grease. I put one full tube in each side, but didn't check the level afterwards. Maybe that wan't enough.

Thanks a lot for the help. I appreciate it.
 
First the burn marks are the norm, usually caused by the machining process. 1 tube is not enough I am afraid. If they have been clattering then the case hardening may already be done for? Go to a Land Rover dealer (yeh I know, but dark glasses and a hat pulled down has worked for me), and ask the guy for FOUR tubes of 'ONE SHOT' grease for CV joints.

This is a fairly sloppy version of Moly grease, undo the square headed bolt towards the front of the knuckle housing, empty two tubes in each and go for a drive, hopefully that will quieten them down.

regards

Dave
 
Watching this. I've got a similar noise that I think the o/p described. Best reproduced in the parking lot. Turning hard right from a stopped position with brakes applied, then gas on and ease out of the brakes. Clunkety clunkety clunk. I will be trying the grease monkey fix while researching the Birfields. Thanks all.
 
Update: I added some more grease to the birfs and the noise is gone. Glad it was something easy. I didn't get the "One Shot" grease, but I did get some NLGI 0 grease instead of the usual NLGI 2, so it flowed a little better.

I still have the other "hesitation", but I think I can track it down, it's only a matter of having the time. Greasing the drive shafts did not help. There is no play in either front or rear.

Thanks for the help guys. Really appreciate it.
 
Gents - looking for thoughts on noises that seem to come from the T-Case following a lift a few months ago. Lift went on, caster corrected with new Slee front control arms. Rig is running great but seem to get a grinding or slipping from my T-case AFTER acceleration. So basically what happens is while I am accelerating everything is fine but once I let off the gas I seem to get this slipping/grinding sound. I've greased both shafts but don't want to put in too much grease. This sound does not happen when I'm under about 30mph or when I am in low range. '97 1FZFE 40th Anny, unlocked, 3"+ inch lift and 33s.

Also, I get some play in the drive shafts when I turn them by hand. How much is normal?

Thanks.
 

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