I had KOs on my '96 Cherokee and KO2s on my Jeep CJ7. I will never buy them again. Had vibrations and kept taking them to different tire shops to get them balanced correctly but none could resolve it. Was very frustrating. I finally got new tires, Milestar Patagonia MT02, and all of my problems went away.
Pulsing/droning vibration at highway speeds
- Thread starter marcfj60
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I had KOs on my '96 Cherokee and KO2s on my Jeep CJ7. I will never buy them again. Had vibrations and kept taking them to different tire shops to get them balanced correctly but none could resolve it. Was very frustrating. I finally got new tires, Milestar Patagonia MT02, and all of my problems went away.
Hey all, thanks for the responses!
Yeah, that is a great post that @abuck99 made there. According to that it should be axle or U-joint related. While I've got brand new OEM driveshafts + OEM CVs in, I haven't done the diffs or TC themselves. The reason I keep coming back to driveshafts is just that it feels so speed related.
Yeah, I've done the rear TC pinon bearing a few posts back. The one I took out was fine. I put in a new one anyway. I was wondering about the input pinon bearing into the rear diff. I see a few 60 and 80 series folks have done it, but don't recall seeing any 100 series people having issues. But still a good call out about them potentially being more sensitive to angles if they are going out.
All OEM for everything. I even bought two different OEM rear driveshafts. Maybe I should try a third? haha. No spacers either. I really am super boring bone stock.
The flex plate one is new to me. Just did a search and see it happens but is rare. I might have to look into this one more.
Yeah, I should try a different set of tires. I've got a buddy close by with a set that I could try with. The only reason I haven't is just because when I take out the rear driveshaft and lock the center diff, it is very smooth on the highway. No vibes. That is why I keep focusing on that area so much.
@abuck99 , I read with great interest this thread that you were active in 8 years ago. Many of the things in that thread sound very similar to what I'm dealing with. The only issue is again, I'm bone stock. So in theory, pinon angle issues really shouldn't apply to me.
I adjusted the AHC sensors a bit to bring the rear down (even though I know you are supposed to have a rake). The slightly changed the rear pinon a bit. Seems to be around 0.0%. I might be having wishful thinking again, but this might have helped? Just like @LJE has said, part of the issue is that it is often variable. One day it isn't too bad and other days it is worse.
I'm tempted to install some washers on the transmission support cross brace to bring down the TC angle a bit. Just to see what that might do.
Yeah, that is a great post that @abuck99 made there. According to that it should be axle or U-joint related. While I've got brand new OEM driveshafts + OEM CVs in, I haven't done the diffs or TC themselves. The reason I keep coming back to driveshafts is just that it feels so speed related.
Yeah, I've done the rear TC pinon bearing a few posts back. The one I took out was fine. I put in a new one anyway. I was wondering about the input pinon bearing into the rear diff. I see a few 60 and 80 series folks have done it, but don't recall seeing any 100 series people having issues. But still a good call out about them potentially being more sensitive to angles if they are going out.
All OEM for everything. I even bought two different OEM rear driveshafts. Maybe I should try a third? haha. No spacers either. I really am super boring bone stock.
The flex plate one is new to me. Just did a search and see it happens but is rare. I might have to look into this one more.
FYI installing a set of mud terrain tires fixes (drowns out) most of the perceived noise and vibration issues - (lol)
Yeah, I should try a different set of tires. I've got a buddy close by with a set that I could try with. The only reason I haven't is just because when I take out the rear driveshaft and lock the center diff, it is very smooth on the highway. No vibes. That is why I keep focusing on that area so much.
@abuck99 , I read with great interest this thread that you were active in 8 years ago. Many of the things in that thread sound very similar to what I'm dealing with. The only issue is again, I'm bone stock. So in theory, pinon angle issues really shouldn't apply to me.
I adjusted the AHC sensors a bit to bring the rear down (even though I know you are supposed to have a rake). The slightly changed the rear pinon a bit. Seems to be around 0.0%. I might be having wishful thinking again, but this might have helped? Just like @LJE has said, part of the issue is that it is often variable. One day it isn't too bad and other days it is worse.
I'm tempted to install some washers on the transmission support cross brace to bring down the TC angle a bit. Just to see what that might do.
Don’t mess with the TC mount- you might create a problem where there isn’t one.Hey all, thanks for the responses!
Yeah, that is a great post that @abuck99 made there. According to that it should be axle or U-joint related. While I've got brand new OEM driveshafts + OEM CVs in, I haven't done the diffs or TC themselves. The reason I keep coming back to driveshafts is just that it feels so speed related.
Yeah, I've done the rear TC pinon bearing a few posts back. The one I took out was fine. I put in a new one anyway. I was wondering about the input pinon bearing into the rear diff. I see a few 60 and 80 series folks have done it, but don't recall seeing any 100 series people having issues. But still a good call out about them potentially being more sensitive to angles if they are going out.
All OEM for everything. I even bought two different OEM rear driveshafts. Maybe I should try a third? haha. No spacers either. I really am super boring bone stock.
The flex plate one is new to me. Just did a search and see it happens but is rare. I might have to look into this one more.
Yeah, I should try a different set of tires. I've got a buddy close by with a set that I could try with. The only reason I haven't is just because when I take out the rear driveshaft and lock the center diff, it is very smooth on the highway. No vibes. That is why I keep focusing on that area so much.
@abuck99 , I read with great interest this thread that you were active in 8 years ago. Many of the things in that thread sound very similar to what I'm dealing with. The only issue is again, I'm bone stock. So in theory, pinon angle issues really shouldn't apply to me.
I adjusted the AHC sensors a bit to bring the rear down (even though I know you are supposed to have a rake). The slightly changed the rear pinon a bit. Seems to be around 0.0%. I might be having wishful thinking again, but this might have helped? Just like @LJE has said, part of the issue is that it is often variable. One day it isn't too bad and other days it is worse.
I'm tempted to install some washers on the transmission support cross brace to bring down the TC angle a bit. Just to see what that might do.
You practically a new driveline- and operating angles are well with in the acceptable range. $2k more for a decent set of AT tires and your noises will be mitigated.
I’ve been following this, as I sorted out the same type of issue with my 100. I rebuilt my driveshafts, and the problem was solved.
I know this may be a stupid question, and may have already been addressed…. but I have to ask as I’ve been through this before with another non-Toyota vehicle. Has this one been in an accident, or any other situation that might have tweaked the frame?
I know this may be a stupid question, and may have already been addressed…. but I have to ask as I’ve been through this before with another non-Toyota vehicle. Has this one been in an accident, or any other situation that might have tweaked the frame?
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