lilredwagn
NAXJA Forum User
- Location
- South Carolina
The howling is me, dropping the driveshaft flange first on my forehead, but chicks dig scars, and being open-minded about it, I suppose I'm fortunate it didn't take my eye out.
Anyway, I have a howling from the jeep, comes on about 20mph, strongest at 35mph, and by 65 it's stopped making noise and just vibrates. It increases with wheelspeed, but doesn't change pitch. I timed it, and the frequency seems to be close to, if not the same as, axle rotation.
Last fall I removed my front DS because of an incident that involved me running the NP231 dry for probably 1-2k miles. (The rear seal tore, and the spinning DS was flinging all the fluid out. Quick fix was pull front DS) I rebuilt the DS, but I never put it back in, as I wasn't happy with the feel of the joints. I intended to take it to a driveline shop at some point, but got involved in other things, so it has just sat around for awhile.
For S&G, I replaced all 3 u-joints in the rear RE driveshaft.
D30 front, 8.25 rear, and TC still have a full fill of clean Mobil1 from last fall.
I had someone drive it while I crawled around the interior listening for where it was coming from. I believed it to be coming from the passenger side. First I thought the right rear, but when I put my ear to the fenderwell, I decided that wasn't it. I tried the passenger footwell, and although it wasn't obvious it was the source, it seemed to be the best bet, so i replaced the FR hub assembly - which achieved nothing but emptying my wallet of $120.
There is no obvious play (other than gear play) in the yoke at either differential, or at either end of the TC.
I put the jeep up on jackstands, and with the rear in the air, the howling noise does not reproduce.
I did, however, notice a ticking noise from the TC, that seems to be coming from the input/planetary region (not the chain).
I discoed the rear DS, hooked up the front DS, put it into 4wd, gave it some gas and got all sorts of ugly vibrations and noises. I didn't get under it to find the source because it sounded and felt bad enough that I didn't feel comfortable under a couple jackstands.
At this point, I can change out the rear axle bearings just to see what happens.
That would leave the carrier bearings, which I don't want to touch, because I need to drive this jeep to NY on Thursday, so I have no spare time for learning as I go. If it is the carrier bearings, my only practical option would be to find a shop or drive it as is.
The other possibility is the TC. Since it was run dry, and seems to have something up with the front end (maybe I fawked the oil pump on the last install?), that's the first place I would suspect a problem. Additionally, it would explain being unable to locate the noise.
However, I can't figure why the howling would "pulse" at about wheelspeed if it was the TC. Does anyone know of a plausible explanation that would explain that? Because at this point, I'd really like the TC to be the problem, but I don't have the time to do the TC *and* the diffs.
Thanks for any suggestions!
Anyway, I have a howling from the jeep, comes on about 20mph, strongest at 35mph, and by 65 it's stopped making noise and just vibrates. It increases with wheelspeed, but doesn't change pitch. I timed it, and the frequency seems to be close to, if not the same as, axle rotation.
Last fall I removed my front DS because of an incident that involved me running the NP231 dry for probably 1-2k miles. (The rear seal tore, and the spinning DS was flinging all the fluid out. Quick fix was pull front DS) I rebuilt the DS, but I never put it back in, as I wasn't happy with the feel of the joints. I intended to take it to a driveline shop at some point, but got involved in other things, so it has just sat around for awhile.
For S&G, I replaced all 3 u-joints in the rear RE driveshaft.
D30 front, 8.25 rear, and TC still have a full fill of clean Mobil1 from last fall.
I had someone drive it while I crawled around the interior listening for where it was coming from. I believed it to be coming from the passenger side. First I thought the right rear, but when I put my ear to the fenderwell, I decided that wasn't it. I tried the passenger footwell, and although it wasn't obvious it was the source, it seemed to be the best bet, so i replaced the FR hub assembly - which achieved nothing but emptying my wallet of $120.
There is no obvious play (other than gear play) in the yoke at either differential, or at either end of the TC.
I put the jeep up on jackstands, and with the rear in the air, the howling noise does not reproduce.
I did, however, notice a ticking noise from the TC, that seems to be coming from the input/planetary region (not the chain).
I discoed the rear DS, hooked up the front DS, put it into 4wd, gave it some gas and got all sorts of ugly vibrations and noises. I didn't get under it to find the source because it sounded and felt bad enough that I didn't feel comfortable under a couple jackstands.
At this point, I can change out the rear axle bearings just to see what happens.
That would leave the carrier bearings, which I don't want to touch, because I need to drive this jeep to NY on Thursday, so I have no spare time for learning as I go. If it is the carrier bearings, my only practical option would be to find a shop or drive it as is.
The other possibility is the TC. Since it was run dry, and seems to have something up with the front end (maybe I fawked the oil pump on the last install?), that's the first place I would suspect a problem. Additionally, it would explain being unable to locate the noise.
However, I can't figure why the howling would "pulse" at about wheelspeed if it was the TC. Does anyone know of a plausible explanation that would explain that? Because at this point, I'd really like the TC to be the problem, but I don't have the time to do the TC *and* the diffs.
Thanks for any suggestions!
