Hey all. Been searching like crazy trying to track down a noise on my 98 TJ, 4.0, 5 speed, Dana 35 rear, 62k miles. Lifted 2.5" currently with no TC drop nor SYE, but no vibrations as far as I can tell.
The sound I'm experiencing starts to become noticeable when accelerating past 20-25 mph, and continues to increase in frequency as I go faster. It's almost a rhythmic "whirl" or scraping sound that is consistent. It appears to be worse when accelerating or at steady speed above 20-30 mph, but is also still present when coasting to a stop...but the frequency of the noise decreases (not necessarily the intensity). I've read many threads and listened to others videos on angry sparrows and loud rear pinion bearings, but this seems different. Here's what I've tried or so far:
-swapped wheels/tires, no change.
-disconnected front drive shaft, no change.
-sprayed WD-40 at all u joints on driveshafts with no change (just to see if it made a difference lol)
-braking doesn't change sound
-rear yoke seems tight enough
-front and rear diff fluids changed
I'll try to take a video later for the sound, but I'm confused because it doesn't seem consistent with what I've read on the forums. Disconnecting the front DS should have eliminated the front end as the issue, right? Aside from possible wheel bearings I guess...but sound appears to be coming from the rear?
What other things should I be looking for? If my driveline angle is off, could it cause such a sound? Maybe I should try dropping the TC 1/2"-1"?
Thanks!
The sound I'm experiencing starts to become noticeable when accelerating past 20-25 mph, and continues to increase in frequency as I go faster. It's almost a rhythmic "whirl" or scraping sound that is consistent. It appears to be worse when accelerating or at steady speed above 20-30 mph, but is also still present when coasting to a stop...but the frequency of the noise decreases (not necessarily the intensity). I've read many threads and listened to others videos on angry sparrows and loud rear pinion bearings, but this seems different. Here's what I've tried or so far:
-swapped wheels/tires, no change.
-disconnected front drive shaft, no change.
-sprayed WD-40 at all u joints on driveshafts with no change (just to see if it made a difference lol)
-braking doesn't change sound
-rear yoke seems tight enough
-front and rear diff fluids changed
I'll try to take a video later for the sound, but I'm confused because it doesn't seem consistent with what I've read on the forums. Disconnecting the front DS should have eliminated the front end as the issue, right? Aside from possible wheel bearings I guess...but sound appears to be coming from the rear?
What other things should I be looking for? If my driveline angle is off, could it cause such a sound? Maybe I should try dropping the TC 1/2"-1"?
Thanks!