JPhil
Huh?
When I take a hard turn, like a tight right accelerating around the corner of an intersection, I often get a "gronch" sound from the back. Or taking a tight roundabout at a bit of speed. Usually it is on a right turn, but lately I've heard it on tight left turn too. It sounds exactly like I would think a tire rubbing on fiberglass would sound. It's very short duration, never more than about a second.
It started over a year ago, only very occasionally. Now it is more frequent, maybe 25% of the time.
From my seat it sounds to me like it's coming from the passenger side rear, but perhaps that's just the way it sounds.
I have looked and looked and find no evidence of tire rubbing anywhere---fender, body, spring, T-arm, anywhere. No marks on the tires at all. I thought for a while maybe body movement on old worn out body mounts causing tire contact, but there are no marks anywhere of tire contact!
It occurred to me yesterday, maybe something in the diff or axles? I rebuilt the diff a few years ago, springless, with top quality parts & guidance from Mike Traccdog & Gary GTR1999. It performs flawlessly, no more banging on turns. I run 80W140 Redline synthetic gear oil for positractions and have never had to add a drop.
Dual mount spring, no sway bar. Bilstein shocks, about 7 or 8 years old. Rebuilt T-arms from Van Steel about 4 years old. Balanced axles with good u-joints, 4 years old. Diff cross member reinforcing plates with new rubbers. VBP OEM style calipers, 8 years old. Original rotors, good condition. New heim joint strut rods. Car lowered couple inches.
Tomorrow I will crawl under again and check tolerances for slop in axles and etc. I wouldn't think the stub axles would make this type of noise if the snap ring came off and I know the specs were damn near perfect on all that when I assembled it. It needs alignment, especially after I just replaced the strut rods, but it's not bad and this started before that.
I can't think of anything in the wheel bearings or calipers that would make a noise like that either, but I've been wrong once, no maybe twice, in my life before.
Anybody have any ideas I can check for?
Thanks

It started over a year ago, only very occasionally. Now it is more frequent, maybe 25% of the time.
From my seat it sounds to me like it's coming from the passenger side rear, but perhaps that's just the way it sounds.
I have looked and looked and find no evidence of tire rubbing anywhere---fender, body, spring, T-arm, anywhere. No marks on the tires at all. I thought for a while maybe body movement on old worn out body mounts causing tire contact, but there are no marks anywhere of tire contact!
It occurred to me yesterday, maybe something in the diff or axles? I rebuilt the diff a few years ago, springless, with top quality parts & guidance from Mike Traccdog & Gary GTR1999. It performs flawlessly, no more banging on turns. I run 80W140 Redline synthetic gear oil for positractions and have never had to add a drop.
Dual mount spring, no sway bar. Bilstein shocks, about 7 or 8 years old. Rebuilt T-arms from Van Steel about 4 years old. Balanced axles with good u-joints, 4 years old. Diff cross member reinforcing plates with new rubbers. VBP OEM style calipers, 8 years old. Original rotors, good condition. New heim joint strut rods. Car lowered couple inches.
Tomorrow I will crawl under again and check tolerances for slop in axles and etc. I wouldn't think the stub axles would make this type of noise if the snap ring came off and I know the specs were damn near perfect on all that when I assembled it. It needs alignment, especially after I just replaced the strut rods, but it's not bad and this started before that.
I can't think of anything in the wheel bearings or calipers that would make a noise like that either, but I've been wrong once, no maybe twice, in my life before.
Anybody have any ideas I can check for?
Thanks

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