Knocking sound from rear!

hertahoe · Apr 6, 2021

Whenever I back out/drive into my driveway or going around a corner at low speed. Curb is a rolled curb, I get a knock sound and can't find where it's coming from. I have the 2/3 drop with JM sway bar links, belltech shocks, free travel mod and other suspension is stock. I have gone under and pulled on things but can't produce sound. Checked shocks, sway bars bolts, spare tire is secured, but nothing. Much appreciate the feedback!

2005 Tahoe LT, 4wd, 20" wheels.

Cbncanada · Apr 6, 2021

Is the exhaust system loose or bumping something?

OR VietVet · Apr 6, 2021

Check all u-joints. Track bar. Wheel center caps. The other thing that a lot of people forget about is the axle shaft play side to side where it slips in and is held at the carrier by the c-clip. Check axle bearings as well. If has a locker, RPO code G80, may need fluid changed in the differential.

hertahoe · Apr 9, 2021

Exhaust is solid, no play and don't see where is would be rubbing.

PNW VietVet said:
Check all u-joints. Track bar. Wheel center caps. The other thing that a lot of people forget about is the axle shaft play side to side where it slips in and is held at the carrier by the c-clip. Check axle bearings as well. If has a locker, RPO code G80, may need fluid changed in the differential.

I haven't checked track bar and wanted to replace it when I do control arms. Why would low fluid case a knock sound? Again, another item on the to do list. I did see that the sway bar bushing is under some stress since moving it for the 2/3 drop. The bolts seem to be pointed inwards. Center caps snug.

Rocket Man · Apr 12, 2021

I had that problem and it was a broken weld on one of my DJM end links in the rear. I know you said you have JM but did you mean DJM?

Knocking sound from rear!

hertahoe

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Cbncanada

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OR VietVet

Multnomah Falls

hertahoe

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Rocket Man

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