Odd knocking noise
Thread Starter
Senior Member

Joined: Feb 2010
Posts: 695
Likes: 11
From: Oregon
Car: 1991 Z28
Engine: L31-R 350 w/ EBL P4
Transmission: 700R4
Axle/Gears: 2.73
Odd knocking noise
Whenever I turn my wheels while stopped or while at low speed, while going over a speed bump, or while going around a turn quickly the front of my car makes a knocking noise. It sounds almost like metal bending or a shock that's bad? I have no idea what it is though.
Supreme Member
Joined: Jan 2009
Posts: 1,126
Likes: 0
From: Columbus Ohio
Car: 91 Z28,64ImpalaSS4094spd,67 Galaxy
Engine: Dart 415Profiler hd,cmprlrs,Hlly750
Transmission: Built 700R4, 3200 stall
Axle/Gears: 3:89 Moser 9"
Re: Odd knocking noise
Get the car up in the air and do a close inspection of parts, get a prybar, check the ball joints, springs, shocks, etc. I would also check the frame rails closely especially the area around the steering box. Lookup threads on the Wonderbar and steering box fixes. This a problem area on our cars.
Thread Starter
Senior Member

Joined: Feb 2010
Posts: 695
Likes: 11
From: Oregon
Car: 1991 Z28
Engine: L31-R 350 w/ EBL P4
Transmission: 700R4
Axle/Gears: 2.73
Re: Odd knocking noise
Ok I'll take a look under there soon. What is a good wonderbar to get? And how hard are they to install?
Supreme Member
iTrader: (20)
Joined: Aug 2007
Posts: 1,111
Likes: 1
From: chicago
Car: 87 GTA
Engine: 385 sbc
Transmission: 700r4
Axle/Gears: 2.73 posi
Re: Odd knocking noise
You can find them on here time to time for around $40, real easy to install
this forum. Also check your upper strut mounts, and spindle bolts
this forum. Also check your upper strut mounts, and spindle bolts Thread Starter
Senior Member

Joined: Feb 2010
Posts: 695
Likes: 11
From: Oregon
Car: 1991 Z28
Engine: L31-R 350 w/ EBL P4
Transmission: 700R4
Axle/Gears: 2.73
Re: Odd knocking noise
Well I ordered a TDS wonderbar and when I went to install it, BEHOLD. There is already one there. So I guess I'm returning this wonderbar lol
Thread Starter
Senior Member

Joined: Feb 2010
Posts: 695
Likes: 11
From: Oregon
Car: 1991 Z28
Engine: L31-R 350 w/ EBL P4
Transmission: 700R4
Axle/Gears: 2.73
Re: Odd knocking noise
Ok update on this...
Wonderbar was already installed so that gets rid of that. A week ago I replaced two ball joints and a tie arm that was bad on the steering system (according to les shwab after an alignment appointment). Also checked the struts and they seem fine, they don't bounce more then once under pressure, and they come back to rest quickly.
And the car still makes noises when turn the wheel or going over bumps. When going over small washboard bumps it sounds like something is loose and about to fall off the car, but I can find nothing loose on the front end. Its really stumping me.
Wonderbar was already installed so that gets rid of that. A week ago I replaced two ball joints and a tie arm that was bad on the steering system (according to les shwab after an alignment appointment). Also checked the struts and they seem fine, they don't bounce more then once under pressure, and they come back to rest quickly.
And the car still makes noises when turn the wheel or going over bumps. When going over small washboard bumps it sounds like something is loose and about to fall off the car, but I can find nothing loose on the front end. Its really stumping me.
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