Front end help?

[Mike Taylor 3601]

I have named this "death wobble" on my G body malibu,first happened at northern class nationals,when cross finish line shove clutch in and knock out of gear,then front end start shaking so bad can't hold on to steering wheel,brakes make it worse, I tried man handling steer wheel,that didn't go good,tried stabbing brakes,tried lightly braking, nothing helps,except when speed get down to probaly 25-30 mph it quits,
Found out yesterday that speed doesn't start it,1st round of bracket yesterday at doorslammers I flickered the stage bulb and was red when tree started,so just drove down track maybe 45- 50 mph @ finish line and let off throttle and it went in to wobble?
I don't know if is shocks bad, something out of line,have to fix, it shakes so hard,I am going to check if not replace all front end components,it gets so violent I'm scared could have damaged something

One thing confuses me is it doesn't do it everytime.

Mike Taylor 3601

[Billy Nees]

Either you've got a lot of looseness somewhere or you need a lot more + caster.

[Mike Taylor 3601]

I'm leaning toward looseness also, didn't change any thing just started happening and doesn't always do it. Going to tear into tonight hopefully and find the problem.
Thanks for your input Billy
Mike Taylor 3601

[Mike Pearson]

Check the bump steer. My car was doing that when the bump steer was out of whack and toeing out when the front end dropped under deceleration. Also look at the slop in the steering box. You need to have that pretty tight

[tj310]

You should have around 5 degrees positive caster ---Trevor

[Mike Taylor 3601]

Thanks for replies,
Everything worked good,for years,then something happened to start the problem.
Took front apart, and found several possibilities, lower a arms had a lot of looseness, has solid bushings,which should of had 1/2 bolts and I used the original metric bolts,have to drill holes in frame for 1/2 bolt to go through,worked for a long time then must of started moving, steer shaft between steering box and column has some slack and center link at idler arm has some looseness and drivers front wheel bearing had some movement.
Hopefully one or combination of these are causing the problem,or did the problem cause the looseness?
Going to remove anything left on car that has to do with steering and check over,and magnaflux anything I can and can't mag it may throw away and replace.
Shake was so violent scared of having something damaged that will break later,so not taking any chances
Mike Taylor 3601

[Eman]

Don't know about g bodies but on f bodies with struts and stock steering you need a steering stabilizer. Mine death wobbled badly when the wheels touched down. installed Quay stabilizer and bump steer kit.

[Mike Taylor 3601]

Think once I get everything tightened up will be OK, car drove great for long time then started shaking in shutdown, did'nt do everywhere, never has done it at Bowling Green or London running 1/4 at both,did almost every pass at Columbus and Ohio Valley,I have problem but track seems to make difference, hopefully get to test next friday
Mike Taylor 3601