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#1 |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Wobble in the suspension
When I got my truck it had a wobble when driving down the road. Not all the time but at certain speeds. The rear suspension was done first, new TA bushings, 4 inch springs, shocks relocated and new shocks. Still had the wobble. Next I rebuilt the front end. New 2.5 inch spindles, 2 inch springs, shorter shocks, new tie rod ends, ball joints, properly mounted PS box, draglink, idler arm, CA shafts, rotors and calipers. everything was replaced. I put on junkyard wheels and tires and still had the wobble. I thought it was the tires being out of balance. Yesterday I put on my brand new rally wheels with new tires. Still have the wobble. The only issue I didn't get to that I noticed was the radiator support is missing one bolt and the other isn't bolted to the frame. I don't think that is the issue though. This drives me nuts after spending so much time and money rebuilding all of the suspension and steering. It feels like a tire seriously out of balance but it felt the same with the junk tires and it's exactly the same with the new tires and wheels. The new ones were installed at a reputable shop o I know they are balanced.
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66 shorty ![]() |
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#2 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: Wobble in the suspension
does it have a 2 piece d/shaft? centre support
ron |
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#3 |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Wobble in the suspension
Nope one piece.
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#4 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: Wobble in the suspension
have you checked your firing order or the nut behind the steering wheel. you are running out of options. was the d/shaft shortened and ends out of sync. is there damage to the driveshaft. ujoints and are all of the motor and trans mounts good!!!!!!
ron |
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#5 |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Wobble in the suspension
I think it's something in the front end. It's a good wobble instead of a vibration from the driveshaft. It does have new u joints. I think I will check the mounts and maybe see if a rivet broke somewhere on the frame. It wobbles so bad at some speeds that the hood shakes back and forth. I'm also going to take it to a classic car restoration shop down the road and see if he will put it up on the lift and take a look. I'll have to take him for ride but he might be able to figure it out.
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66 shorty ![]() |
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#6 |
Registered User
Join Date: Feb 2008
Location: Sidney,b.c.
Posts: 4,425
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Re: Wobble in the suspension
they are silly little questions, but when you are lost you have to think. there are lots of things that can cause it and it magnifies for some reason or other. there is always an answer for it .
did the wobble start before or after the ujoints were installed. there could have been a needle dropped and the joint forced together to put the locks in. that could do it ron |
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#7 |
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Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,261
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Re: Wobble in the suspension
You might be surprised how much resonance sheet metal can transfer if it is not secured. I would make sure the radiator support is mounted with new hardware and isolators (both sides) and then take it for a test drive. If it still wobbles, I would confirm a front and rear wheel alignment. I hope you find the issue soon.
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes |
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#8 |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Wobble in the suspension
It was there when I got the truck. Same wobble after all the work has been done.
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#9 |
Senior Member
![]() Join Date: May 2007
Location: Doodah Kansas
Posts: 7,773
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Re: Wobble in the suspension
hmm.
motor mounts? is it only at a certain speed? look at your upper arms too, if memory serves someone had a strange alignment problem a while ago and found out they had switched the upper arms side to side, leading to a weird caster setting. other than that I am stumped.
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#10 |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Wobble in the suspension
I did have a front end alignment after I got everything put back together. And the upper arms are correct. I have a new bushing, bolt kit for the rad support so that is next.
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#11 |
Senior Member
![]() Join Date: Jan 2012
Location: Great bend,ks
Posts: 230
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Re: Wobble in the suspension
Have you ever jacked up rear suspension and check for bent axle"s.put jack stand"s under differential and let engine idle in gear and see if drum"s run straight and axle"s and wheel"s also.if you don"t see anything run the engine at a faster speed up to about where you noticed the vibration when driving on the road, and see if you feel any vibration .Be sure you have a jack stand under each side of differential when you do this.
Last edited by 1966shortwide; 02-27-2015 at 12:14 AM. |
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#12 |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
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Re: Wobble in the suspension
The only thing that comes to mind for me also is possibly a bent axle flange.
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#13 |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Wobble in the suspension
Another thing to look for . Thanx John!
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#14 |
Registered User
Join Date: Aug 2013
Location: sumterville, florida
Posts: 914
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Re: Wobble in the suspension
first part is communication as the goal here is to diagnose by airwaves without inspecting or spending any seat time in the vehicle.
describe what you call a wobble does the steering wheel oscillate (rapidly) left/right? or is it more like a vibration (bounce)? if it's more like a vibration do you feel it more in the seat or steering wheel? what speeds does it come in at and is it consistent with the speed? does it go away, or lessen, with more or less speed? does it take something to set if off like hitting a bump in the road? or is it more like a handling problem where you are fighting the steering wheel? things to consider: typically things like worn bushings, bad ball joints, etc do not cause a wobble or vibration. they could accentuate it. i've had many vehicles come to the shop with front ends extremely worn but they drove normal. alignment is never a factor in any kind of "wobble" or vibration. if it is truly a "wobble" the majority of the times, in my experience, it was tire related. bent axle is a consideration but should be consistant |
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#15 | |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Wobble in the suspension
Quote:
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#16 |
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Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,261
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Re: Wobble in the suspension
…but, confirming a front to rear alignment will help spot any issues with bent wheels, axles, etc. in the rear.
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes |
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#17 |
Registered User
Join Date: Aug 2013
Location: sumterville, florida
Posts: 914
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Re: Wobble in the suspension
after the alignment heads are attached they are compensated for any run out in the wheel, axle or attaching mechanism so unless it is grossly bent it will not be noticed and will not show up on an alignment
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#18 |
It's Better With Nitro
Join Date: Apr 2008
Location: Chino Hills, CA
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Re: Wobble in the suspension
I'll be sure not to use the shop you go to for alignment. When a customer comes in complaining about a wobble, darting, wandering, pulling right or left, etc., we take it for a drive with the customer to identify the issue. We put it on the rack and do a complete inspection as part of the alignment process. Then do a test drive after to make sure the issue is resolved. Just doing a static alignment without experiencing or addressing the customer's issue does little to fix any problems and is bad customer service.
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes |
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#19 | |
Registered User
Join Date: Aug 2013
Location: sumterville, florida
Posts: 914
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Re: Wobble in the suspension
Quote:
i wasn't trying to step on your great customer service toes. |
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#20 |
Registered User
Join Date: Apr 2014
Location: Rochester, MI
Posts: 206
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Re: Wobble in the suspension
Please don't leave us hanging if you solve problem. Some thoughts for consideration are drum and wheel weight distribution and I'm not referring to wheel weights for balancing a tire. One of my wheel studs had a yellow dab of paint on it. I read somewhere that this old school marking was for positioning the wheel based on the valve stem opening. Don't laugh, not my idea.
Also, worn slip yokes may affect spin of drive shaft. Im going to look at mine when weather warms. I see recommendation for packing yokes with grease to help clunking (temporary fix). Just wondering if this would also affect smoothness of driveline??? Good luck and don't forget to update. |
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#21 |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Wobble in the suspension
I'm going to drive it to work Sunday and see what MPH it wobbles. If it's light enough I might try to get a video. It's not the drive line, it has a one piece. It wobbled the same before I swapped out the brakes and suspension so I'm leaning towards rear axles or wheels. I hope to have the axles swapped out for new 5 luggers next week and of course I will have to get the new wheels and tires on also. If that doesn't work I will put in the new rad. support bolts and start checking the rivets and motor mounts. I'm also going to put on a front sway bar soon. That will either help or make it worse so we'll see.
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#22 |
Registered User
Join Date: Aug 2011
Location: Shepherd, Texas
Posts: 83
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Re: Wobble in the suspension
My 65 used to have a severe shimmy if you hit a bump at about 45 mph. It would shake so hard it was scary. If you sped up or slowed down it would stop. I checked everything I could think of but couldn't figure it out. When my bias ply tires wore out I decided to put radial tires on it and for whatever reason it stopped. That was back in the eighties and when I took it off the road in 2009 it was still ok.
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#23 | |
60-66 Nut
![]() ![]() Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
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Re: Wobble in the suspension
This reminded me of something else and it doesn't apply to just bias ply tires. I have seen radial tires do some weird things when the plies start to separate. You might take a good look at your rear tires, since you said you have changed the fronts a couple times.
Quote:
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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#24 | |
Registered User
Join Date: Aug 2012
Location: Rathdrum ID
Posts: 1,128
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Re: Wobble in the suspension
Quote:
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#25 |
Registered User
Join Date: Sep 2012
Location: Leander, TX
Posts: 969
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Re: Wobble in the suspension
My 79 Caprice had a wobble and I found it during a chassis dyno run. It only occurred in 3rd gear at high speed. So when they were doing the dyno I had them do a pull in second gear to avoid the wobble but it was to short of a run to get any data. So they tried a 3rd gear pull and one of the techs noticed the right rear wheel was off. We swapped for a front wheel and the wobble went away on the chassis dyno. So I had to buy a new wheel and that one became the spare wheel. Once it was on the chassis dyno it was very easy to see one of the rear wheels was bent. Not even sure how it got bent. As I bought them brand new.
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