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#1288685 Sun Nov 25 2018 11:05 AM
Joined: Jan 2009
Posts: 246
S
Shop Shark
Well I took my 53 Chevy truck for a test ride it drove good but I notice that it had some bump steer not a lot but how do I fix that ? I did lower the truck in the front and back not a extreme drop .Everything has been rebuilt in the front end and new tires . It has not had an alignment yet .

sal moreno #1288686 Sun Nov 25 2018 11:34 AM
Joined: Feb 2016
Posts: 706
7
'Bolter
Alignment will certainly play a big part, small issues are multiplied if caster, camber and or toe are not within spec. Depending on the extent of your modifications you might have to play with adjustments until it handles well.


1957 Chevrolet 5700 LCF 283 SM420 single speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
78buckshot #1288689 Sun Nov 25 2018 11:56 AM
Joined: Jan 2009
Posts: 246
S
Shop Shark
Ok Thxs . Yeah it has not gone in for a full alignment so it needs one for sure I hope it will help . I just took out a a few springs in the back and did the double spring in the front 3 inch drop in the front and 5 in the back .

sal moreno #1288693 Sun Nov 25 2018 02:46 PM
Joined: Feb 2000
Posts: 4,528
J
'Bolter
I suspect it needs more caster, it probably had 2 degree shims in it when new, 4 degree should help. Just watch out for thick shims or short center pins on the leaf springs, the center pin needs to pass through the shim and still locate in the axle center hole. I have seen some shims with a center hole and pin combination so the length of the spring pin is not a concern.

If the steering feels loose, or easy to turn, then it needs more caster. More caster is like adding weight to the front. You can tell a vehicle has a lot of caster when the front end rises and drops when going from full stop to stop with the steering wheel. With no or very little caster, the vehicle will stay level with the stop to stop turn test.

Joe

sal moreno #1288700 Sun Nov 25 2018 03:42 PM
Joined: Jun 2004
Posts: 8,575
W
'Bolter
Take a look at the drag link. It should be horizontally parallel with the ground. The toe-in is critical. There are ways you can check & adjust it yourself. Do a search. A lot has been posted on this. If you have a shim between the axle & spring, make sure the thick part is to the rear.
George


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1972 Chevy c10 Cheyenne Super
sal moreno #1288702 Sun Nov 25 2018 03:54 PM
Joined: Feb 2004
Posts: 25,002
H
Kettle Custodian (pot stirrer)
Unless you're willing to change tie vertical position of the steering gear to compensate for the height change in the front, you need to learn to live with the problem you've created. The drag link must be level, no matter how you go about it.
Jerry


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sal moreno #1288719 Sun Nov 25 2018 04:52 PM
Joined: Dec 2002
Posts: 4,385
Moderator - The Electrical Bay and Rocky Mountain Bolters
I picked up an alignment tool some time ago. It gets my camber, caster and toe in/out close enough to make it drive able.


Another quality post.


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Wrenchbender Ret. #1288734 Sun Nov 25 2018 06:41 PM
Joined: Jan 2009
Posts: 246
S
Shop Shark
I looked at the drag link it is perfectly level with the leaf spring is that what you are talking about now I know my toe in and toe out is not set right .The shim is in the thicker side the rear of the vehicle.

Hotrod Lincoln #1288735 Sun Nov 25 2018 06:44 PM
Joined: Jan 2009
Posts: 246
S
Shop Shark
The draglink is level with the Leaf spring

sal moreno #1288738 Sun Nov 25 2018 06:59 PM
Joined: Mar 2010
Posts: 10,225
5
'Bolter
I believe that you will have a big challenge in getting your bump steer to go away as well as getting good handling quality with the significant difference in ride height between the front and rear axles. I would suspect that removing springs in the rear and adding springs in the front would not result in good handling either. GM engineers did know what they were doing.
Get it aligned by someone who knows what they are doing.
A good indicator that you have found a guy who knows what he is doing will be that he will tell you right away that an alignment probably won't help very much if at all.

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