does your car pull on uneven roads?

OrangeMustangGt

Founding Member

Mar 7, 2002

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36

Cape Cod, MA

Jul 20, 2006

#1

• Jul 20, 2006

• #1

I have 265's on my front tires, and for ever my car has been pulling side to side over uneven roads. My question is, is it my alignment or just the fact that the tires are pretty wide? It is fine on normal smooth roads but the car wants me to commit suicide on bad roads.

i have a cheap alignment gauge, and i measured the alignment and it is within specs(3/32 toe in) But would camber cause this? i may be a bit out.

 

1TallMF

New Member

Apr 17, 2006

955

1

0

Montreal

Jul 20, 2006

#2

• Jul 20, 2006

• #2

aaahhh bumpsteer. A mustang is not a mustang if it doesn't have bumpsteer. Its due to the not-so-great geometry of our front suspension. Wider front tires do contribute to worsening bumpsteer, myself I wouldn't go any wider than 255's on the front because of this. There are a few ways to remedy this, one is offset rack bushings (cheap) or a bumpsteer kit to replace the tie rod ends (not quite so cheap). I don't think either will completely illiminate the problem, but it will improve it dramatically.

 

95strokerPSU

Member

Jul 29, 2004

986

1

19

Sacramento from Philly

Jul 20, 2006

#3

• Jul 20, 2006

• #3

I have the Steeda bumpsteer kit and I still experience what you're talking about.

 

1994Vib.RedGT

Member

Aug 19, 2004

585

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16

Denver, CO

Jul 20, 2006

#4

• Jul 20, 2006

• #4

I have stock front suspension and mine pulls all over the place on uneven roads

 

Mike97gt

it doe snot

Founding Member

Jan 26, 1999

10,633

7

89

the people's republic of massachusetts

Jul 20, 2006

#5

• Jul 20, 2006

• #5

mine used to do it badly but then I realigned it with a tiny tiny tiny bit more toe in and t seemed to fix it. But I am on the stock 245's on a stock suspension..

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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129

Jul 20, 2006

#6

• Jul 20, 2006

• #6

I was thinking the issue might be more akin to tramlining. Seem possible?

 

SeventyMach1

Keep it lubed .... keep it straight .... and keep

Mar 30, 2005

1,940

3

36

North Carolina

Jul 20, 2006

#7

• Jul 20, 2006

• #7

1TallMF said:

aaahhh bumpsteer.


There are a few ways to remedy this, one is offset rack bushings (cheap)

Click to expand...

Not with the stock K-member. They make bumpsteer worse.




I know tires can make a car feel like a different machine. I put my old waffle's (with 265's) on my old Ranger (originally had 245's) and it made the truck squirm back & forth alot more. I guess because I just couldn't get used to the steering differences.

Is it actually bumpsteer that you're experiencing? Doesn't really sound like it, IMO.

 

OrangeMustangGt

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Mar 7, 2002

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Cape Cod, MA

Jul 21, 2006

#8

• Jul 21, 2006

• #8

i have a bumpsteer kit anyhow, and i dont think its bumpsteer anyway....it follows the road badly

 

ProKiller

Founding Member

Apr 26, 2002

3,064

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78

PA

Jul 21, 2006

#9

• Jul 21, 2006

• #9

get smaller tires?

 

94-302-vert

Active Member

Aug 16, 2004

1,947

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36

NE CT

Jul 21, 2006

#10

• Jul 21, 2006

• #10

it is tramelling...

Both tires and alignment affect this...

I had cheap tires on my car and then put on some goodyear tires (the ones that come stock on a 99 gt).. trammelling began.

I lowered it and played with the alighment (I run as much caster and quite a bit of negative camber) and it got at least tolerable...

Changed the front tires out for some $80 general UHP's and the trammeling is gone...

I think it is mostly the tire tread wanting to follow the road and a wider tire simply exacerbates this....

BTW ny original tires were 225/55/16, then the goodyears and generals are the 245/45/17...

 

1TallMF

New Member

Apr 17, 2006

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Montreal

Jul 21, 2006

#11

• Jul 21, 2006

• #11

I stand corrected

 

Methodical

15 Year Member

Dec 1, 2003

1,192

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59

Clinton, MD

Jul 21, 2006

#12

• Jul 21, 2006

• #12

Tramlining. I used to have that problem before I installed my coilover kits and a new 4 bolt CC plate. I have 275/40s (Nittos 555) in the front on 9.5" wheels. What I discovered was that if you adjust to maximum positive caster - pull struts as far back towards the rear of the car as the CC plate allows - you can rid yourself of the tramlining issue. So if you have CC plates experiment with your caster. If you have negative caster the car will feel darty so don't go forward with the strut. This cured my tramlining issue.

 

stang95silv

Member

Oct 8, 2003

93

0

6

Jul 21, 2006

#13

• Jul 21, 2006

• #13

mine pulls a tad.. could be the v8 and v6 springs tho

 

OrangeMustangGt

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Mar 7, 2002

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Cape Cod, MA

Jul 21, 2006

#14

• Jul 21, 2006

• #14

thanks, but i allready checked the alignment and have the maximum positive caster.

The only thing i dont know is the camber......could this being off cause the issue? Also, i think i'll have to try some thinner tires....BUT how do cars with wide tires stock not have this problem?

 

94-302-vert

Active Member

Aug 16, 2004

1,947

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36

NE CT

Jul 24, 2006

#15

• Jul 24, 2006

• #15

I bet it is the choice of tire. With the same alignment settings I noticed a hige difference btween my cheap touring tires that were on the car and the goodyear tires that i replaced them with.

 

9

95_5.0_stang

New Member

Apr 16, 2005

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Lansing, MI.

Jul 24, 2006

#16

• Jul 24, 2006

• #16

stang95silv said:

mine pulls a tad.. could be the v8 and v6 springs tho

Click to expand...

Mine pulls quite a bit both ways on uneven roads. I still have v6 springs in there too, maybe that adds to it.

 

TheDamned

"I am Canadian and Damned for it!"

Jul 22, 2003

457

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48

Montréal, Québec, Canada

Jul 24, 2006

#17

• Jul 24, 2006

• #17

It's normal, i have 275 in the back and 245s in the front and it pulls like crazy and my suspension is almost new.

 

rude_life

Member

Mar 30, 2005

372

0

16

Jul 24, 2006

#18

• Jul 24, 2006

• #18

From what I understand, A bumpsteer kit along with adjustable caster camber plates and those Steeda X2 balljoints solves the problem

 

The Green GT

No 13 year olds are safe around me.

10 Year Member

Jan 8, 2006

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99

Louisiana

Jul 24, 2006

#19

• Jul 24, 2006

• #19

Is there even anytrhing you CAN do about that? If the road it turtle backed, gravity will do whats its supposed to. My car did it with the stock 225's and still dose it with my 255's.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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129

Jul 24, 2006

#20

• Jul 24, 2006

• #20

Eric, I agree with you about crowned roads (that's what you're talkin about with the Turtle backed reference, I think - that's a new term on me but it makes sense). The gyroscopic effect of spinning wheels counteracts the effect to an extent.

However, I think that GMGt is having an issue with the steering darting side to side as he hits ruts and what-not. You constantly have to correct in each direction, not just countersteer into the crown.