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  #1  
Unread 11th March 2018, 05:34 AM
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Default Will aftermarket suspensions affect ABS?

Hi all,

I was talking with my mate about replacing the rear suspension of my Forester and he swears that the ABS of his Forester was negatively affected by replacing with an aftermarket one of harder spring - ABS not working as expected?

Has anyone of you having similar experience?
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Unread 11th March 2018, 05:45 AM
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I've never experienced any issues with ABS.

What model is your mate's Foz? I believe the newer models have a rear suspension height sensor of some sort but I don't know if it's for the self-leveling headlights or affects the brake distribution system i.e. more pressure to the rear if loaded (like my Triton when loaded) or both?
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Unread 11th March 2018, 05:55 AM
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Not sure of the year but his has the same shape as mine but model X not XS or XT.
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Last edited by Kevin; 11th March 2018 at 09:24 AM. Reason: Unnecessary use of "Quote"
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Unread 11th March 2018, 06:45 AM
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Absolutely no problems with Roo2 after replacing the OEM SLS with Pedders progressive heavier duty complete rear strut units.

That said, I drive on my gearbox, not my brakes. Only time my ABS has ever activated was going down an exceptionally steep, exceptionally muddy slope. It tried to kill me ... .
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Unread 11th March 2018, 02:15 PM
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i doubt 06 forester will have something there for height sensing. it doesnt even have any traction control sensors.
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Unread 11th March 2018, 07:08 PM
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^ Correct, would be SH and SJ with sensors located on the rear lateral arms. Seems it's used just for the headlights.
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Unread 11th March 2018, 07:46 PM
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Thanks all.

Would the spring hardness have any issue to the Subaru ABS? Subaru ABS sensors detect speed of wheel spin only isn't it?
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Unread 11th March 2018, 07:51 PM
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Quote:
Originally Posted by Ratbag View Post
Absolutely no problems with Roo2 after replacing the OEM SLS with Pedders progressive heavier duty complete rear strut units.

That said, I drive on my gearbox, not my brakes.... .
That's what I'm planning to install onto the Forester which my wife drives. I might consider me driving it instead after the replacement

She always drives at lower gears (than me) though
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Unread 11th March 2018, 08:36 PM
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Quote:
Originally Posted by PauSum View Post
Would the spring hardness have any issue to the Subaru ABS? Subaru ABS sensors detect speed of wheel spin only isn't it?
No and Yes. The wheel speed is detected via the tone ring.
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Unread 12th March 2018, 06:05 AM
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It won't have any effect, ABS doesn't work that way. There's no connection between ABS & the suspension.

Lifting or lowering a car doesn't affect the ABS either
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