diff tire sizes causing ABS to trigger!
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Joined: Aug 2002
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Well, I can only speak from experience this problem goes away when I put slicks on the stang at the track and comes right back as soon as I put my street tires back on. I switched from 3.27s to 3.73's and the slicks are much taller than my street tires, I never bothered to figure out the actual ratios but I assumed it was because the taller slicks were putting the ration back closer to what the factory wqas with the 3.27s. If this is no the case how do you explain this? LOL I'm more curious than anything now...
Maybe its just some freak phenomena but its happend on not only my current 94 Stang but also my older 91.
Maybe its just some freak phenomena but its happend on not only my current 94 Stang but also my older 91.
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Originally posted by droptail
Thanks, and sorry Argent L about my post editing. I will re-post in the future (you can't be sure what you're answering to with me). Won't the wheel sensors still read a diffenence in wheel velocities front to rear and trigger an ABS condition?
Thanks, and sorry Argent L about my post editing. I will re-post in the future (you can't be sure what you're answering to with me). Won't the wheel sensors still read a diffenence in wheel velocities front to rear and trigger an ABS condition?
I really dont know what to say though as in my previous post my ABS light goes off and the ABS works properly when I have the slicks on my stang which are definitely taller than my front tires. And this same problem you describe resumes once the street tires are put back on...
Strange
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From: kinston nc
Originally posted by Argent L
but also my older 91.
but also my older 91.
No such thing as abs on a 91 mustang.
A 94 mustang uses a transmission tailshaft driven vss for the speedometer, and variable reluctance sensors on all 4 wheels with tone rings on the bearing hubs in front, and axle flange on the rear. No matter what you do to the rear end ratio in any vehicle that measures abs wheel speed out at the wheel hub will affect the speed signal to the abs module. What it will affect is the speedometer vss reading if it is measured at propellershaft speed. (like in a 94 mustang).
In fact, before 1997, from 92-96 F150s, the speedometer (psom) was calculated off of the differential tone ring, and as long as you didnt mess with the tire size, changing rear end ratios wouldnt even change the speedometer accuracy one bit. This only worked like that in the F and E series with the psom.
Last edited by kidtriton; Sep 8, 2002 at 05:05 PM.
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Originally posted by jefflaws
No such thing as abs on a 91 mustang.
A 94 mustang uses a transmission tailshaft driven vss for the speedometer, and variable reluctance sensors on all 4 wheels with tone rings on the bearing hubs in front, and axle flange on the rear. No matter what you do to the rear end ratio in any vehicle that measures abs wheel speed out at the wheel hub will affect the speed signal to the abs module. What it will affect is the speedometer vss reading if it is measured at propellershaft speed. (like in a 94 mustang).
In fact, before 1997, from 92-96 F150s, the speedometer (psom) was calculated off of the differential tone ring, and as long as you didnt mess with the tire size, changing rear end ratios wouldnt even change the speedometer accuracy one bit.
No such thing as abs on a 91 mustang.
A 94 mustang uses a transmission tailshaft driven vss for the speedometer, and variable reluctance sensors on all 4 wheels with tone rings on the bearing hubs in front, and axle flange on the rear. No matter what you do to the rear end ratio in any vehicle that measures abs wheel speed out at the wheel hub will affect the speed signal to the abs module. What it will affect is the speedometer vss reading if it is measured at propellershaft speed. (like in a 94 mustang).
In fact, before 1997, from 92-96 F150s, the speedometer (psom) was calculated off of the differential tone ring, and as long as you didnt mess with the tire size, changing rear end ratios wouldnt even change the speedometer accuracy one bit.
Anyway the 94 I still own and this still happens when I go to the track and put the slicks on ABS light goes off put street tires back on and ABS comes back on...have not actually ever locked up the brakes to test that I can remember but putting the slicks on definitely makes the light go out