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SAS Prep & the Pursuit of ABS

BigBlueBrick

Active Member
Joined
April 11, 2020
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City, State
Los Angeles, CA
Year, Model & Trim Level
1998 Ford Explorer XLT
Lately, I've been doing some pretty heavy research on the different ways people have done their SAS on their 2nd gens as I prepare to start buying parts to do my own. As of now, my plan is a D44 out of a Grand Wagoneer which I will be mounting (hopefully) with CS042r (OME 36) Old Man Emu leaf springs with a SOA using stock springs in the rear. This swap is still a ways away, so I plan to put those OME springs on the rear with a TT up front for the time being. This site has been awesome in terms of the variety of the swaps and different solutions everyone has come up with, but I noticed that everyone seems to ditch the ABS. This got me thinking, and I wanted to run my theories past everyone on the forum.

I figured that the best place to start looking was Ford trucks of the same era due to potential identical parts/systems. Exploring this, I found that the 90s Broncos came equipped with "4WABS" and since they came Dana 44s (albeit TTB), I started thinking there might be a way to make this work. I assume that D44 knuckles are interchangeable, as I imagine that the ball joint placement is identical, and allow the installation of the rest of the bronco hub and brake assemblies. Perhaps this arrangement would complicate the axle shafts by forcing me to use a wagoneer inner, bronco outer, and maybe even a conversion u joint to keep the geometry happy up in the front, but I don't see that as a huge sacrifice. After doing some digging on this, I found that the 1991 - 1996 bronco spindles do have provisions for the abs sensor on both corners (yay), but the tone ring looks to be more like a plastic fan than a gear. This seems to be odd compared to what I've seen other tone rings look like, but I was unable to find a picture of an Explorer tone ring as it's inside the hub. I figured if these two systems, being only a few years apart, could be very similar. Even if the tooth counts are off, the Explorer one could still work on the Bronco hub if the inner diameters are the same or made to be that way, which would work perfectly as I'd be retaining the explorer sensors. Even still, I'm sure there's a tone ring out there that could be made to work based on its tooth count and inner diameter. Again, I still do not know what an explorer's tone ring looks like, but when I get around to my SAS I want to try to retain the ABS. What do you guys think? If there's any info on this I missed somewhere in the forum or in the SAS registry please let me know!

TTB Info Overload

Oreilly's shows the tone ring on the back of their assembly (2nd photo)
 



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why do you want to keep abs?
 






I want to try to keep it because other than convenience, I don't see any benefits to abandoning it. It would be nice to retain the ability to steer and avoid wheel lock-up in emergency situations. I know it would drive fine on-road and be safer offroad without ABS, but I'd prefer to have that peace of mind on-road and do the most complete job I can.

Building off my previous post, it seems like Electrohacker had the same idea 11 years ago that I have now. I can't find any documentation on his profile of his SAS or his ABS solution, so I don't think he ever got around to it. He also talked about an ABS switch writeup he'd seen on the Bronco forums, which solves the issue of having ABS activate on a trail. This will be the route I attempt to go. I will open up an explorer hub I have lying around to see if the tone rings are the same.

 






ive been in an accident offroad due to abs COMPLETELY taking away braking so i just had to point it out. i have been daily driving a vehicle with no abs for the last 8 years and have never had the wheels lock up in an emergency...which, living in CA and commuting for work i encounter plenty.

its your decision obviously, just wanted to share my bad experience. a switch would be cool. but ive never missed abs on the highway personally
 






I see what you mean. Thanks for letting me know. I'm still a ways away from doing my SAS as I'm still in the research phase. You're right that driving without ABS is doable, and I am not opposed to the idea of eliminating the system. I am intrigued by the challenge to make it work. If I do end up making it work whenever I get around to it, there definitely will be a switch to prevent any kind of accident offroad due to ABS. We'll see how it pans out
 






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