Looking for one. I'm looking at putting a 9 inch Ford rear in my truck and I want to retain the rear wheel ABS. I can't find anyone willing to build one with the tone ring on the ring gear, but it was suggested that a tone ring on the driveshaft side might solve my problem. So, I'd need to reprogram the ABS with the new count. Any suggestions other than forget the ABS?

I'm also open to non-Ford 9 inch suggestions that will allow the ABS to remain, that can handle a forced induction 427.

 

What diff ya got in there now? Dodge used a pretty wide selection of axles that had the provision for the rear wheel speed sensor. I think the dodge 9.25 would tolerate a fair bit of power, if properly built. And in a truck, it really isn't that much of an issue, as you will be traction limited anyway.....

 

It has whatever the stock rear is for an SXT with the 3.9L auto 2WD, 3.55 ratio. And, I won't be all that limited on traction even though it's a truck as there will be other weight shifting mods performed. Once he starts the work I'll start a project post to detail my build.

 

What does the diff cover look like, and how many bolts? Round, with 10 bolts, 8.25 rear. Octagonal, with 12 bolts, 9.25 rear axle. The 9.25 axle came stock in full sized cars during the sixties/seventies behind a 440...... So, pretty stout axle.

 

I will be in the same situation as you are.

What you wish to do it not directly possible. The ABS computer counts in ring gear revolutions per mile only.

Thankfully, Yukon gear says the tone ring for both 8.25 and 9.25 is 108 teeth: https://www.yukongear.com/partslist....gs+%26+Sensors

P265/75/16 = 659 revs per mile = 71,172 teeth per mile
P245/70/16 = 706 revs per mile = 76,248 teeth per mile

If you don't plan to change tire sizes, then the driveshaft count is simply 108 divided by the gear ratio.

For mine, I'm planning to run three different third members (full float 9" to allow 10 minute gear change for Drag Week)

2.25 highway: 48 driveshaft teeth
3.23 quarter mile: 33 driveshaft teeth
3.90 eighth mile: 27 driveshaft teeth

If you plan to change tire size, then that math also has to be factored in.

 

Also, the ABS computer only takes a tight set of values. Like 600 to 800 I think. So you can't fib too much in changing to a "more common" tooth count then modifying the counter to match it. That's what I had intended on doing, was running the Motion Raceworks 18 tooth sensors. But that would still be way outside the range the ABS accepts.

 

That will take a few days to answer. I'm afraid of the blowing rain and cold, and we have tons of it right now. As soon as I'm able to get under there and get a pic I'll post it up.

My life will be quite a bit simpler than yours. My tire size will be 255/55R18, or 29 inches tall. The ratio will be fixed as well.

This is what I was exploring, but if you've already done the investigation and determined it won't work, sucks but at least it saves some time. Appreciate it. I'm not too familiar with the 9 inch innards, do you know if it's possible to attach a tone gear to the ring gear? It almost looks like a person could have a ring gear made that could slide on between the bolts and the part the ring gear attaches to, So long as the tooth count is the same, the sensor shouldn't know the difference if the diameter is off provided it isn't too much smaller, but I don't know if it would fit to begin with. I've only ever had my fingers in GM rear differentials.

 

Honestly, go with a Ford 8.8 out of a 1986-96 Ford Bronco or 1986-00 Ford F150. They also use a 108 tooth tone ring on the ring gear. I think the Explorer and Ranger use the same housing but add tone rings at the axle flange for the 4W ABS. At some point the carrier tone ring went away completely (08 maybe?).

Edit: https://www.randysworldwide.com/product/yspabs-017/ says that it's the following:

• Ford Bronco (1983 - 1996)
• Ford Crown Victoria (1983 - 2011)
• Ford E-100 1/2 Ton (1983 - 1983)
• Ford E-150 1/2 Ton (1983 - 2014)
• Ford E-250 3/4 Ton (1983 - 1998)
• Ford Expedition (1997 - 2001)
• Ford Explorer (1991 - 2001)
• Ford Explorer Sport Trac (2001 - 2010)
• Ford F-150 1/2 Ton (1983 - 2009)
• Ford Fairmont (1978 - 1983)
• Ford Granada (1979 - 1982)
• Ford LTD (1979 - 1991)
• Ford Mustang (1979 - 2009)
• Ford Ranger (1990 - 2011)
• Ford Thunderbird (1987 - 1988)
• Lincoln Aviator (2003 - 2005)
• Lincoln Continental (1979 - 2000)
• Lincoln Mark LT (2006 - 2008)
• Lincoln Mark VI (1980 - 1983)
• Lincoln Mark Vll (1984 - 1992)
• Lincoln Navigator (1998 - 2002)
• Lincoln Town Car (1981 - 2011)
• Mazda B3000 (1994 - 2002)
• Mazda B4000 (1994 - 2007)
• Mazda Navajo (1991 - 1994)
• Mercury Capri (1979 - 1986)
• Mercury Cougar (1979 - 1988)
• Mercury Grand Marquis (1975 - 2011)
• Mercury Marauder (2003 - 2004)
• Mercury Mountaineer (1997 - 2010)

 

As far as how the tone ring fits - it is pressed onto the carrier itself on some housings, others it has tangs or a groove that fit into the carrier than are bound by the ring gear (the indention is on the RG mating surface of the carrier). Then you have to drill the nodular housing for the sensor to poke through, and hope it doesn't leak and is in the right place. It's not a fun conversion for a F9. The Ford 8.8, Chry 9.25", and Dana 44 are all structurally equivalent and considered as 1/2 ton axles (some would argue a 44 is closer to 3/4 ton rating)

If you are dead-set on a removable third member, then you're going to be doing some custom work regardless. They don't make a tone ring carrier for either the F9 or Chry 8.75 . I think the Dana 110 might use a carrier tone ring, I know the 130 doesn't.

My plan was to get a set of tone wheels custom cut (Laser/Water Jet) that would mate to the back of a companion flange ( https://www.quickperformance.com/For...e_p_20368.html ). That way I have have all three third members set up identically, and no U-joint straps to fail or worry about over/under-tighteninig.

 

Thanks. I was looking at the 9 inch as it can handle the expected output of the drivetrain, plus my suspension guy is used to working with them. A removable carrier is not a requirement for me as I plan to set it up once, and be done with it. I'll look into your recommendations.