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  #1  
Old December 29th, 2005, 20:01
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Talyn Talyn is offline
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8.25 with ABS problem... (creating one)

I recently acquired an 8.25 to replace the D35 under my XJ. My currentl D35 has ZJ discs with ABS. I would like ot keep my ABS. However, I found a suprise under the drum brakes on the 8.25. Only 1/2" of axle shaft showing. That is a problem because the D35 has like 1.5" to 2" showing so the tone ring fits. The plan was to install my ZJ discs w/ ABS onto the 8.25. Problem is that if I put the tone rings on the 8.25's shafts in the position where they need to be the axle shaft won't fit anymore. Basically, there is too much axle tube after the brake mounting surface.

So, here is the idea... use a cone type tube from the alxe shaft flange, which is wide enough to fit over the axle tube and have the tone ring welded to the end of that.. so it kind of a hat that goes over the axle tube..

How does that idea sound?

-Chris
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  #2  
Old December 29th, 2005, 20:45
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Re: 8.25 with ABS problem... (creating one)

I guess that would work. But, keep in mind, if you wanted ABS in an XJ, you got the D35 instead of the 8.25. Do you really need ABS?? If so, why not just keep it up front, if that can be done?

If that were my jeep I'd ditch the ABS.
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Old December 29th, 2005, 23:23
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Re: 8.25 with ABS problem... (creating one)

The 8.25 didn't get abs until the Libby, if I'm not mistaken, again. The solution I settled on with my '01 w/ abs increased the durability of the axle and the off highway reliability of the breaks. I tossed the D35 and abs.
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  #4  
Old December 30th, 2005, 06:00
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Re: 8.25 with ABS problem... (creating one)

I know that the 8.25 never had ABS for the Cherokee. But I would like to make it work. Any ideas? I don't want to compromise onroad saftey for off-road strength.. maybe if it wasn't my driver I would, but it is.
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Old December 30th, 2005, 08:13
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Re: 8.25 with ABS problem... (creating one)

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Originally Posted by Talyn
I don't want to compromise onroad saftey for off-road strength..
Huge difference between ABS and non-ABS braking systems, eh?
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Old December 30th, 2005, 08:43
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Re: 8.25 with ABS problem... (creating one)

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Originally Posted by ECKSJAY
Huge difference between ABS and non-ABS braking systems, eh?
Yeah, actually, there is a pretty big difference.

Personally, though, I wouldn't try to retrofit ABS to an 8.25" axle. I'd look for some other axle that came with ABS.
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Old December 30th, 2005, 09:12
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Re: 8.25 with ABS problem... (creating one)

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Originally Posted by dmillion
Yeah, actually, there is a pretty big difference.
Yeah, I was being a smartass...but it's not such a HUGE difference as to compromise one's safety.
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Old December 30th, 2005, 09:34
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Re: 8.25 with ABS problem... (creating one)

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Originally Posted by ECKSJAY
...but it's not such a HUGE difference as to compromise one's safety.
If you drive in icy/snowy conditions on the road, and you aren't skilled in cadence braking, then it most certainly can be.
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Old December 30th, 2005, 12:04
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Re: 8.25 with ABS problem... (creating one)

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Originally Posted by dmillion
If you drive in icy/snowy conditions on the road, and you aren't skilled in cadence braking, then it most certainly can be.
Thank god for AWD then, too. How did we EVER get along without them both all these years?!

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Old December 30th, 2005, 12:10
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Re: 8.25 with ABS problem... (creating one)

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Originally Posted by ECKSJAY
Thank god for AWD then, too. How did we EVER get along without them both all these years?!

Most rigs are all wheel drive. If you take one off where are you gonna go ?

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Old December 30th, 2005, 12:13
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Re: 8.25 with ABS problem... (creating one)

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Originally Posted by red91inWA
Most rigs are all wheel drive. If you take one off where are you gonna go ?

Tow truck.

Duh.
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  #12  
Old December 30th, 2005, 13:28
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Re: 8.25 with ABS problem... (creating one)

I can't quite compare apples to apples here. Because I haven't ever driven an XJ with ABS. How ever I can say that the ABS on the ZJ's is worthless. The ABS so bad on the ZJ that I find myself a bit worried even in normal stops way to often. It's pretty sad that the XJ with 31's, and rear drum has better brakes than the ZJ on stock 235's, and rear disks. Also my mother has a ZJ with out ABS, and her brakes are the best of all three. In fact I can't recall ever driving anything with ABS that was better than a non ABS system.
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  #13  
Old December 30th, 2005, 20:47
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Re: 8.25 with ABS problem... (creating one)

errr.. ok.. besides debating if it is useful or not, any ideas on how to make it work on my 8.25?

-Chris
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  #14  
Old December 31st, 2005, 06:34
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Re: 8.25 with ABS problem... (creating one)

Quote:
Originally Posted by Talyn
errr.. ok.. besides debating if it is useful or not, any ideas on how to make it work on my 8.25?

-Chris
If you are truley interested try studying up on the Libby 8.25 inch anti lock system.

I do know this much about anti locks on the xj. they count the pulses comming in from the tone rings. A wheel that is turning slower (aka few pulses per second) than the other 3 wheels is started to lock up.

If you do tone rings with a differant pitch aka wider bumps and valleys this may give the computers the signal that a tire is starting to lock up when compared to the front axle.

This actually is a tougher problem then just getting some tone rings and sensors mounted. There is also getting the sensors interfaced and then a possible software issue with calibrating the number of pulses front to rear.

good luck with it... IF you do get it working please post up a parts list and pictures.

Good luck with it....
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  #15  
Old December 31st, 2005, 07:34
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Re: 8.25 with ABS problem... (creating one)

Try looking into what Liberty's do (as suggested) for ABS or also late-'90's Dodge's with the 8.25 (don't remember which models/years).
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