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Old 01-23-2020, 04:02 PM
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ZJ vs TJ Rear Discs...Differences?

I'm putting together a list of components that I need to convert my D35 with drums to discs. This is what I have so far:

-ZJ mounting bracket/backing plate

-TJ/Liberty calipers to take advantage of the mildly larger TJ pad with stainless steel abutment clips per Mr.Blaine (https://www.jeepforum.com/forum/f9/u...rsion-1188732/)

-TJ/Liberty larger pads

Now this is where my question comes in...on Rockauto, it shows different part numbers for the rear rotors on a ZJ and another part number for rear rotors on the TJ/Liberty--is there a difference between the rotors?

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Old 01-23-2020, 04:06 PM
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As an aside, I also noticed on Rockauto that the rear calipers and pads for the TJ/Liberty also cross reference to calipers and pads for Explorers, Explorer Sport Tracs, Mountaineers, Aviators

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Old 01-23-2020, 06:18 PM   #3
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One is a d35 other is the aluminum D44



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Old 01-23-2020, 06:21 PM   #4
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Old 01-23-2020, 07:01 PM
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I've read both of those write-ups but neither shows the differences between ZJ and TJ rear rotors.

I just checked RockAuto and it seems that the only difference is the height and thickness of the rear rotors.
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Old 01-23-2020, 09:53 PM   #6
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Typically the v8 zj has the 44A and the six had the 35 at least in mid 90s years


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Old 01-23-2020, 11:35 PM
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Quote:
Originally Posted by Digger84 View Post
Typically the v8 zj has the 44A and the six had the 35 at least in mid 90s years


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Did some quick searching on the ZJ forums and found out that the 35 and 44A use the same rear brake setup.

Still doesn't explain the difference in rotors between the ZJ and the TJ rotors. Diameter is the same between the two but the TJ rotors are slightly thicker and and shorter...(nominal thickness for the TJ rotor is .472 compared to .430 for the ZJ --- height is 2.3 for the TJ and 2.4 for the ZJ; all in inches) Doesn't seem like a big enough difference so I'll just stick with the ZJ rotor and then get a hold of some TJ calipers and pads per Mr.Blaine's suggestion.

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