135Boom

Well, I successfully installed the 99-01 brake rotors on my 1990 jeep. So I guess I have new axles front and rear as it turns out. I knew I had a replacement rear axle, but not the front. The '2000' rotors I purchased from napa slid right on, perfect fit. Thanks for all the guess's and trying to help me out, was starting to swet a little there after trying the 90-99 and then the 87-89 with no luck...this was my last shot. thanks again for all the posts!

went and got the 2000 brake rotors from napa. they are the correct depth, not sure if they are the right hub diameter or not yet...have to pop the wheel off and see. If this doesnt work, I have successfully run out of options at napa, as for their rotors...part number run for 89 and below...90-99 ...then 00-01. Already tried the 89's and they were too small of a hub diameter but correct depth. 90's were correct hub diamter, depth was way to deep. 00's are the correct depth, not sure about the hub diameter yet. Still don't know for sure on the high or low pinion. I'll get back to ya! Thanks!!

Any experience with the ones on ebay all the time? Was just about to order them. http://cgi.ebay.com/ebaymotors/ROCKER-P ... ccessories

lol OHH GREATTT! I'm never gonna find out what the hell rotors to buy, hahahahaha! ;) Why did they go to a LP D30 on the new vehicles when floks upgrade to the HP? Kind a odd. Cheaper?

well I hope my memory serves me right and it IS a high pinion D30, lol. :) if it is indeed a high pinion d30, would that also support my theory on these 99+ rotors?

..Almost positive its a high pinion D30. Jeep is at the shop right now having a new fuel sending unit put on it because somehow I broke mine out hunting. The 90 degree elbow coming out of the tank was broken and fuel was leaking from it :( I will double check though and tell ya for sure

Thanks very much for all the replies there fellas. I def don't have 89 hubs, as I said before, I have tried the 89 rotors and my hubs are much bigger. I have tried the 90-early 99 rotors now too. I am going to try the late 99-01 rotors next. They sound like the correct depth :)

I'm sorry eagle, I didnt clarify that enough for you..my bad. I'm the one that looked at brembo and powerslot. I put in cherokee. I thought the same as you that because 92 was the last year of the manche, that I was mistaken...but I was searching under cherokee. Napa does have the 89-90 swap correct, I was referring to napa having them all the same part number from 90-99. I tried out a set of 89 rotors as I thought they were the ticket cause the depth was right on them, never thought to check the diameter of the hub...as the 89's are clearly much different and won't even slide on. This leaves me with only the later 99+ rotors to try out, in hopes that I have a 99 axle/hub bearing assembly under my comanche...otherwise I don't know what to do..lol, besides take the 89's to a machine shop and have it turned out..lol. The 90-99 napa rotors are just waaaaay to deep on my hubs. guess I should have checked to see if my rotors are cast or composite. I'm assuming you can tell the composites are of two different materials? That would clear this all right up right?

Thanks for posting eagle, I sure appreciate it. However, I am confused why folks at brembo and powre slot think there is a difference somewhere after 92. They only list for cherokee's 90-92. No years after that? Napa lists the same part number on all of their rotors, untill 99. I'm really thrown on what the heck to do, to put brakes on my rig..haha. Obviously there IS a rotor out there that fits whatever year my dana30 axle is, cause they are on there right now..just worn out and needing replacement.... I guess according to your post, the only thing I havent tried is 99+ rotors.... Napas 1990 rotors fit the hub, and slide right on, just way too far. The 89s are the correct depth, but won't slide on my hubs. Thats only leaving me with 99+ to try out?

ahh sweet, you are onto something. Its a 231 TC Ive also noticed in rotor listings that 90-92, and 93-98, and 99-01 are all the same for cherokee 4wd's. Perhaps I should bring in my stocker and check out the 99's? not sure what else to do at this point...I know its not a 89 axle and napa is one of the few that have the same rotor all the way from 90-98....

Thanks for all your help man! I am not the original owner unfortunately. However, according to the VIN and title it has always been a 4x4. As for the CAD, I just went out and double checked, and mine does not have that. Its straight tube.

..probably end up with the same exact problem, haha. Ive read that if my truck came iwth composite brake rotors, that they are indeed a different fit than standard. Guess I'll find out when these come in. They are on order. Not sure how you are suppose to know this when shopping for brakes

Yeah, everything that was on the truck matched up perfect. I did ask about the 91 rotors and he told me they were the same part numbers...I can check again though. Not sure what CAD is, sorry. haha ..damn newbee ;)

Hey thanks for the reply. I agree with you with the parts number confusion part...problem is, is I have looked them up too. We tore open several boxes to see if I had mis boxed parts....and no luck. The calipars really arent the problem at all. Its the rotors being over 1/4 inch too deep and sliding on WAAAAAY to far that results in hitting the calipar mount. If the calipar mount wasnt there, then it would be hitting the shield in the back. They are just plain to deep. Also the thickness at the hub is off by about 1/8 on an inch, which adds even more depth to the already to deep rotor, haha. The Dana 30 could be from another year yes. I have checked the 89 rotors and they are waaaay to small, won't come close to sliding on, off by about 3/4 inch. he told me the 90, 91+ were coming up with the same part number.... Ive heard something about 90's having a composite rotor...I'm hoping that will be the difference, as the NAPA guy said they do have slightly different measurements. We'll see.....

Hey fella's. Ran into an interesting problem this weekend. Doing my front brakes, and purchased NAPA ultra premium rotors for the 1990 MJ 4x4. Slid them on the hub and they are Waaay to deep and hit the calipar mount. They are both deeper than stock, and not as thick at the hub end which makes the problem even worst. Brought them back, compared them to 1990 premium rotor and same deal. Checked out an 89 rotor and bingo for the thickness and depth, only problem is its about 3/4 inch in diameter too small and won't slide over the hub? Anybody else run into these problems? This is a stock dana 30 front axle that came on the truck. To my knowledge nothing is differnt that would be causing my problems with rotor fitment. NAPA has ordered me some composite rotors that have slightly different measurements...will that be the ticket? Cause all these other rotors they have for my rig, which seem to be the same for many many year of the xj, don't seem to be workin. Thanks guys!! ~Mark