Hub bearings 99 XJ

[Strokermjcomanche]

I have two new Mopar hub bearings

 

53007449

53007449ab

 

My 99 Cherokee has two bad bearings and when checking to see if these would fit on the XJ Jeeps parts catalog I'm getting an unclear answer .

 

The parts catalog says the bearings won't fit with cast rotors I've done 4 brake jobs on this so far since I've owned it and I remember there being an option that replaced the full cast rotor , so I can't say for sure what rotors the jeep were born with . My brakes are in good shape and I don't need to replace them and I have a HP30 , any way to know if these are right or not ? Does the AB suffix make a difference? And what all do these part numbers fit ? So I can use them on something else possibly. Thanks in advance

[Green Mesa XJ]

Jeep/Chrysler generally uses the letters to denote a change in designs, sometime ever so slight.

Like for a sensor 56xxxxxxAB, next iteration of that same part ends in AC then AD and so on.

When I swapped a 2012 motor in to a 2006 jeep I checked the part numbers on the 2012 if they were the same except for the last letter being higher I'd use the newer part and it worked fine even though some parts look slightly different to their 2006 counter parts.

 

BTW I thought the axel hub bearings were the same 4x4 Dana 30 axel from like 91-01.

 

 

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[87Warrior]

Match the correct rotor to the wheel bearing and you will be okay :)

[75sv1]

Match the correct rotor to the wheel bearing and you will be okay :)

OP, this is correct info. It should be if you have a Hi-pinion or low pinion front axel. I think they changed in '00. If you keep the rotors from the same years and hub bearing units, they will stack up correctly. The calipers are the same.  I did put in a low pinion 30 in a '98. Used the '98 bearings and rotors.

[Eagle]

BTW I thought the axel hub bearings were the same 4x4 Dana 30 axel from like 91-01.

 

 

 

No, they had a HUGE problem in the rust belt with the two-piece rotors self-destructing. They finally went back to a one-pieve design, and I believe the change was made in mid-year of the 1999 model run. That would explain why there are two part numbers.

[75sv1]

 

BTW I thought the axel hub bearings were the same 4x4 Dana 30 axel from like 91-01.

 

 

 

No, they had a HUGE problem in the rust belt with the two-piece rotors self-destructing. They finally went back to a one-pieve design, and I believe the change was made in mid-year of the 1999 model run. That would explain why there are two part numbers.

 

If so, look at the height difference between the two bearing hubs. It should be obvious. I think about 1/4 inch.

[Eagle]

The following is from the draft of the book I haven't finished. It confirms my recollection. Please do not reproduce. It's copyrighted, and I'm posting it here for information. I am not granting permission for anyone to reproduce it.

 

 

In general, the parts to be concerned with in keeping the front brakes compatible are the steering knuckles, the hub/bearing assemblies, the rotors, and the calipers. (There is a more complete enumeration of the interrelationship of these parts in Chapter 6, Axles.)

 

• Only two steering knuckle designs were used: 1984 through 1989, and 1990 through 2001. Left and right side knuckles are different part numbers within each group.

• Three different hub/bearing units were used. The hub/bearing units are the same for both sides of the vehicle. The different years for hub/bearing assemblies were: 1984 through 1989; 1990 through mid-1999 (composite rotors); and late-1999 through 2001 (cast rotors).

• Three rotor types were used: 1984 through 1989; 1990 through mid-1999 (composite); and late-1999 through 2001 (cast).

• Only two caliper types were used: 1984 through 1989, and 1990 through 2001. Left and right side calipers are different part numbers within each group.