Front Hubs?

Yeah, those unit bearings are pretty pricey new..... I've never bought new, just looked for the newer XJ's in the junk yard and used those. When I 'wheel, I wheel pretty hard and I haven't had to replace one of those used ones yet on any of the rigs I've put 'em on.

Just be careful to get ones that fit your year of XJ. I know there's a year split where the hub flange is thinner/thicker because of the kind of rotors required. I just can't recall the years involved. Searching here should reveal the answer.

If you're wearing them out often then you've got bigger issues. More than likely, the torque used on the hub nut wasn't enough.
 
YELLAHEEP said:
Just be careful to get ones that fit your year of XJ. I know there's a year split where the hub flange is thinner/thicker because of the kind of rotors required. I just can't recall the years involved.

'99/'00 is the changeover, some '99s will have the newer bearing, most will not....................:lecture:
 
91 Jeep Project said:
'99/'00 is the changeover, some '99s will have the newer bearing, most will not....................:lecture:


I thought it was closer to '95/96 with the whole vented vs. composite rotors. John Bjorum dealt with this issue at one time with his '96. Used an older bearing I believe for a trail fix and had to put washers on the lug studs to space the rotor away or washers between the knuckle and unit bearing - don't remember but it was because the rotor bound up in the caliper when the wheel was tightened down.....
 
YELLAHEEP said:
I thought it was closer to '95/96 with the whole vented vs. composite rotors. John Bjorum dealt with this issue at one time with his '96. Used an older bearing I believe for a trail fix and had to put washers on the lug studs to space the rotor away or washers between the knuckle and unit bearing - don't remember but it was because the rotor bound up in the caliper when the wheel was tightened down.....

Yep, thats exactly what happens. Cast vs. Composite rotors, but it IS '99/'00.
 
Well, no. There is also a break at 89/90, and it has nothing to do with cast versus composite. There was also a change in 99, and again it was size, as in offset of the unit bearing, not composition that is a determining factor.

Fred
 
BTW, I bought front hubs at Advance Auto for $67/each for my 90. They look and feel nice, but they are from China, and who knows how long they will last.

Fred
 
Fred said:
Well, no. There is also a break at 89/90, and it has nothing to do with cast versus composite. There was also a change in 99, and again it was size, as in offset of the unit bearing, not composition that is a determining factor.

Fred

With the composition change, they changed the depth of the bearing to accomodate it.........;)
 
Fred said:
Well, no. There is also a break at 89/90, and it has nothing to do with cast versus composite. There was also a change in 99, and again it was size, as in offset of the unit bearing, not composition that is a determining factor.

Fred


That's what I was thinking - as far as the year break-down. But you and DJ are both right. The unit bearing offset was done to accomodate the changes in rotor thickness where it contacts the hub. I just wasn't up to speed on the years the changes were made.
 
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