Question about unit bearings?

[Jeep Driver]

I'm ordering brakes for the front that require the early knuckle. 

 

I currently have a '94 D30. 

 

The unit bearing part numbers differ from early to late. I do not have a set of early unit bearings to compare. 

 

Is there a difference? if so, what is the difference? 

 

 

Thanks. 

[Eagle]

There is a difference. It's in the offset from the rear mounting surface of the ears to the outer surface that the rotor mounts to.

[Crash]

IIRC, using the 00+ UB is what you need to do.

[Eagle]

The following is from my book manuscript, which is copyrighted. Please do not copy and distribute.

 

 

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.
  

   

[Jeep Driver]

I appreciate it guys. I figured the offset was the difference. 

 

 

Thanks

 

IIRC, using the 00+ UB is what you need to do.

For Wilwood?

[Crash]

I appreciate it guys. I figured the offset was the difference.

 

 

Thanks

 

IIRC, using the 00+ UB is what you need to do.

For Wilwood?

Unless they recommend or specify a specific UB, all of the BB kits I know of use the 00+ UB.

 

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