Can someone post or e-mail me with the numbers
that are cast into the right and left J55 caliper brackets?

I have 2 brackets, one is K3320073C 6 , and K332-072C 6
Are these correct for the right and left?

Thanks,
Russ

 

Darn, I've got the part numbers. Can't help you w/ the casting numbers though.

 

Have a pair from a "89 J55.

K332-073C 6 on both.
Appear identical , interchangible units.

 

Thanks, The pieces I have look idetical also. I wonder
why the have a right and left part number?

Russ

 

Let us think about this one. I am not so sure they are interchangible left to right. One fits left and one fits right. The brake caliper pin fits under the calipers on both the right and the left sides. The brackets should be opposites. GM lists a separate part numbers for the left and the right J-55 brackets. The brackets should not be idential for both side, but rather twins facing in opposite directions. If identical parts, one pin would be on top off the caliper on one of the sides.

What Russ and I are trying to figure out is this, Russ sold me a pair of J55 's to up grade my car. BTW great guy and a smooth transaction! I put the parts aside until I could get time to install. When I looked at the brackets one appeared much narrower. The brackets are of different width and the casting numbers are different (see below).

Larger Calipers (Wider) (J55?) actually the wider bracket.
- The numbers cast into the calipers are K332-073C 6
-These appear to accomodate a 1.25 inch rotor.

Smaller (narrower) Caliper (JL9?)
-The numbers cast into the caliper is K332-072C 4
-These appear to accomodate a 1.00 inch rotor.

Russ and I are trying to determine if I have the right parts to install on my 94 Coupe. I believe I have the correct calipers but the wrong brackets.

Bottom line is one side narrower than the other (The right front is the smaller one).

Thanks to all.

 

I'll be getting some fresh parts on Monday or Tuesday so I can correlate the part number to the casting number for you. Yes, I'm doing the J55 instead of the C5 upgrade.

 

" I am not so sure they are interchangible left to right. One fits left and one fits right. The brake caliper pin fits under the calipers on both the right and the left sides."
You are correct.
Closer inspection shows mine are mirror images not identical.However they both have the same #.
Go figure

 

Thanks! That just answered my question.

Russ