Hello everyone...I'm gathering parts for the ZJ rear disc conversion on my XJ... I've already bought the Crown 476212829K rear backing plate set...I'm looking on Rockauto for calipers and have come across some that have "From Vin 358321" .. Does anyone have any insight into what the difference is between the two calipers ?? And which one is the better choice for the conversion ?? Thanks ..

 

Yes!
The 94 year of the ZJ had a transition on the rear brakes half way through production. Not only the calipers, but also the pads and brackets will be different. The Rotors would be the same however.
Do you know what year ZJ you took the the caliper brackets off of?
When I was in the junk yard, I took a picture of the VIN of the ZJ that I grabbed parts off of.

 

Thanks for the reply... I didn't get any boneyard hardware...I'm buying all new parts.. The Crown backing plates/caliper bracket states 94-98 ... I was using 1997 as the year on the Rockauto site but a quick reference for the caliper also states "94-98" .. So I'm thinking I should be safe with the choice of caliper...The other caliper states "before VIN 358321" ... I'm assuming that is the odd,early 94 caliper...