I have a 91 w250 with the 4500 lbs front axle. Now I know there are 2 different casting numbers and I have vented rotors. I really don't have the place to disassemble my truck and leave it apart to find out which casting number I have. Also I've heard that if you take a 1 ton chevy rotor from that year and drill out the stud holes that would work but I still not sure what I should do. Has anyone ran into this?

 

yes you have a 4500 lb axle just go too Napa and get a set of rotor's and pad's you will be ok .

 

You don't need the casting numbers.


Pull off the tire and inspect the rotor. It either looks like this with the big holes in the hat

http://www.napaonline.com/Catalog/Ca...879_0164745097


or this (without the big holes)


http://www.napaonline.com/Catalog/Ca...843_0148365229

99% chance it's the second one without the holes.

 

Never Any Parts Available. Describes our local stores to a "T"