Replacing brake rotors

[Irish_Alley]

you could just take your old ones and get them checked and see if you can turn them down

[Captkaos]

Measure across the face of the rotor.

[greatdane]

The rotors were 4.65 & were junk, got them changed out no more brake shakes! Took my drums of yesterday to paint for the new wheels Im getting. Forgot which drum came off which side? Does it even matter?

[bd]

...Forgot which [drum] came off which side? Does it even matter?

Since the drums normally wear to the shape of the shoes, it might matter.  If you had the drums turned, it probably won't matter.  Glad you got the rotors squared away!

[greatdane]

No didn't have them turned they looked real good. I had them sandblasted at work & painted them today. Wish I would have marked one or remember which one went were. 

[78 Chevyrado]

If it's not obvious which drum goes where by looking at how they have worn in to the shoes, I wouldn't worry about it.  if you think you have a problem later, try swapping them around to see if that fixes it.

[greatdane]

If it's not obvious which drum goes where by looking at how they have worn in to the shoes, I wouldn't worry about it.  if you think you have a problem later, try swapping them around to see if that fixes it.

Yeah thats the how I figured I would handle it. If I hear or feel something I will swap em back.

[oldschoolgmc]

I'd like to revisit GreatDane's original post since I too have this question. My 85 Sierra 2WD build sheet calls out a J55 Heavy Duty Brake package, however, most websites only specify JB3 or JB5. No reference to J55. Anyone know the cross-reference?

[bd]

Welcome to the site from Central California!

See if these help...

http://forum.73-87chevytrucks.com/smforum/index.php/topic,2702.msg11447.html#msg11447

http://forum.73-87chevytrucks.com/smforum/index.php/topic,12737.msg97639.html#msg97639