RedLeader289

iTrader: (2)

Picked up some AC-Delco gold calipers with pads from RockAuto, was a good deal so I pounced. Got new lines too (cuz why not?). I thought it was interesting that the calipers state that they're the "revised" design. Any idea what changed?

For the inevitable suggestion: no, I'm not throwing them out. Car goes, car stops, I'm not auto x-ing or doing anything insane, happy with the stock performance of the brakes.

sofakingdom

iTrader: (1)

Front or rear?

For the fronts, I know of no changes to those calipers since their introduction in the late 60s.

Rears however, that may indicate that the "recall kit" was already installed in them.

RedLeader289

iTrader: (2)

Fronts, that's what I thought too but who knows.

TTOP350

iTrader: (8)

Revised design for fronts probably means made in china

RedLeader289

iTrader: (2)

Nope, Mexico.

I'm thinking it has to be something internal with the piston or something.

sofakingdom

iTrader: (1)

Possibly...

If so, most likely changing it from aluminum to plastic. Which in some ways, might be an improvement, since plastic at least doesn't corrode.

LiquidBlue

Here is a clue from corvette forum "The new, not rebuilt ACDelco casting being sold today are all SS Lined and I believe they all are the newer design using o-rings and not lip seals."

RedLeader289

iTrader: (2)

Stuff like this is why I love this forum.

That sounds like a plausible explanation.

Beeman

Some calipers of that style were changed to make the piston retract a little to prevent brake drag as a way to increase fuel mileage. I think the piston seal was different.