Ok gang, I have bought two sets of pads for ‘88 GTA rear discs from Power Stop and Oreilys and neither worked too thick.

old rotor turned 25.10mm new rotor 26.60mm

distance between pads 20.93mm Oreilys part number MKD202

new pads old caliper 23.20mm gap

any recommended brand that fits?

 

Are you sure the caliper piston is turned all the way in?

 

Yes brand new calipers

 

I just got a set of wagners last summer and they were just fine. The caliper can look like the piston is all the way in when they're quarter turn out. It's just enough

 

Ok let’s say they are out, how do you turn them without damaging them?

also note new pads in old calipers are smaller than rotor. Makes me still think pads too big gap 23.20 vs rotor 26.10

 

Bleeder loose then they should spin 'relatively' easily. I used the tip of a pliers in the grooves and turned. Your caliper piston looks like this, correct?

 

Yes that is it!

 

Yeah she’s all the way in

 

Hmmmm. What pads did you get?

 

See above I’ve had those O’Reillys in power stop

 

Those parts numbers give me front pads. You're fixing the rears right?

 

Oreilys site says rears

 

I looked at the listing wrong like a rube.
I'm not sure why there'd be any difference, unless it's a quality control issue.
Like I said, I used wagners last spring, they worked just fine.

 

Lol I was driving to Advanced and they are temporarily closed due to lack of employees.

 

Maybe they botched the rebuilt calipers? You don't happen to still have the old ones?

 

So you missed that I checked new pads in old calipers and still are too small a gap

 

I did, I've clearly been up too long today.

 

No worries! I may try to get some Wagners if Advanced is ever open. FFS

 

If I get a chance tomorrow, I'll measure the thickness of the pads I have. At least to give you something to compare off.

 

Great thanks!

 

Well dumbass award goes to me! I was afraid to turn those cylinders as they would not spin as easy as advised but grabbed the channel locks and viola, they moved in enough to get them on.

Apologies for all the French four letter words used against Oreilys and Power Stop! Lol

 

Glad it worked out

 

I ended experimenting with the old caliper then just decided to go for it!