Inner AND outer anti-squeal shims?

[buddysharp]

Well, on the floor of the garage this afternoon on my '04 100 series. last time I did the rears, I "upgraded" to a power stop set of pads and rotors. I installed the wear indicators as they were on the original and per FSM (seemingly bottom of outside pad). Upon disassembly today, the wear indicator on drivers side broke off and the passenger side was no where to be found. Recently, there was no warning noises from the wear indicators (obviously) and my wife toasted the slotted\drilled rotors on a long trip. Today, bought Toyota rotors, pads, pins, boots and shim kit. Trying to install the wear indicator on the bottom of the outside pad. If I try to slide it OVER the pad and shim, it's super tight on won't seat all the way. If I slide one side of the wear indicator UNDER the shim (between the shim and pad) it fits quite loosely.

Really don't want to muck this job up again and would appreciate effective wear indicators warning me it's time for pads. Going to fiddle now to follow what @2001LC suggested above and put on inner pad at top but still not clear if OVER the shim or between the shim and pad.

Any guidance would be greatly appreciated!

During one of the 16 times I tried to get the pads into the caliper and knocked one pad out while trying to get the second one itn, I figured out I switched up the pads\shims and reversed them (inside vs outside). The inside pad anti squeal shim extends to the tip of the brake pad that slots into the caliper. If you try to put the wear indicator onto that pad, the anti squeal shim gets in the way and thus my previous comment that the wear indicator would have to fit over the tip of the pad and the anti squeal shim.

Given what I found, what @2001LC said about putting the wear indicator on the inside top wouldn't make sense on my truck. I'm guessing if the 2001 uses the older shim anti squeal shims (4 pieces), then maybe the wear indicator doesn't have to fit over the edge of the shim. In my '04 using the OEM kit, the inside pad shim extends all the way to the tip and conflicts. So, I put the wear indicator on the driver's side bottom outisde of the pad and passenger side is on the top of the outside pad. I'll give that a try and report results if anything of note. Fingers crossed I got this right.

Notice we've two variation of the rear shims. The arrow points to location for wear indicator. It is made, for wear indicate on outer pad. But I like inside top. Why: Inside pads wear faster, on 9 out of 10 100 series.
View attachment 4123495

Exactly what I have. I found the wear indicator didn't fit over the pad and lower shim in your picture. Maybe I screwed up but I thought the lower shim in your picture went on the inside? And, if so, it extends to the end of the pad and the wear indicator seems to be made to fit over the pad only; not the pad and shim?

I'm do a little update with respect to anti squeal shims orientation. Whereas the intuitive orientation has cut side of shim out, so wear indicator to outside. Which this matches inner rubber horseshoe to shape caliper. Then flat side or full rubber meet piston on inside.

But I find the inner brake pads are the thinnest 8 out of 10 time. The times, outer pad wearing faster (2 out of 10), is when the retainer clips or shims or pins have issues like sticking.

It may be wear indicator is affecting drag of inner pad, hanging up inner pads. IDK. But because I see so often inner pads wear faster. I've switched to wear indicator on inside. This puts shim in reverse of intuitive orientation for shape of rubber backing.

If I get reports back of pad wear more on wear indicate side, regardless of in or out. Then I'll go back to wear indicate out. But for now I'm place shim cut for wear indicator inside and wear indicate inside.

If anyone has put wear indicator out, and is now replacing pads. Speak up! Which pads have worn the most?

To your question, last time I did this, I put the full cover shim to the inside and horseshoe shape to outside (OEM pads with powerstop drilled\slotted rotors). The inside pad failed first but the wear difference between inner and outer was pretty minimal.

 

[2001LC]

OEM horse shoe shape black inner liner/shim. Is designed for outer pad. But them wear indicator must go on outer. I put horse shoe on inner, so I can clip wear indicator on inner.

This result in a micro flex of inner shim. Rear pad then engages a micro second late. Personally, I've never fleet any difference in braking, when sitting up this way.

Issue many have, getting pads in and caliper on/over them. Is from not compression piston in. It's best bleed open when we compress piston into caliper.

All rear shim kit from 98-07, are the same. Only front shims kits are different (98-03 and 03-07).

Very important. Replace all 4 rear caliper pin boots.

 

[buddysharp]

OEM horse shoe shape black inner liner/shim. Is designed for outer pad. But them wear indicator must go on outer. I put horse shoe on inner, so I can clip wear indicator on inner.

This result in a micro flex of inner shim. Rear pad then engages a micro second late. Personally, I've never fleet any difference in braking, when sitting up this way.

Issue many have, getting pads in and caliper on/over them. Is from not compression piston in. It's best bleed open when we compress piston into caliper.

All rear shim kit from 98-07, are the same. Only front shims kits are different (98-03 and 03-07).

Very important. Replace all 4 rear caliper pin boots.

Thank you, @2001LC for the guidance (and for all the other guidance, too!). I'm sure the micro second delay doesn't change braking response. Still, I thought about this a bit more and am thinking about modifying the inner shim by snipping off a portion of the shim that conflicts with the wear indicator. Then, we could have best of both worlds - inner shim where FSM says it goes AND the wear indicator can be put on the inner to capture when the faster-wearing inner pad gets thin. I marked up your picture to show what I mean.

 

[buddysharp]

For anyone doing rear brakes on a 100 series (mine is 2004), here's the latest part numbers, torque specs and tools needed.

Quantity	Part Number	Description
1	04466-60070	brake pads rear
2	42431-60281	rotor rear
2	47715-60010	top slide pin
2	47715-60020	bottom slide pin w/ rubber sleeve
2	47775-30040	boot, slide pin
1	08887-01206	slide pin grease, rubber-safe
1	04946-60031	anti-aqueal shim kit, rear
note: brake pad kit and anti-squeal shim kit each come with 4 units, which covers entire rear
Torque Specs
14mm bolts on caliper: 20 ftlbs
17mm bolts on caliper bracket: 76 ftlbs
22 mm wheel lugnuts: 97 ftlbs
Tools Needed:
torque wrench
8mm socket	dust shield
14mm socket	brake pad assembly
17mm deep socket	caliper assembly
22mm socket (for wheel lugnuts)
17mm slim wrench	to hold pin while tightening the 14mm brake pad assembly
Caliper compression tool (whatever you prefer)