2nd Gen Non-Engine/Transmission pics of rear pads after 125K

[johncameron]

It looks like I got luckey, look at the crack on one of the pads. I was able to turn the drums and put new pads. Not too bad life on the pads, 125000miles



John

 

[jelag]

These are brake shoes..... pad is the term used for disc brakes...



The cracks your seeing is from excessive heat and you've cooked the resin from the lining and than they have cracked..... later, if you'd let this continue you'd flakes off material,as they started to separate... ...



Hopefully you've installed new shoes that meet or exceed the material used on this set. . going to a cheaper grade of lining would allow for the heat to cook out the resin's faster... .



Also notice that the leading shoe, (facing front) has less material then the trailing shoe... the leading shoe is a different coefficient of friction than the trailing shoe... .



Hope this is the kind of information you were looking for... .



BTW - if your drums were heat checked as well, who ever turned them for you should have used a grinding stone for the final pass to remove the high spots... . as a tool cutter hits a heat check the tool bit jumps leaving a low and high spot... this low and high spots can cause excessive wear on the new shoes... . the final pass with a grinder will lower the high spots giving you better braking... . and longer shoe life...

 

[johncameron]

I'm sure I overheated my rear brakes on the dyno buliding boost down low to get better TQ #'s.



I replaced the shoes with OEM parts.



The shop that replaced the shoes work on trucks and big rigs so hopefully they resurfaced the drums properly. They did say the drums were warn uneven and they flattened them back up.



Thanks for the input.



John

 

[Nate]

Those shoes don't look worn to me. I'd still run them.

 

[CumminsPower98]

Mine are still rolling at 323k with plenty of lining left. I have the hight sensing valve tied open too but I am easy on brakes. At some point I should probably just replace the shoes and cylinders as they have had some oil on them and I think I have a few cracks as well. I think the wheel cylinders are starting to seep slightly too. The last 200k miles have been OTR transporting RVs. I have 200k on the fronts also as I changed them when I got on the road towing and they are not much more then half gone.

 

[johncameron]

Those shoes don't look worn to me. I'd still run them.

Did you see the cracks in the second photo

 

[Nate]

Yeah I see the cracks. Doesn't look anything serious to me.