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I've never had a vehicle that has needed the rear brakes replaced at the same time as the fronts.
No kidding, make sure you look closely at yours. I was just taking a quick look at the rears when I had changed the fronts and assumed that because the outboard pads looked good on the rear the inside would be fine too. !!!!!!The bottom of both inboard pads were done, finished, no more, expired, way past their best.
It seems odd that both rears wore so unevenly and identically.
I assume that your other vehicles were rear drums, not discs, and didn't have the braking controls that these vehicles have? Or am I wrong. I personally would kind of expect these 4 wheel discs to need changing at similar mileages, but I could easily be wrong. Do they put the same pads on the front as the rear? I wonder if the pads were designed to wear at the same rate even though most stopping power is in the front. I am just speculating and have nothing to back these questions up.
You're right though, having the one pad on each side wear that unevenly doesn't seem right.
Older vehicles that have discs up front and drums on the rear normally wear 3 to 1. Three sets of pads to one set of rear shoes. These new vehicles with four-wheel disc break the bounds. Wearability changes with these new applications. Jake.
With the intro of this 4wheel abs disc system ,wear patterns will be not the same as they had been in yrs past with dics/drum systems.
The pressures are now controlled by this ABS module! I have another name for it but can't say here!
Therefor,I would say we need to keep the caliper slides lubricated,so they don't freeze up.
Just more preventive maitenance stuff
On our 99's and up E450's. We do 2 fronts to one rear, mileage varys cause some do more stop and go than others. 18000 to 26000 for fronts.
On the older ones we had with rear shoes some barley made it 10000 miles. Until we started using anti-seize on all the moveable parts including the parking brake cable. Than we started seeing closer to 20000 on the rears.
For the record I changed the fronts about a week ago and they had about 65,000 km's or 40,000 miles..........No I'm not 90 years old!,
A loud horn and a push bumper always help reduce brake pad wear.
Laziness is to blame for not noticing the rears sooner. Of course even if they wear unevenly and last that long I guess I'll be happy.
I was able to go a little over 90k miles on my original brakes. The fronts were down to less than a 16th of an inch(inboard pad) and about 1/8th inch on the outer. The rears were about a 1/4 inch. I changed them anyway.
I just put on my new wheels/tires this past weekend and did a little inspection. Same thing has happened to my rears. The inner pad on both sides was worn almost completely, the outer pad looks like new.
So now I get to find me a Haynes mauual and do a brake job this weekend.
Most fronts I've changed had two slide pins, you had to make sure they were clean and lubed to work properly. If you used an incorrect lubing agent they would freeze during the cold spells or just stick, causing this same wear pattern. I'm not sure how the rears are set up on this truck yet, hopefully it is as simple as a stuck slide pin. Always gotta be something you have to keep an eye on!
Just thought I'd add what I found, and reccomend that you check your rears if you haven't done so in a while.
Heavey duty never seize ,the silver stuff made with the permatex
name on it ,you don't need alot or it will get on the pads or rotors
but enough to lube.
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