Posted: 9/13/2011 3:52:37 PM EDT
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I think the truck has at least one severely warped rotor, every time you step on the brake (even lightly) there is just a terrible pulsing. Took the wheels off, and the rotors are rusted and a bit thin, so figured it's time. Anything special I need to know about? I need new rotors and pads, anything else I might want to look at while I'm doing this? There is a backing plate (I think that's what it's called) that looks like I should replace, as it's pretty rusted on a couple of them also, anything special about replacing it?
Are AC Delco parts good to go? Rockauto has about the best looking prices, but haven't looked at shipping. Autozone looks like it'll be about $200 for rotors and pads. |
| I'd add pulling the caliper pins & lubing them up. No experience replacing the backing plate. You could run into frozen caliper pistons if you're in the rust belt. Delco parts will be fine. Lately, I've been finding better parts prices for Delco on Amazon, believe it or not. |
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I might be in luck. The fronts don't really look too bad after all. Still good thickness on the rotors, and the pads look pretty decent. I think I'm going to just need to do the rear, and see how it goes after that. And the backing plates on the rear are gone, rusted to nothing. I actually pulled most of them off.
Shipping from Rock Auto is going to kill me, I'll probably just shop around locally for the best price. Thanks! |
| the backing plates are a common thing on the disc brake rear GM trucks....you have to pull the cover on the rear end and take the axles out to replace them, if your truck is a non-limited slip this is easy.....if it's limited slip it's still do-able just not quite as easy.......while you've got the axles out you should at least check the bearings and replace the seals |
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Quoted:
the backing plates are a common thing on the disc brake rear GM trucks....you have to pull the cover on the rear end and take the axles out to replace them, if your truck is a non-limited slip this is easy.....if it's limited slip it's still do-able just not quite as easy.......while you've got the axles out you should at least check the bearings and replace the seals Crap. I honestly don't know if it's limited slip or not, how does one tell? I did find a 2-piece backing plate, I wonder if this would prevent the need to remove the axle? ETA: I googled it and found out that if the tires turn the same way when off the ground and in nuetral, it is a limited slip diff, and it is open if they spin in the opposite direction. When I turn one, the other doesn't turn. So what does that mean? ETA #2: Wheels turn the opposite direction |
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Quoted:
Quoted:
the backing plates are a common thing on the disc brake rear GM trucks....you have to pull the cover on the rear end and take the axles out to replace them, if your truck is a non-limited slip this is easy.....if it's limited slip it's still do-able just not quite as easy.......while you've got the axles out you should at least check the bearings and replace the seals Crap. I honestly don't know if it's limited slip or not, how does one tell? I did find a 2-piece backing plate, I wonder if this would prevent the need to remove the axle? ETA: I googled it and found out that if the tires turn the same way when off the ground and in nuetral, it is a limited slip diff, and it is open if they spin in the opposite direction. When I turn one, the other doesn't turn. So what does that mean? these trucks were either open, or gov lock rear diffs look ikn the glolve box, there should be a sticker with a bunch of 3 digit codes, look for G80, that is thje one for the gov lov but in this instance, the axles come out the same I have not personally used the 2 piece backing plates |
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Quoted:
Quoted:
the backing plates are a common thing on the disc brake rear GM trucks....you have to pull the cover on the rear end and take the axles out to replace them, if your truck is a non-limited slip this is easy.....if it's limited slip it's still do-able just not quite as easy.......while you've got the axles out you should at least check the bearings and replace the seals Crap. I honestly don't know if it's limited slip or not, how does one tell? I did find a 2-piece backing plate, I wonder if this would prevent the need to remove the axle? ETA: I googled it and found out that if the tires turn the same way when off the ground and in nuetral, it is a limited slip diff, and it is open if they spin in the opposite direction. When I turn one, the other doesn't turn. So what does that mean? ETA #2: Wheels turn the opposite direction It could still be a locking rear. It won't engage under those conditions because it's moving too slow. It just needs to spin a little faster to engage, otherwise it behaves like an open diff. Without removing the cover, the fastest way to tell is to give one wheel a few quick spins while both wheels are off the ground. Three quick turns will do it. Just ride the wheel around with your hand as you spin it. The rear end will make quite a harsh sounding clunk just as the lock kicks in. It sounds bad but is completely harmless. If it stays quiet during the spin, then it's an open rear. Either way, the backing plate job is essentially the same. Two piece designs don't make sense to me because you still have to remove the original one piece plates...so the axles still have to come out. Unless you cut the plates or they are so far gone that they can be removed without touching the axles. |