Quote:
Originally Posted by MikeinNH67
Interesting info. The fluid is entering and leaving the brake cylinders every time you touch the brakes. Having to refill in such a small time frame is odd to me unless there's a leak. If this was a different vehicle I would wonder if the brake booster is leaking fluid into the intake but these are run by motor not vacuum so not that. Cheap brake pads that wear quickly could account for it but they would need to wear extremely fast.
It does seem like these cars use the rear brakes just as much as the fronts which is unlike other cars I have had in the past. When I had a sticking caliper I monitored all of them with a laser thermometer and found the rear brakes seem to run as hot or hotter than the fronts. May be worth monitoring temps for a bit. Sticking (open) front calipers may force more braking to the rear. Sticking (closed) rear calipers may wear out the rears quicker. All things you can figure out by comparing rotor temps after braking or with little to no braking as in roll to a stop.
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Yes, it is interesting and thanks for the info about the vacuum line not being a leak potential!
I just had the 4R back in so they could rework something (not brakes) they hadn't done right, and I had them check for leaks again. They doubled down on the leak, saying there wasn't one. But it is for sure an oddity (and also the pads wearing so quickly in the back). I will definitely be keeping a closer eye on those rear brakes!
BTW - someone else said they wondered why the rear disks weren't as large as the front ones on vehicles now, since they are being utilized more these days. It just occurred to me that even though the rears are being used more than they used to be, the front end gets more weight due to inertia (and also with the extra weight of a V8 on mine). Is that thinking correct?
