Rear Rotor Runout
Thread Starter
Racer
Joined: Feb 2010
Posts: 494
Likes: 0
From: Leominster MA
Rear Rotor Runout
I'm almost done with the front end and ready to move to the rear brakes.
I have new rotors and calipers to go in. Question is , whats the best way to check the rounout with a dial gauge in the back?
Few assumptions, both sides on jack stands level out the trailing arms (socket im guessing is easiest), car in neutral, then just spin them like the fronts? I guess im asking because of the axle bind. I always get nervous with the car in neutral and the back end off the ground. (blocks under the front tires enough to keep it from rolling?)
I'd rather do this now than later, I have to bleed the brakes anyway.
I have new rotors and calipers to go in. Question is , whats the best way to check the rounout with a dial gauge in the back?
Few assumptions, both sides on jack stands level out the trailing arms (socket im guessing is easiest), car in neutral, then just spin them like the fronts? I guess im asking because of the axle bind. I always get nervous with the car in neutral and the back end off the ground. (blocks under the front tires enough to keep it from rolling?)
I'd rather do this now than later, I have to bleed the brakes anyway.
Race Director
Joined: Jul 2004
Posts: 12,713
Likes: 329
From: Scottsdale Arizona
I certainly wouldn't touch the half shafts.
I think you'll be fine with both back wheels on axle stands and the car in neutral. Make sure you block the front wheels well and that the car is on level ground. A helper to make sure it doesn't roll wouldn't be a bad idea either.
If you don't want to use a large screwdriver or pry bar to turn the hub, you can leave the wheel on one side while working on the other. Have the helper turn th wheel side. Easy to do by hand.
I think you'll be fine with both back wheels on axle stands and the car in neutral. Make sure you block the front wheels well and that the car is on level ground. A helper to make sure it doesn't roll wouldn't be a bad idea either.
If you don't want to use a large screwdriver or pry bar to turn the hub, you can leave the wheel on one side while working on the other. Have the helper turn th wheel side. Easy to do by hand.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
( not real fond of the socket method)
Melting Slicks
Joined: May 2002
Posts: 2,431
Likes: 52
From: Florida
Yes but Mikes method of unhooking the halfshaft will most likely produce more accurate and repeatable readings. Your going to find that any torque from any direction will move the indicator , were talking about readings the thickness of a hair from a redhead.
( not real fond of the socket method)
( not real fond of the socket method)
And...what kind of hair are we talking about here
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