Disc brake rotor wobble HELP! - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 01-15-2017, 03:23 PM Thread Starter
 
Join Date: Jan 2017
Posts: 22
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Disc brake rotor wobble HELP!

Ok so I'm at my wits end with this. I have a 66 tempest that originally came with drum brakes and swapped over to 4th gen F-body brakes. For the front I used BRP Hotrods kit and machined my own hubs down to fit inside the 4th gen rotor. I installed New bearings and seals as well as the 2mm spacer under the inner race that came with the BRP Kit to center the hub in the abutment brackets. When I install the hubs now there is a noticeable wobble on the rotors. They are brand new rotors and check true and I "test torque" then to 30 ft lb to make sure they are properly seated. I've even swapped out the rotors to eliminate that possibility. I've properly seated the bearings in the spindle and the hub bearings spin freely with no indication of catching. When the hubs were on the lathe they didn't appear to be bent at all (they were out of round a bit of course because they are cast hubs but now they have been turned down that is not the case). I don't have a dial indicator to check 100% that the hubs aren't bent but I'm just asking to make sure there isn't something I'm missing. This is the case for both hubs, and also swapping them to different sides hasn't helped either. Thanks in advance for any input!

Mike
Dealer369 is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 03-30-2017, 01:22 PM
 
Join Date: Oct 2011
Posts: 41
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Hi Mike,
I have the same problem. I converted my drum brakes on a 1967 lemans to disk front and back and am seeing both of my rear rotors wobbling. Not sure if this is a rotor or hub issue at this point and plan on checking with a dial indicator. Did you resolve the issue and if so how. I have bleed my brake lines several times and still have a soft pedal which could be from the wobble in the rotors.

Thanks
RM9700 is offline  
post #3 of 3 (permalink) Old 04-30-2017, 06:45 PM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 8,543
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 118 Post(s)
You can have any brake shop turn the rotors true with an 'on car' AccuTurn lathe. It bolts up to the brake caliper mount and cuts the rotor as it turns on the hub. 100% guaranteed to true your rotors.
geeteeohguy is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Exhaust, Suspension, Alignment, Fuel Tank and Brakes.

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
front brake rotor Topkat 1964-1974 Tempest, Lemans & GTO Exhaust, Suspension, Alignment, Fuel Tank and Brakes. 0 06-27-2014 03:59 PM
Accidentally Hit My Brake Rotor jtwoods4 1964-1974 Tempest, Lemans & GTO Exhaust, Suspension, Alignment, Fuel Tank and Brakes. 4 01-13-2013 07:48 PM
Discoloration on brake rotor. What is it? jtwoods4 1964-1974 Tempest, Lemans & GTO Exhaust, Suspension, Alignment, Fuel Tank and Brakes. 6 12-10-2012 02:30 PM
Brake Rotor Hub Covers kicks06 Wheels and tires 0 01-22-2009 09:36 AM
front disk brake rotor question matt68gto 1964-1974 Tempest, Lemans & GTO Exhaust, Suspension, Alignment, Fuel Tank and Brakes. 1 02-09-2007 08:03 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome