<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 12pt;
font-family:Calibri
}
--></style></head>
<body class='hmmessage'><div dir='ltr'><font face="Comic Sans MS,sans-serif" size="3" style="font-size:12pt;" color="#000000">1970 3500S P6B NADA</font><div><font face="Comic Sans MS,sans-serif" size="3" style="font-size:12pt;" color="#000000"><br></font></div><div><font face="Comic Sans MS,sans-serif" size="3" style="font-size:12pt;" color="#000000">Background----Rebuilt engine (2,000 miles total), rebuilt Borg-Warner 35, replaced differential (lower mileage, not rebuilt), rebuilt rear brake calipers.</font></div><div><font face="Comic Sans MS,sans-serif" size="3" style="font-size:12pt;" color="#000000"><br></font></div><div><font face="Comic Sans MS,sans-serif" size="3" style="font-size:12pt;" color="#000000">Car has developed a thumping which appears to be coming from the rear of the car. At speed it disappears, but instantly returns as soon as you take your foot off the gas. I've had the car up on the lift and with the rear end suspended and the transmission in neutral I can rotate the rear wheels by rotating the propeller shaft, i.e., nothing seems to be 'sticking'. I also noticed the left rear caliper is not engaging (right disc is hot to touch after drive, left is cold). </font></div><div><font face="Comic Sans MS,sans-serif" size="3" style="font-size:12pt;" color="#000000"><br></font></div><div><font face="Comic Sans MS,sans-serif" size="3" style="font-size:12pt;" color="#000000">I would appreciate any help in how to diagnose this thumping (and if I'm going to need to drop the differential to address the brake caliper. <br id="FontBreak"></font><br><br><font class="ecxApple-style-span" face="'Comic Sans MS'">Lance La Certe, Psy.D.</font><div><font face="Comic Sans MS"><br></font></div><div><span style="line-height:20px;background-color:rgb(255, 255, 255);"><font face="Comic Sans MS" size="3" style="font-size:12pt;">It is absurd to divide people into good and bad. People are either charming or tedious.</font></span><span style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:14px;line-height:20px;"><br><br></span></div><div><div><div><br></div></div></div></div> </div></body>
</html>