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SVT Shelby GT500
2010 UCA versus 2011-2014
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<blockquote data-quote="XP900" data-source="post: 16588467" data-attributes="member: 199546"><p>Here's another weird scenario I ran into....</p><p></p><p>I used the MMT-1 puller (needed some modifications to make it work) to replace the upper differential bushing that the control arm connects to. Not an easy task even with some of the right tools. (The rubber looked a little cracked but was probably okay.)</p><p></p><p>I ordered part number BR3Z5A638B from American Muscle since it said all 2005-14 Mustangs and a quick search showed it was used on Shelbys too.</p><p></p><p>I compared the old and new part and they were different! I still installed it and later researched it in more detail. The 2010 (Shelby too) and some older models used part 5R3Z5A638DA. This part has a smaller outer diameter of the inner metal bushing and it appears to have more rubber around the bushing. The open cutouts of the rubber on both sides are smaller too. The new part I put in uses a slightly larger outside diameter of the internal bushing and has less rubber since the outside surface is closer to the metal sleeve. (I wouldn't have noticed it but my spacing washers tipped me off when they wouldn't fit over the internal bushing.) It also contains less supporting rubber. Both the old and new have the same inside diameter of the bushing used the same bolt part number for connecting. </p><p></p><p>Not sure why the two parts are different but since I am installing the 2011-14 UCA I'm not too concerned about it. I didn't see any mention of the old SR3Z5A638DA getting superceded by this BR3Z5A638B part which kind of puzzles me.</p></blockquote><p></p>
[QUOTE="XP900, post: 16588467, member: 199546"] Here's another weird scenario I ran into.... I used the MMT-1 puller (needed some modifications to make it work) to replace the upper differential bushing that the control arm connects to. Not an easy task even with some of the right tools. (The rubber looked a little cracked but was probably okay.) I ordered part number BR3Z5A638B from American Muscle since it said all 2005-14 Mustangs and a quick search showed it was used on Shelbys too. I compared the old and new part and they were different! I still installed it and later researched it in more detail. The 2010 (Shelby too) and some older models used part 5R3Z5A638DA. This part has a smaller outer diameter of the inner metal bushing and it appears to have more rubber around the bushing. The open cutouts of the rubber on both sides are smaller too. The new part I put in uses a slightly larger outside diameter of the internal bushing and has less rubber since the outside surface is closer to the metal sleeve. (I wouldn't have noticed it but my spacing washers tipped me off when they wouldn't fit over the internal bushing.) It also contains less supporting rubber. Both the old and new have the same inside diameter of the bushing used the same bolt part number for connecting. Not sure why the two parts are different but since I am installing the 2011-14 UCA I'm not too concerned about it. I didn't see any mention of the old SR3Z5A638DA getting superceded by this BR3Z5A638B part which kind of puzzles me. [/QUOTE]
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SVT Shelby GT500
2010 UCA versus 2011-2014
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