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2012-2013 Boss 302 Mustang
Boss302S
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<blockquote data-quote="ac427cobra" data-source="post: 13481531" data-attributes="member: 6247"><p>Just thought I'd let my fellow Boss 302S owners in on an issue I've had with my SRA LCA's. </p><p></p><p>Back in June of this year I was at Road America at the Northwood's Shelby Club track event and I started to hear a knocking sound in the rear end. We gave the car a cursory inspection and found the diff catch can a little loose. I told the crew, that's NOT what I'm hearing but I'm willing to give it a shot. Sure enough, the sound didn't change. </p><p></p><p>Next event the knocking sound got a bit louder. Still could not find it. The last event I did, it sounded like the rear axle was going to be falling out of the car at any given moment.</p><p></p><p>We gave the car a <strong>VERY</strong> thorough inspection and found a significant amount of play in both ends of both LCA's. When we removed the LCA's we found a lot of play in mounting points. We thought it was in the spherical bearings. When we took the spherical bearings out of the control arms they pretty much fell right out. Although the spherical bearings had 'some' play in them, the biggest problem was the fact that the bore for the spherical bearing was about .006" too big. In addition, the bushings that take up the space between the mounting bolts and the spherical bearings also had a few thou clearance as well. </p><p></p><p>So..........after blasting off the powder coating (tough stuff) we tried heating up the eyes to shrink them and didn't have a lot of success. So then we heated them up again and had a little squirt bottle and sprayed some water on the bore and actually had more success. You would not want to do a full quench because you'd run the risk of making the eyes on the control arm brittle. </p><p></p><p>We ended up shrinking the eyes enough to where we are pretty happy we will have a tight enough press along with the assistance of some Loc-tite press fit assist. We also ended up replacing the spherical bearings and having to knurl the bushings that take up the difference between the spherical bearings and the mounting bolts. </p><p></p><p>Pretty sure we are going to be making these in the not too distant future. Not really happy with this design. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p><p></p><p>Hope this info helps. </p><p></p><p>:thumbsup::coolman::beer:</p></blockquote><p></p>
[QUOTE="ac427cobra, post: 13481531, member: 6247"] Just thought I'd let my fellow Boss 302S owners in on an issue I've had with my SRA LCA's. Back in June of this year I was at Road America at the Northwood's Shelby Club track event and I started to hear a knocking sound in the rear end. We gave the car a cursory inspection and found the diff catch can a little loose. I told the crew, that's NOT what I'm hearing but I'm willing to give it a shot. Sure enough, the sound didn't change. Next event the knocking sound got a bit louder. Still could not find it. The last event I did, it sounded like the rear axle was going to be falling out of the car at any given moment. We gave the car a [B]VERY[/B] thorough inspection and found a significant amount of play in both ends of both LCA's. When we removed the LCA's we found a lot of play in mounting points. We thought it was in the spherical bearings. When we took the spherical bearings out of the control arms they pretty much fell right out. Although the spherical bearings had 'some' play in them, the biggest problem was the fact that the bore for the spherical bearing was about .006" too big. In addition, the bushings that take up the space between the mounting bolts and the spherical bearings also had a few thou clearance as well. So..........after blasting off the powder coating (tough stuff) we tried heating up the eyes to shrink them and didn't have a lot of success. So then we heated them up again and had a little squirt bottle and sprayed some water on the bore and actually had more success. You would not want to do a full quench because you'd run the risk of making the eyes on the control arm brittle. We ended up shrinking the eyes enough to where we are pretty happy we will have a tight enough press along with the assistance of some Loc-tite press fit assist. We also ended up replacing the spherical bearings and having to knurl the bushings that take up the difference between the spherical bearings and the mounting bolts. Pretty sure we are going to be making these in the not too distant future. Not really happy with this design. :( Hope this info helps. :thumbsup::coolman::beer: [/QUOTE]
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