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Open Track Racing
IRS, sure gets hot
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<blockquote data-quote="9746Cobra" data-source="post: 5877891" data-attributes="member: 17905"><p>Melted my Maximum Motorsports urethane (Prothane?) differential bushings at Daytona. </p><p></p><p>Had some extra clunk on tip in, found play at the melted bushings. MM offered to replace them when I sent these back, but instead I installed an extra washer on each side to take up the new space. Worked fine. </p><p></p><p>I had the diff oil (motorcraft 75w-140 full synth) at the proper level, but some still got forced out from the axle seals and vent tube. Not much, but some. I cleaned it up and no more has leaked out. It was just caused by the heat and pressure. </p><p></p><p>I know of another Cobra that lost lots of fluid at Sebring. I know this is nothing new, but I thought you guys buying/making diff coolers need them because you were hard core OT'ers. And maybe you are, but even one OT event involving high speeds in an IRS Cobra requires top quality diff oil, alluminum bushings that won't melt, and preferably, a diff cooler.</p><p></p><p>Just thought I'd post my experiences.</p><p>9746C</p></blockquote><p></p>
[QUOTE="9746Cobra, post: 5877891, member: 17905"] Melted my Maximum Motorsports urethane (Prothane?) differential bushings at Daytona. Had some extra clunk on tip in, found play at the melted bushings. MM offered to replace them when I sent these back, but instead I installed an extra washer on each side to take up the new space. Worked fine. I had the diff oil (motorcraft 75w-140 full synth) at the proper level, but some still got forced out from the axle seals and vent tube. Not much, but some. I cleaned it up and no more has leaked out. It was just caused by the heat and pressure. I know of another Cobra that lost lots of fluid at Sebring. I know this is nothing new, but I thought you guys buying/making diff coolers need them because you were hard core OT'ers. And maybe you are, but even one OT event involving high speeds in an IRS Cobra requires top quality diff oil, alluminum bushings that won't melt, and preferably, a diff cooler. Just thought I'd post my experiences. 9746C [/QUOTE]
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IRS, sure gets hot
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