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Trying to get it mostly right the first time: A 5.9 Magnum and 46RE swapped, Tummy Tucked Daily Driven Jeep TJ
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<blockquote data-quote="hokie_yj" data-source="post: 1572925" data-attributes="member: 4238"><p>The 4.0 in my LJ does the exact same thing. Most people on all the Jeep boards and FB groups say it's a sending unit issue, apparently a pretty common one. They all say to replace it with a Mopar unit only because all the aftermarket ones are junk. I've not done any troubleshooting yet to verify whether it is or isn't the sending unit. But I feel like it is. Like you I hear no ticking or knocking when it does it. Just once it's up to temperature when you stop it drops to zero, fluctuates a couple times, then right back to normal. Wouldn't be surprised if that 5.9 doesn't use the exact same sending unit, especially if it's plug and play with the TJ gauge.</p></blockquote><p></p>
[QUOTE="hokie_yj, post: 1572925, member: 4238"] The 4.0 in my LJ does the exact same thing. Most people on all the Jeep boards and FB groups say it’s a sending unit issue, apparently a pretty common one. They all say to replace it with a Mopar unit only because all the aftermarket ones are junk. I’ve not done any troubleshooting yet to verify whether it is or isn’t the sending unit. But I feel like it is. Like you I hear no ticking or knocking when it does it. Just once it’s up to temperature when you stop it drops to zero, fluctuates a couple times, then right back to normal. Wouldn’t be surprised if that 5.9 doesn’t use the exact same sending unit, especially if it’s plug and play with the TJ gauge. [/QUOTE]
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Trying to get it mostly right the first time: A 5.9 Magnum and 46RE swapped, Tummy Tucked Daily Driven Jeep TJ
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