IRS wheel hop
12-16-2013, 07:41 PM
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IRS wheel hop you know, after poking around on here for a while I was convinced that the caddy had this horrible wheel hop problem. Everyone was dead set on dropping in a solid axle to fix it. This weekend I was at a partly and a guy is wearing an SRT jacket. Turns out he has an 09 challenger and is on his 3rd rear end. Same problem over there, he said the dealer doesnt even mess with it anymore, just remove and replace diff. According to him, they dont have all the fancy bushing upgrades etc like we do. On his forums guys just complain about it and theres no fix. Im just saying. Whenever I mention the hop to the owner of the shop i go to he just smiles and tells me his Vette hops like a rabbit too, he says its just an IRS thing and some are worse than others. Of course the mustang he races doesnt....
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12-17-2013, 07:50 AM
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12-17-2013, 12:58 PM
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Just sharing an observation, nothing important.
12-17-2013, 09:06 PM
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YEA I believe, the 6.1. I just wasnt aware it was a big problem for IRS until I talked to my shop guys. As much as the mustangs have been flamed over the years for their "antiquated" solid rear, they launch a lot better like the one above and I understand why people do the conversion. I never owned a car with IRS and power so I was surprised when the shop owner told me his zo6 hops a lot too.
12-18-2013, 10:19 AM
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YAs much as the mustangs have been flamed over the years for their "antiquated" solid rear, they launch a lot better like the one above and I understand why people do the conversion. I never owned a car with IRS and power so I was surprised when the shop owner told me his zo6 hops a lot too.
In all seriousness it can be a lot worse. When viewed from the side on a drag strip you could literally watch the center of the wheel work in an elliptical motion in the wheel well when the car started hopping coming off the line. The tires looked like they were moving (on a clock face) from about 7:30 to 2:00 an inch or two. On the Cobra I was able to tune a fair amount of it out with an adjustable shock but it was always there waiting to rear it's dirty head. That car had a nasty, nasty habit of splitting halfshafts. The fix was to install a set strong enough to handle the twisting stress/torque plus good shocks. You'd just always hope the tires would either 100% stick or 100% spin...any time the car was indecisive you weren't far from disaster. As long as it stuck or spun you'd live to fight another day.
12-18-2013, 10:25 AM
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^the whole point of the cts v wheel hop problem isn't the hop, it's what the hop does to the diff. If the wheel hop didn't shatter the diff it would be a much more liveable problem.
12-18-2013, 12:08 PM
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True, but how many people have broken the 4th gen differential. As far as I can tell there isn't a lot of reports of it shattering. And I was pointing out that the Dodge breaks diff too apparently.