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Old 03-23-2021, 09:52 PM   #4
Rustys14
Zilvia Junkie
 
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Join Date: Jan 2013
Location: Virginia
Age: 30
Posts: 591
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This happened to me years ago when I had my old s14. The nuts inside the subframe are only lightly tacked on from the factory and seem to be prone to breaking due to age/rust. Based on the pic it looks like you have an s13 diff in your car so someone likely crosthreaded the bolts when they installed it and the removal force was more than the weld on the nut inside the subframe could take.

This isn't what you want to hear, but if the nut is spinning there really isn't a good way to fix it without dropping the subframe. If you can find a good way to pry down super hard on the front of the diff, the force may be enough to keep the nut from spinning while you remove the bolt if your lucky. What I did with mine was drop the subframe, cut access ports above the nuts and weld new ones in place. It really isn't a ton of work if you have the tools, but I'm getting old and lazy so if it happened to me again I would probably just source a new subframe and call it a day.
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Originally Posted by bossin240 View Post
I have a pretty badass neon.
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