Stripped Aluminum Shift Shaft and Wooden Knob ? Looking for Fix Ideas (Not Manufactur

Hey folks, I recently purchased a wooden shift **** along with its matching aluminum shaft adapter. The design is pretty straightforward: the **** threads onto the shaft, which in turn slides over a 3D-printed insert that fits onto the factory shift stem. The parts arrived in good shape, pre-threaded, and everything looked promising. But during installation, things went sideways � the **** and shaft started to cross-thread, and once it started stripping, it just tore through the first few threads on both. At this point, the threads on both the aluminum shaft and the **** are toast. I managed to get the **** seated on the shaft, but with the threads chewed up, it won�t stay fixed. A few important details: I need to be able to remove the shift **** from the shaft, because access to the set screws that fix the whole assembly to the factory stem is located underneath the ****. The 3D-printed insert isn�t super snug , so there�s a bit of play where the shaft meets the stem, which adds to the sloppiness. I�m not looking to go back to the manufacturer � this one�s on me. A little more support from them would�ve been appreciated, but I own the mistake. What I am looking for is any advice from people here who might�ve faced similar issues. Is there a way to fix or reinforce stripped threads in a case like this? Should I be looking at thread repair inserts, epoxy, custom re-tapping, or even some kind of set-screw mod to secure the **** more reliably while keeping it removable? Appreciate any ideas � I�d really like to salvage this setup if possible without scrapping the whole thing. Thanks in advance! Not super clear in the photos, but the threads are chewed. Anything that touches is going to eat the threads. Here you can see clearly that the top threads are chewed off. Since this, I've tried to see if I could get the **** to sit lower on the threads. Obviously, I've lost most of the threads now.

A tap and die are probably your best bet.

The 3D printed insert is garbage. There isn't any materials there to cut new threads. You should return the parts as defective and either ask for a new one or a refund.

Quotes source post: 20093927

Thanks, I'll look into that.

Quotes source post: 20094068

Unfortunately thats a not starter. I caused the damage and the distributer knows it. Should they have made a better product, yes. Should they have send some sort of a warning, yes. But at the end of the day, I kind of own this one. Just looking for some sort of a fix.

Quotes source post: 20096855

A tap and die set won't solve this alone. To make it work you will have to tap a larger diameter thread in the **** but you have nothing to work with on the stick to make it wider.

Do they make helicoils that big?

Quotes source post: 20097201

2 sec search. Here is a m18 kit....whats the tread and pitch u r trying to save? Manufacture should be able to tell u. Maybe u can have them send u a new threaded insert and use a kit like this in the ****? Amazon Amazon

Quotes source post: 20097246

For some reason I can't really search anything... ship's internet is trash at the moment.

Hello everyone, thanks for all of the advice. My car just went in for service at my local indy shop. Prepping for our 6000mile road trip. I asked them to take a look and see if they can salvage anything. They are a great shop, so if they can't figure it out, I don't think me (the guy who tripped it in the first place) will be able to make it work. I'll keep this thread updated on the progress. Cheers,

Hey folks, so I managed to fix this myself. My indy shop looked at it, but didn't really want to do it. I filed down the last 2 threads, and then used a bunch of teflon (plumbing tape). The **** managed to grab some threads and threaded itself in place. It feels pretty secure. I've driven it around a bunch over the weekend, and it seems very solid. I'm thinking of maybe dabbing a drop or two glue just to make sure it doesn't pop off, but something small enough I can break if I ever need to take the **** off. Here's a shot during a recent detailing.