I've had a couple of requests for shaft dimensions so here is some pics with dimensions for future reference. In the first pic you can see that the overall length of my new one is virtually identical to the original. The only thing that you will need to consider is the type of knob you are attaching and it's thread. Most car shifter knobs are 3/8th UNC ( same as the thread on the one pictured ) but there are variations. The particular knob i used has a screw on cover at the base so it is longer than some of the ball types. It won't be too hard to work out what you will need in regards thread length and you might need to step down the front edge (just behind the thread) if the shaft will go into the back of your chosen knob somewhat. The original stainless steel rod size (2cm portion behind thread) is 16mm or 5/8th, the step down size (rest of the rod) is 13.65mm or about 17/32. The thread size for the knob is 3/8th UNC, as stated, you may need to change that. All the other dimensions i have included on the pics and if you need to ask me any questions about these, then please feel free.
It's my own personal preference of course but i still feel it is far better to keep your original shaft intact. If you ever want to change back it's a 2 minute job to reinstall. You could always sell the original if you never want to change back and it will be worth more being in original condition
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