Shift lever threads not 8mm? What tranny?

[Dans240z]

I have bought a new shift knob from MSA. I told the guy I dealt with over the phone that I was buying the shift knob for an 1983 zx transmission in a 1973 240z. He told me that the thread size from 1970 to 1983 is the same, 8mm.

The knob won't fit on my car. My shift lever is too big and I will start to strip the knob if keep forcing it on. The shift lever thread size is more than 8mm. Maybe the guy at MSA is corrrect and I have no clue as to what my tranny is. It is a five speed, and I thought it was from a 83 zx.

All I really want is a shift knob that fits. Ideas?

[wedgey]

why not just get some nuts you have around your workshop and see what fits when you find the one then go to local nut shop and find what bolt thread goes into it and there you go you know the thread size

rob

[Dans240z]

why not just get some nuts you have around your workshop and see what fits when you find the one then go to local nut shop and find what bolt thread goes into it and there you go you know the thread size

rob

I want to know what transmission this really is and what car it origionaly came from, not just the thread size. Once I find the correct thread size, I want to buy a shift knob that fits.

[Inf]

Measure the outer diameter of the threaded region, that is the diameter. This is easy if you have a vernier caliper, however you could still do it accurately other ways with some ingenuity and a basic ruler with mm markings. The thread pitch is determined by the distance between the threads, so just measure from peak to peak along the axis of the rod.

This will most likely not be an integer and be something like 1.25 or 1.5mm. It will be easier to measure if you just measure the distance between 10 threads, then divide by that number.

In metric you will have a value like 8.00x1.25 or 10.00x1.25 or something to that effect that you can use to find the right knob.

FYI, the original shifter in my '72 has an 8.00x1.25 thread with the original knob.

[webdawg1]

A "Metric" thread gage would be a real handy tool right about now...once you have the pitch and diameter of the shifter handle you'll be good to go...Found a "Printable Metric Thread Gage" that might help you out some. Just follow the following directions when you print it, so it will print correctly.

Directions: After downloading the file and printing it, do a quick scale check to make sure your printer printed it to the true size. Use a ruler to verify the printed scale is right on. Note: if using Acrobat Reader to print the .PDF file, make sure the "Fit to Page" check box is unchecked. That will allow the thread gage to print in the true size. (If the size is still not right you can use a Xerox machine to reduce or enlarge it slightly). Also uploaded a "Word" version...

webdawg1

webdawg1

Gear-Shift Thread Gage.pdf

Gear Shift Thread Gage.doc