Miata Turbo Forum - Boost cars, acquire cats.
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Remove these M8 bolts (12mm head)
Remove these M8 bolts (12mm head)
0 2025/08/29 21:54:58
Remove this sensor. Whichever it is.
Remove this sensor. Whichever it is.
0 2025/08/29 21:55:01
Remove the upper half of the shift box and then remove the bolt holding the shift cup to the shaft (12mm head)
Remove the upper half of the shift box and then remove the bolt holding the shift cup to the shaft (12mm head)
0 2025/08/29 21:55:04
Remove the speedometer sensor.
Remove the speedometer sensor.
0 2025/08/29 21:54:54
Remove this M8 bolt to the rear of that sensor you removed, before you attempt to separate the case.
Remove this M8 bolt to the rear of that sensor you removed, before you attempt to separate the case.
0 2025/08/29 21:55:07
This is the area I’m targeting. That’s the sixth gear what’sy doo dad, and the rod sticking up through the casting is the whoosy-do.
This is the area I’m targeting. That’s the sixth gear what’sy doo dad, and the rod sticking up through the casting is the whoosy-do.
0 2025/08/29 22:01:04
Here’s where it sits on the inside. It’s above (towards the cabin) the 6th gear shift fork travel. I hope.
Here’s where it sits on the inside. It’s above (towards the cabin) the 6th gear shift fork travel. I hope.
0 2025/08/29 22:01:19
My 3D thinking says this is about the right place for the Ballenger sensor. It’s definitely in the fluid, yet should clear both the shift fork and whatever that other rod is. In theory. I will check this tomorrow after reassembly.
My 3D thinking says this is about the right place for the Ballenger sensor. It’s definitely in the fluid, yet should clear both the shift fork and whatever that other rod is. In theory. I will check this tomorrow after reassembly.
0 2025/08/29 22:01:07
I believe that as long as the sensor is to the rear of this notch in the 6th gear shift fork (rear being “above” in this photo) it won’t interfere with the rod.
I believe that as long as the sensor is to the rear of this notch in the 6th gear shift fork (rear being “above” in this photo) it won’t interfere with the rod.
0 2025/08/29 22:01:10
I’ll share the measurements tomorrow, but by my calculations, this area is in the fluid, clear of the shift mechanisms, and leaves room for a wrench on the sensor
I’ll share the measurements tomorrow, but by my calculations, this area is in the fluid, clear of the shift mechanisms, and leaves room for a wrench on the sensor
0 2025/08/29 22:01:14
I went ahead and drilled and tapped the hole.
I went ahead and drilled and tapped the hole.
0 2025/08/29 22:01:17
This is the area I targeted for my sensor. It’s actually a bit upwards (towards the cabin) from where I had planned.
This is the area I targeted for my sensor. It’s actually a bit upwards (towards the cabin) from where I had planned.
0 2025/08/29 22:17:32
Drilled and tapped hole. I’ll share measurements after I confirm there’s no interference.
Drilled and tapped hole. I’ll share measurements after I confirm there’s no interference.
0 2025/08/29 22:17:49
Something like this.
Something like this.
0 2025/08/29 22:17:40
Here’s where the hole ends up inside the case, above the boss for the sixth gear shift rod, if that’s what this is.
Here’s where the hole ends up inside the case, above the boss for the sixth gear shift rod, if that’s what this is.
0 2025/08/29 22:17:52
Showing a broader orientation picture. The fluid level, by my reckoning (proof later) should be maybe around the bolt hole to the right of the pin.
Showing a broader orientation picture. The fluid level, by my reckoning (proof later) should be maybe around the bolt hole to the right of the pin.
0 2025/08/29 22:17:36
Plenty of wrench clearance.
Plenty of wrench clearance.
0 2025/08/29 22:17:45
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