Hi,
The rear differential doesn't make sense to me. The vehicle speed sensor (VSS) is normally in the transmission housing. See pic below.
Check to see if you can locate that on the new transmission. Keep in mind, I have no idea what year or model transmission was used, so what I'm telling you may be wrong. However, I know there are speed sensors used on the differential housing for the ABS system, but not so sure about the speedometer.
Let me know. Note that the transmission in the pic is an automatic. However, the manual transmission should have one in the same area.
Let me know what you find.
Joe
See pic below.
Image (Click to make bigger)
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Tuesday, April 18th, 2023 AT 8:39 PM