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kcoke

Tranny Swap. How to get the speedo correct?

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Ok So I swapped a 1979 280zx 5 spd in the 71 240z. How do I get the speedometer to be accurate since the gear ratios are different now?

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The speedo gear is matched to the rear-end gearing. So just use the speedo gear out of your stock 4spd. You may have to swap the speedo gear carrier... using the gear itself from your original 4spd., but put in the ZX speedo gear carrier. As I recall there is a "pin" that holds the speedo gear in the speedo gear carrier. (the carrier bolts into the transmission - and speedo gear is inside the carrier).

If you have changed the rear gear ratio - then you need a speedo gear to match it.

FWIW,

Carl B.

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