LT1-LT4 Modifications 1993-97 Gen II Small Block V8

93 4l60e

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Old Jan 19, 2015 | 09:39 PM
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kodalee's Avatar
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Default 93 4l60e

I have a 93 z 28. How do I re cal my speedo
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Old Jan 20, 2015 | 09:36 AM
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93M6Formula's Avatar
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Your '93 doesn't have a 4L60E, it is the non electronic 4L60/700R4.

Two ways to do it on a '93.
1. Replace the speedo gear in the trans (Auto only), which are getting hard to find and aren't always accurate for custom setups.
2. Get a calibration box and wire it in between you speedometer wire and the VSS. This is the best option because you can calibrate it to be exact for whatever your setup is. This is what I did in my car.

This is what I used and it's great.
http://www.summitracing.com/parts/dak-sgi-5/overview/
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Old Jan 20, 2015 | 08:04 PM
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Might also consider changing to a 94-95 pcm which is easier to reprogram and I think would deal with the speedo issue, give you heated O2s and MAF if you want it.
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