Re: Tbi swap build thread
Depending on which 88 (NBS = pickup) you got it from the trans may supply pulses to the ECM which then filters it to run the speedo. The other version (OBS = burb/blazer) uses cable drive speedo with a VSS output box hung on it. Either way you need the appropriate input. Old style uses 4000 pulse per mile and the new one uses like a 132,000 signal divided and dropped down for various systems. There were a couple years of crossovers where Burbs has cable drive trans rather than electronic outputs. Need to make sure your trans/dash/ecm all play together.
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1987 2 ton
1982 250/TH350 beater in progress
Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping
Plus a mess o' tractors
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