Ok, so I tried swapping in a '89 M/T turbo gauge cluster into my '90 A/T NA chassis. I couldn't get ANY of the gauges to work. I had an extra '89 gauge cluster and tried it with the same results. I put the '90 A/T NA cluster back in and everything works except the tach and speedo (suspect the cable or tranny gear). This is after I swapped in a '89 7MGTE R154 in place of a 7MGE W58. First question -- any reason why the '89 gauge clusters won't work? The plugs all plugged in the same. Second question, any idea why my tach doesn't work with the CPS, but worked fine with a distributor?