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Sorry, it's a sonnax model 44957-LB2 45-545RFE
it was on my 05 4.7 Dakota with 45RFE transmision. It's a elecric line pressure boost. Simply unplug the harness from your pressure sensor and add this in line. Eg: Plug the harness into the sonnax and plug the sonnax into the sensor, takes 2 minutes. cost was $39.95 new plus shipping, I'll take $25 plus shipping.