4.6l northstar transmission - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-10-2015, 07:35 PM   #1
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Default 4.6l northstar transmission

To start off I'm replacing the transmission on a 04 bonneville gxp which has a 4.6l northstar with 4t80e transmission vin Y. So then I went to the junk yard asking for a transmission to a 04 Cadillac deville vin Y, being that bonneville gxp are hard to come buy. When I brought it home and compared the transmissions I noticed the connectors are different the bonneville gxp has 17 pins on the connector and the deville has 16 pins on the connector. Any help would be greatly appreciated.
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Old 12-14-2015, 01:23 AM   #2
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Looks like you're in for a head ache. If I were you, I would pull the trans pan off (gxp) and try to trace down the 17th pin wire......what ever part it connects to, I would remove it, test it and install it into the Cadi trans. With any luck, it would be connected to a simple pressure switch of some sort.....and with more luck, the Cadi trans would have a removeable bolt plug in that same location that you can take out and install the gxp sensor......good luck.
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