4l80e swap codes
05-17-2012, 07:59 PM
#1
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4l80e swap codes Put in a 99 PCM in a 98 trans am, did a repin of the harness, did a 4l80e swap out of a 2000 2500hd with 105k, getting codes p0748 an p0758,!the car takes off in second an will not shift to first, or will it shift to first manually........ Any IDEAS!!!!!
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05-21-2012, 10:40 AM
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This is a buddy of the OP. He bought the wiring adaptor from speartech that was plug and play. Is this still needed to swap the pinouts at the trans?
Last edited by onebaddmax; 05-21-2012 at 01:11 PM.
05-21-2012, 02:24 PM
#12
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05-21-2012, 09:53 PM
#14
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You will have to check the harness by checking continuity between the PCM connector(s) and the trans connector to make sure it is wired right... you will need wiring diagrams for PCM used on a 4L80E platform and for 4L80E trans connector also.
05-22-2012, 08:45 PM
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Problem solved. Turned out to be when one of our other buddies helped us throw the trans in he had plugged in the connector upside down. Too many cooks in the kitchen.....but on a side note, this thing whines loud in first gear and from what I read it's normal, but why?
01-01-2014, 09:20 AM
#17
Problem solved. Turned out to be when one of our other buddies helped us throw the trans in he had plugged in the connector upside down. Too many cooks in the kitchen.....but on a side note, this thing whines loud in first gear and from what I read it's normal, but why?
03-28-2014, 09:48 AM
#18
Problem solved. Turned out to be when one of our other buddies helped us throw the trans in he had plugged in the connector upside down. Too many cooks in the kitchen.....but on a side note, this thing whines loud in first gear and from what I read it's normal, but why?
