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TravisMartin · 10-25-2009, 03:10 AM

I've been following this thread with interest as I'm going to convert my '82 C20 to TBI and maybe a 4L80E at some point, plus I'm already gathering parts to convert my '90 R3500 crew cab to a 4L80E...it is factory equipped with 454 TBI, but want to add 4L80E as if it were a '91...

RF, do you have any info with regard to the 4L80E? I'm pretty comfortable with the TBI side of things, but haven't had a 4L80E equipped truck to play with yet. Is the 4L80E controlled by the same ECM as the TBI, or is there a separate controller? I'm told that 91 up diesel trucks had a stand alone converter, but have been assuming they integrated the transmission control into the TBI on the 91 gas burners.

Thanks,

Travis

10-25-2009, 03:10 AM	#354
TravisMartin Curmudgeon of Poor Means Join Date: Jan 2009 Location: Lubbock, Texas Posts: 113	Re: Tbi swap build thread I've been following this thread with interest as I'm going to convert my '82 C20 to TBI and maybe a 4L80E at some point, plus I'm already gathering parts to convert my '90 R3500 crew cab to a 4L80E...it is factory equipped with 454 TBI, but want to add 4L80E as if it were a '91... RF, do you have any info with regard to the 4L80E? I'm pretty comfortable with the TBI side of things, but haven't had a 4L80E equipped truck to play with yet. Is the 4L80E controlled by the same ECM as the TBI, or is there a separate controller? I'm told that 91 up diesel trucks had a stand alone converter, but have been assuming they integrated the transmission control into the TBI on the 91 gas burners. Thanks, Travis