4L60E to 4L80E Wiring Swap
01-28-2010, 12:36 PM
#91
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you can purchase it from several places, but the point of this sticky is showing you can do it yourself and save $150+.
02-09-2010, 04:36 PM
#92
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i just bought a junk 97 1 ton with a 5.7/4l80e for $350 to use the computer,harness and tranny for my 96 since i've blown my 4l60e 6 times now. what i wanna know is can i just modify my harness or should i swap the 97's computer and harness into my truck which was the original plan until i saw the harness was cut in half 12" from the computer
05-21-2010, 01:11 AM
#94
4L80e Shifts too hard
A little tid bit for you:
If your 1-2 up shift seems way too hard, double check the wiring of the aditional VSS (closest to the bellhousing). My pins weren’t seated in the harness all the way and when I connected the PCM they didn’t make contact. This caused a fault (DTC P0717) that lead to full line pressure. Once I seated those two pins the trans shifted smooth as stock, and I have a shift kit installed.
If your 1-2 up shift seems way too hard, double check the wiring of the aditional VSS (closest to the bellhousing). My pins weren’t seated in the harness all the way and when I connected the PCM they didn’t make contact. This caused a fault (DTC P0717) that lead to full line pressure. Once I seated those two pins the trans shifted smooth as stock, and I have a shift kit installed.
05-21-2010, 10:21 AM
#95
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A little tid bit for you:
If your 1-2 up shift seems way too hard, double check the wiring of the aditional VSS (closest to the bellhousing). My pins weren’t seated in the harness all the way and when I connected the PCM they didn’t make contact. This caused a fault (DTC P0717) that lead to full line pressure. Once I seated those two pins the trans shifted smooth as stock, and I have a shift kit installed.
If your 1-2 up shift seems way too hard, double check the wiring of the aditional VSS (closest to the bellhousing). My pins weren’t seated in the harness all the way and when I connected the PCM they didn’t make contact. This caused a fault (DTC P0717) that lead to full line pressure. Once I seated those two pins the trans shifted smooth as stock, and I have a shift kit installed.
10-18-2010, 10:08 PM
#97
TECH Fanatic
tuneing for 80e
i was want ing to do the 80e swap,im just a bit confused with it.....all i need is tranny ,t/c, spacer,80e gear selector,hd dipstick,tranny mount,driveshirft(which one do i get for an rcsc?)...1350 yoke,99' pre rearend seal pcm 80e calibration,60-80e converison harness, n 8 qts den3.....when i get my truck tune can they tunr it for the 80e at the same time or what?how will i get the reflash done? if im wrong bout any of correct me plz......im getting my 6.0l n goodies here soon n wanting to get the 80e done at the same time so i would have to take all back a part do it once ,youknow less work
12-15-2010, 09:23 AM
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Just to clarify, the spliced in pigtail to add the new VSS connector runs to the front plug on the 4L80? The existing 4L60 VSS connector would then connect to the rearward plug?
12-15-2010, 09:27 AM
#100
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I'm dropping the LQ4/4L80 into a 1997 Extended cab short bed, 2wd. This truck was originally equipped with 5.7 Vortec and 4L60, and has the 2 piece driveshaft, stock. The 4L80 I bought came from a '99 with a 454 and still has the correct yoke attached. What, if any driveshaft mods will I need to make? I'm using the transdapt style motor plates that set the engine back about 3". I'm "thinking" that I can slide my original trans crossmember back and drill new holes, but not sure yet. Any help would be greatly appreciated!!
