4l80e compatability/process in GENIII
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Launching!
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4l80e compatability/process in GENIII Hey Guys
Finished my front end IFS swap. And putting in a explorer 8.8 rear here soon. After that will be onto engine and transmission. Been looking at segment swaps and process threads but stuff has changed since the original threads (2007) were created and hard to follow.
I have downgraded my initial power plans due to funds and time ...... and am basically looking to swap a GENIII 4.8/5.3 into the truck along with a 4l80e from a separate donor truck. Keep stock for now. So some questions.
1) Purchase said engine and full ECM/PCM harness - salvage yard. Get entire ECM/PCM harness. Or buy a new one.
https://bp-automotive.com/product/dr...-swap-harness/
2) Purchase 4l80e and Flexplate from salvage yard.
Sounds like any year 4l80e will pretty much work ..... there might be a difference in # bolt holes ? to the bellhousing - not sure.
3) Buy HPTuners VCM for segment swap. Contact HPT for segment software to match original engine truck OS ID.
4) Buy a conversion harness to save repin. http://www.nelsonperformance.com/80e-conversion-harness
5) Flash everything (4l80e and segment).
Anything else ?
Thanks
John
Finished my front end IFS swap. And putting in a explorer 8.8 rear here soon. After that will be onto engine and transmission. Been looking at segment swaps and process threads but stuff has changed since the original threads (2007) were created and hard to follow.
I have downgraded my initial power plans due to funds and time ...... and am basically looking to swap a GENIII 4.8/5.3 into the truck along with a 4l80e from a separate donor truck. Keep stock for now. So some questions.
1) Purchase said engine and full ECM/PCM harness - salvage yard. Get entire ECM/PCM harness. Or buy a new one.
https://bp-automotive.com/product/dr...-swap-harness/
2) Purchase 4l80e and Flexplate from salvage yard.
Sounds like any year 4l80e will pretty much work ..... there might be a difference in # bolt holes ? to the bellhousing - not sure.
3) Buy HPTuners VCM for segment swap. Contact HPT for segment software to match original engine truck OS ID.
4) Buy a conversion harness to save repin. http://www.nelsonperformance.com/80e-conversion-harness
5) Flash everything (4l80e and segment).
Anything else ?
Thanks
John
1&4) make sure to get an 80e harness or modify a 60e trans control connector and add a front VSS it's super easy and detailed here:
http://www.lt1swap.com/4l60e_4l80e_harness.htm
2) yes generally all are pretty compatible. I prefer the '94 and later models for the new style EPC. front or center lube it does not matter. center top bellhousing bolt hole does not matter.
my favorite donors are 96' and later 3500 fleet vans. I have snagged multiple road-worthy 80es from them. often they have GM reman trannies in them. drop the pan and see what it looks like.
does it look like heavy black friction material and smell like hot brakes? it might run, probably needs frictions, steels and maybe some hard parts.
does it look like the afterhours floor sweepings in a strip club with all sorts of glitter and chunks? pass. someone neutral dropped it or had a fondness for 4-2 power downshifts on the freeway.
is the fluid red and clear, no chunks? grab it. take the converter too. hold it on with some wire. take the range sensor and all the connectors and as much pigtail as possible. grab the mount. grab the hardware and dipstick tube. hell grab the gear selector cable and as much bracketry as possible. that stuff is invaluable.
the actual segment swap is so simple. just click and "save as" with a new name.
http://www.lt1swap.com/4l60e_4l80e_harness.htm
2) yes generally all are pretty compatible. I prefer the '94 and later models for the new style EPC. front or center lube it does not matter. center top bellhousing bolt hole does not matter.
my favorite donors are 96' and later 3500 fleet vans. I have snagged multiple road-worthy 80es from them. often they have GM reman trannies in them. drop the pan and see what it looks like.
does it look like heavy black friction material and smell like hot brakes? it might run, probably needs frictions, steels and maybe some hard parts.
does it look like the afterhours floor sweepings in a strip club with all sorts of glitter and chunks? pass. someone neutral dropped it or had a fondness for 4-2 power downshifts on the freeway.
is the fluid red and clear, no chunks? grab it. take the converter too. hold it on with some wire. take the range sensor and all the connectors and as much pigtail as possible. grab the mount. grab the hardware and dipstick tube. hell grab the gear selector cable and as much bracketry as possible. that stuff is invaluable.
the actual segment swap is so simple. just click and "save as" with a new name.
Thread Starter
Launching!
Joined: Sep 2016
Posts: 254
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1&4) make sure to get an 80e harness or modify a 60e trans control connector and add a front VSS it's super easy and detailed here:
http://www.lt1swap.com/4l60e_4l80e_harness.htm
http://www.lt1swap.com/4l60e_4l80e_harness.htm
Or do you mean there is a seperate harness. Thought it was just the one main EMC/PCM harness.
2) yes generally all are pretty compatible. I prefer the '94 and later models for the new style EPC. front or center lube it does not matter. center top bellhousing bolt hole does not matter.
my favorite donors are 96' and later 3500 fleet vans. I have snagged multiple road-worthy 80es from them. often they have GM reman trannies in them. drop the pan and see what it looks like.
does it look like heavy black friction material and smell like hot brakes? it might run, probably needs frictions, steels and maybe some hard parts.
does it look like the afterhours floor sweepings in a strip club with all sorts of glitter and chunks? pass. someone neutral dropped it or had a fondness for 4-2 power downshifts on the freeway.
is the fluid red and clear, no chunks? grab it. take the converter too. hold it on with some wire. take the range sensor and all the connectors and as much pigtail as possible. grab the mount. grab the hardware and dipstick tube. hell grab the gear selector cable and as much bracketry as possible. that stuff is invaluable.
the actual segment swap is so simple. just click and "save as" with a new name.
my favorite donors are 96' and later 3500 fleet vans. I have snagged multiple road-worthy 80es from them. often they have GM reman trannies in them. drop the pan and see what it looks like.
does it look like heavy black friction material and smell like hot brakes? it might run, probably needs frictions, steels and maybe some hard parts.
does it look like the afterhours floor sweepings in a strip club with all sorts of glitter and chunks? pass. someone neutral dropped it or had a fondness for 4-2 power downshifts on the freeway.
is the fluid red and clear, no chunks? grab it. take the converter too. hold it on with some wire. take the range sensor and all the connectors and as much pigtail as possible. grab the mount. grab the hardware and dipstick tube. hell grab the gear selector cable and as much bracketry as possible. that stuff is invaluable.
the actual segment swap is so simple. just click and "save as" with a new name.
Does the rest bolt right up - I read somewhere about having to get a custom convertor and/or spaceer made with right bolt holes for flexplate ......but it didnt explain why. Not sure if this was comparing LS versus vortec for example.
https://ls1tech.com/forums/automatic...l80e-swap.html
https://ls1tech.com/forums/conversio...confusion.html
Thanks for the info Doug.
#1 just be sure to specify to your harness maker which transmission you will use and which range sensor ( older 2 plug, or newer 1 plug) and you're set.
#2 well all 80e's use the "legacy" or older gen 1 and gen 2 converter spacing. so to use it behind any LS motor you will need the correct flexplate and spacer if you are using the stock converter.
#2 well all 80e's use the "legacy" or older gen 1 and gen 2 converter spacing. so to use it behind any LS motor you will need the correct flexplate and spacer if you are using the stock converter.
Thread Starter
Launching!
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Think that's the part I'm confused about - the "loose" term of LS motor.
If its going behind a true LS1 for example understand it needs a spacer so the convertor can mate properly with the input shaft due to short crank
But this would be a 5.3 engine off a truck/van/suv.
4l80e likely off same - but a different vehicle (not too may OEM 4.8/4l80e)
etc
So straight bolt up .......or need different flex plate ..... or different convertor ......
If its going behind a true LS1 for example understand it needs a spacer so the convertor can mate properly with the input shaft due to short crank
But this would be a 5.3 engine off a truck/van/suv.
4l80e likely off same - but a different vehicle (not too may OEM 4.8/4l80e)
etcSo straight bolt up .......or need different flex plate ..... or different convertor ......
Thread Starter
Launching!
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Ok finally found a page that I think describes it.
Looks like I need the adapter
https://www.cartechbooks.com/techtips/ls-swaps-transmission-and-clutch-guide/
Way I read it
Need the spacer for the crank convertor gap due to short crank
Need the flexplate for older style bolt pattern
Looks like I need the adapter
https://www.cartechbooks.com/techtips/ls-swaps-transmission-and-clutch-guide/
Way I read it
Need the spacer for the crank convertor gap due to short crank
Need the flexplate for older style bolt pattern
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consider all ls1/2/6 and gen3/4 truck motors the same thing. dont get hung up on the oddball short crank motors, it's unlikely you will see many. i've seen only one personally and I've looked at ~100 or so car and truck motors.
yes you will need the adapter and the flat flexplate with the 11.5" bolt pattern
yes you will need the adapter and the flat flexplate with the 11.5" bolt pattern
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Launching!
Joined: Sep 2016
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Thanks Doug.
Very useful clearing this deal up for me.
Do you happen to know if you can use the existing 4l80e flexplate and spacer that comes from factory ?
Or just better buying new flexplate/spacer.
Thinking if have to by new ...... might be better putting that $100 to an new $650 CIRCLE convertor with right size snout/bolt patterns.
Very useful clearing this deal up for me.
Do you happen to know if you can use the existing 4l80e flexplate and spacer that comes from factory ?
Or just better buying new flexplate/spacer.
Thinking if have to by new ...... might be better putting that $100 to an new $650 CIRCLE convertor with right size snout/bolt patterns.
