4l85 swap into 00 Tahoe with cammed 6ltr issues

[bottomline2000]

OK, I've been trying to work out the bugs on this swap. I honestly only have one issue of no TCC lockup..
Background-
0411 pcm swap from 02 Escalade- fan control issues with stock pcm.
Trans is a 4l85 from an 08 Chevy express van
Transgo shift kit with sonnax boost pressure relief valve instead of transgos
Converter- Vigilante triple disc 3k stall
Speartech adapter harness with vss pigtail for 2nd speed sensor
New internal Trans harness and manual boost valve
Blackbear tuned with Autocal

I initially swapped the cammed 6ltr with 4l65 in and BB updated the tune via auto cal. Ran this combo for almost a year. No codes or anything. Blew the 4l65 and swapped in the 4l80 using the above parts. As soon as I loaded the 4l80 tune my Traction control light came on. I couldn't turn it off, just stay lit. After getting the fluids in the trans and doing some test drives everything seemed OK except the TC light. On my 3rd start I get check engine light and codes PCM 1810 and ABS CO279. I can clear the codes but they come back on 3rd start. Since the truck seemed to be driving normal I decided to take it thru all the gears. 1-2 shift is smooth and solid as well as 2-3, but as soon as it tries to lock the converter it shudders in and out of OD. This is the only drivability issue I have which is big.

Spoke to Justin about the problem and he thinks it's the abs computer, but I can swap the original 6.0 tune back and the traction control light will turn off. The only code I found for abs co279 is a JL4 ABS issue which my truck doesn't have the JL4 option.

Since I didn't splice any wires and only added 2 pins to the pcm I'm confident I didn't screw up the install.

Anyone have any feedback on this because the 80e is a beast of a transmission and I love how it shifts. Just need this issue resolved.

Some pics for attention lol..

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[6speedblazer]

i would suspect a bad tune.

talk to justin at BBP and see what he did. I bet he used a stock 6.0L/4l80e combo tune out of god knows what. when he needed to start with your base tune and do a 4l80e segment swap. or you can keep the 60e segment and run a relay harness to control the 4l80e.

 

[TxTooTall]

I used the same harness on an 08. It was a 5.3 and 4L60e combo. I also did the 80e swap.

I tried using the segment swap option in HPT but I had starting/running issues.

I flashed another 6.0/80e tune that I knew worked and that solved my issue.

If your tune works with the ABS sensor, then use that tune, or load another tune file with the 80e option and TTC.

 

[bottomline2000]

I used the same harness on an 08. It was a 5.3 and 4L60e combo. I also did the 80e swap.

I tried using the segment swap option in HPT but I had starting/running issues.

I flashed another 6.0/80e tune that I knew worked and that solved my issue.

If your tune works with the ABS sensor, then use that tune, or load another tune file with the 80e option and TTC.

The tune is actually my base tune with an 80e segment swap. My segment swap is from an 8.1/80e combo. I advised him my 6.0 came from an 02 burban that had an 80e. So your using a factory tune instead of a segment swap? What tune did you end up using?

i would suspect a bad tune.

talk to justin at BBP and see what he did. I bet he used a stock 6.0L/4l80e combo tune out of god knows what. when he needed to start with your base tune and do a 4l80e segment swap. or you can keep the 60e segment and run a relay harness to control the 4l80e.

He sent me a tune update changing my wheel size back to stock and now my traction control light is off..1 win! I now only have dtc pcm1810 showing up. I emailed Justin about this as well. I have a new internal harness and manual switch valve. It cycled thru the gears once great and locked the converter. Went down the hwy no problem. I shut it off to get gas and the code pops up. No more converter lockup.

I would like this thing to lockup around 45mph if possible but it currently wants to lock at 55mph which sucks around town, not that it's locking at all now. I wanted to avoid the relay method to keep this simple as possible and behave like my 60e did in O/D. Hopefully this is possible.

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[Rocket Man]

I hope you get this resolved. Following.

 

[bottomline2000]

I hope you get this resolved. Following.

Thanks Red there was clearly some details left out about this swap. One of the biggest is with a segment swap if you let off the throttle it kicks out of O/D. basically u find yourself speeding everywhere you go to keep the converter locked. Hptuners has a fix for throttle position at 0% so I hope efi live does too. Justin lowered the lockup mph but it won't stay locked.

I need to drop the pan again and replace the new manual valve switch again I guess. Glad i put a drain plug on this pan. My original switch looked fine but I had the code with it too but it went away. I replaced it as preventative maintenance. So much for that.

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[Rocket Man]

That's also what I was reading about when doing that swap, there seems to be some issues that crop up on some but not all. I guess you'll be an expert soon, or at least an expert on tearing it apart and pitting it back together! I just got an updated tune from Justin for my new trans today, as well as the trans and flexplate. The converter is behind schedule and won't be here until Thursday, then I get to put this beast back together. I can't wait to see what a real trans will feel like with my blower. Plus he said I'm fine for 3 more lbs. of boost so I'll order a smaller pulley for the Whipple.

 

[6speedblazer]

Thanks Red there was clearly some details left out about this swap. One of the biggest is with a segment swap if you let off the throttle it kicks out of O/D. basically u find yourself speeding everywhere you go to keep the converter locked. Hptuners has a fix for throttle position at 0% so I hope efi live does too. Justin lowered the lockup mph but it won't stay locked.

I need to drop the pan again and replace the new manual valve switch again I guess. Glad i put a drain plug on this pan. My original switch looked fine but I had the code with it too but it went away. I replaced it as preventative maintenance. So much for that.

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0% throttle unlock is very annoying. Thats one thing i fix in all the tunes i do.

HPtuners now has the tables to resolve that issue.

 

[TxTooTall]

The tune is actually my base tune with an 80e segment swap. My segment swap is from an 8.1/80e combo. I advised him my 6.0 came from an 02 burban that had an 80e. So your using a factory tune instead of a segment swap? What tune did you end up using? He sent me a tune update changing my wheel size back to stock and now my traction control light is off..1 win! I now only have dtc pcm1810 showing up. I emailed Justin about this as well. I have a new internal harness and manual switch valve. It cycled thru the gears once great and locked the converter. Went down the hwy no problem. I shut it off to get gas and the code pops up. No more converter lockup.

I would like this thing to lockup around 45mph if possible but it currently wants to lock at 55mph which sucks around town, not that it's locking at all now. I wanted to avoid the relay method to keep this simple as possible and behave like my 60e did in O/D. Hopefully this is possible.

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I used the tune from an 07-09 Express van

my setup was for a gen4

I would suggest that you go back to your old tune
have that tune file changed in the transmission tables to the 80e option, and not go with a "segment swap" file
It's a drop down option now, no custom OS or segments needed any longer

 

[bottomline2000]

I used the tune from an 07-09 Express van

my setup was for a gen4

I would suggest that you go back to your old tune
have that tune file changed in the transmission tables to the 80e option, and not go with a "segment swap" file
It's a drop down option now, no custom OS or segments needed any longer

I have 3 problems.

1. I'm tuned with Blackbear.
2. He uses EFI Live.
3. Mine is a gen 3

I may be looking at a new tuner altogether. HP tuners seems to be better setup for this swap. I`m having to go back to him for every little adjustment and it's still not right. I found someone with the exact same issue and it was resolved but they are using hp tuners..tuning was supposed to be the easy part.

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[6speedblazer]

I used the tune from an 07-09 Express van

my setup was for a gen4

I would suggest that you go back to your old tune
have that tune file changed in the transmission tables to the 80e option, and not go with a "segment swap" file
It's a drop down option now, no custom OS or segments needed any longer

it does not work like that in HPtuners. still need a segment swap to go from a 60e to an 80e.

you are correct, there is a drop down box that lets you select 60 or 80, but its not as simple as just that.

 

[6speedblazer]

I have 3 problems.

1. I'm tuned with Blackbear.
2. He uses EFI Live.
3. Mine is a gen 3

I may be looking at a new tuner altogether. HP tuners seems to be better setup for this swap. I`m having to go back to him for every little adjustment and it's still not right. I found someone with the exact same issue and it was resolved but they are using hp tuners..tuning was supposed to be the easy part.

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nothing against Justin or anyone at BBP, but issues like you are describing are exactly the reason i bought HPtuners and began to do my own tuning.

 

[bottomline2000]

nothing against Justin or anyone at BBP, but issues like you are describing are exactly the reason i bought HPtuners and began to do my own tuning.

Yeah that's how I started doing my own wrenching. I'm sure I could figure it out, but wanted something fool proof and quick. Now I find myself doing all the research to tune the damn thing.

One thing on the segment swap. Does the segment swap need to match the year 4l80 because I have an 08 (last year they made them I believe)? I know there is a difference in trans harnesses from 04 up and the OS plays a part too. Mine is actually a 4l85 but that shouldn't matter for tuning purposes.



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[6speedblazer]

Yeah that's how I started doing my own wrenching. I'm sure I could figure it out, but wanted something fool proof and quick. Now I find myself doing all the research to tune the damn thing.

One thing on the segment swap. Does the segment swap need to match the year 4l80 because I have an 08 (last year they made them I believe)? I know there is a difference in trans harnesses from 04 up and the OS plays a part too. Mine is actually a 4l85 but that shouldn't matter for tuning purposes.



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im not sure on the internal workings of the trans and what changed when, but your 4l80e segment would have to be from a tune with the same OS# as your current 6.0/4l60e tune.

 

[bottomline2000]

I think I have narrowed down my last dtc code of pcm1810 to a missing 4l80 diagnostic segment from my tune. I'm trying to verify with BB if this part of the segment swap was completed. By definition this code should not be able to set the check engine light with the 4l80 so it must be the problem. Found this info on the efi live forum from another members post..explains my issue..

"I just got back from a drive. I logged the PIDs you requested and the pressure switches all worked fine. I didn't get the P1810 this time. As I think back, I got the P1810 before I swapped in the 4L80E diagnostic segment. I forgot that initially I just plugged the trans segment in and hauled ass. I don't know if it's a coincidence, but the P1810 hasn't come back since I swapped the proper diagnostic segment in."

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[bottomline2000]

Well the good news is the above 80e diagnostic segment swap was reflashed by Justin and he sent me the updated tune. After loading it no more check engine light. The trans shift much better, it runs cooler and the converter locks. It still unlocks when u let off the gas but that is expected until I get a patch in the tune.

I will say the 10.5 converter makes the truck feel faster. After getting everything working right the 3k stall feels good. It felt too loose before. It's got me questioning if I need 4.10 gears.

Gonna wait for the fuel shortage to pass the DFW area and the do some speed runs thru Mexico;-)

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[Rocket Man]

Glad to hear good news finally. I also have some- after breaking a u-joint strap the day after getting my trans installed and then t-boning an idiot who whipped out in front of me on my bad-ass bagger, I finally got my truck back on the road, my bike in the shop, and my body started healing. I haven't had much time driving yet but I agree with the 10.5 converter. I have a 2800 stall but my truck definitely feels faster too. I am trying to keep things easy right now since the last time I did a full launch the front driveshaft was left dangling. Plus I'm a bit broken up.

 

[bottomline2000]

Glad to hear good news finally. I also have some- after breaking a u-joint strap the day after getting my trans installed and then t-boning an idiot who whipped out in front of me on my bad-ass bagger, I finally got my truck back on the road, my bike in the shop, and my body started healing. I haven't had much time driving yet but I agree with the 10.5 converter. I have a 2800 stall but my truck definitely feels faster too. I am trying to keep things easy right now since the last time I did a full launch the front driveshaft was left dangling. Plus I'm a bit broken up.

Haha, Red I think we both went thru the ringer getting our trucks back running. My wife and I both had trips to the ER during my swap. Turned out to be nothing more than kidney stones for both of us..been married too long lol.

I was watching your thread while having a minor nervous breakdown trying to get mine going. Good to see u got it running and only got banged up from the wreck. People just don't pay attention and it pisses me off to no end. Let that recovery run its course and you be back out in due time.

I finally get to start working on my interior. Got a full 2 tone katzskin interior that needs to go in and some surgery on my stereo and led lighting.. It never ends lol.

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