6L80e 6spd Conversion

[Ryan212]

Yes between pins 6 and 14 for the termination resistor

Ryan

 

[adventr]

Well, either Amazon or FedEx dropped the ball somewhere. I selected and paid for Overnight Saturday delivery, but the tracking shows that it won't be delivered until Monday. So, a little more waiting. Lol

Looking forward to getting this thing wrapped up so that I can move on to other cool H3 projects

 

[Kick'n Dust]

I just bought my 3 a couple of years ago. I've done a handful of mods to it since. I like what your attempting, but I think I'll keep it simple. Even though my 3 is being built as an expidition vehicle, and could benifit from the gear ratios of a 6l80e, a 4 speed is a well proven setup. One of the biggest problems us 3 owners have is the lack of aftermarket support. Your 6 speed will be pretty awesome and unique when it's done, but I'll stick with whatever has the best aftermarket support.

Keep it up though! Any kind of mods for the H3 that are being developed is great for all of us. Maybe one day the aftermarket will notice us H3 owners.

 

[CaseyS]

Maybe one day the aftermarket will notice us H3 owners.

Don't hold your breath. That day is long gone.

 

[adventr]

I just bought my 3 a couple of years ago. I've done a handful of mods to it since. I like what your attempting, but I think I'll keep it simple. Even though my 3 is being built as an expidition vehicle, and could benifit from the gear ratios of a 6l80e, a 4 speed is a well proven setup. One of the biggest problems us 3 owners have is the lack of aftermarket support. Your 6 speed will be pretty awesome and unique when it's done, but I'll stick with whatever has the best aftermarket support.

Keep it up though! Any kind of mods for the H3 that are being developed is great for all of us. Maybe one day the aftermarket will notice us H3 owners.

It's pretty typical to run into issues like these when tackling something that hasn't really ever been done before. I think that once I can get everything ironed out, it'll be a viable option for those not wanting to stick with the 4L60e (for whatever reason).
After doing some more research on the TCM problem that I ran into, I can say that if you find a 2009 and lower 6L80e, you shouldn't have the bricking issue that I ran into. If all you can find is 2010+ transmissions, then just plan on swapping in the new valvebody/tcm before you install the trans into your vehicle.

I believe that the 6L80e will prove to be reliable.


As far as the aftermarket for H3s....well, you're looking at it. The guys on this forum are probably the only ones that will be making parts from here on out!

 

[Kick'n Dust]

Well you got my attention. Keep us posted

 

[adventr]

Good news. Got the new valvebody/TCM in the mail today. Took it up to my buddy's house this evening and put it on the bench.

Used the same 2009 Denali VIN number that bricked my other TCM, and this time it worked perfect. Took like 60 seconds and it was done with NO ERRORS. Lol

Thankful that he has the setup to do all that! Don't know what I would have done without it.



I'm swapping out the old valvebody with this one tomorrow evening, and I'll update with results. Hopefully it goes smoothly.

 

[High Five H2]

UGH why can't this all be done in one day??? the suspense is killing me.

 

[rsc]

^^^ What he said.

 

[adventr]

LOL!

My projects are rarely quick, and typically end up taking 2-3x longer than what they should!

 

[High Five H2]

one side of me says to quit whining because doing it right takes time, the other side wants you to take a few sick days and stop sleeping until it's done.

also, I figured out the formula for how long a project will take: add 3 hours to your estimate and multiply by 3. that's pretty close.

 

[amrg]

^^^ What he said.

+1!

 

[Schwarttzy]

I can't tell you how many times in the Mountains I wanted a gear between 3rd and 4th. Excited to see where this goes.

 

[Ryan212]

I was thinking about your swap earlier.

You may have to change the trans type in the ECM calibration. There is a value of 0005 in the ECM that may need to be changed to a 0083 (decimal 131 for 6L80) to change from 4L60/65/70 to 6L80. I do not see that parameter in hptuners.

That could explain the no forward gears with the newer TCM and you may have the same issue with the new TCM as well.

Ryan

 

[High Five H2]

Doesn't TBMS have all the programming figured out already? Are you just doing it yourself to save money?


Sent from my iPhone using Tapatalk

 

[Ryan212]

Good point. Hopefully they have already done that change.

 

[adventr]

I was thinking about your swap earlier.

You may have to change the trans type in the ECM calibration. There is a value of 0005 in the ECM that may need to be changed to a 0083 (decimal 131 for 6L80) to change from 4L60/65/70 to 6L80. I do not see that parameter in hptuners.

That could explain the no forward gears with the newer TCM and you may have the same issue with the new TCM as well.

Ryan

Ok thanks. If this new tcm does the same thing, I'll look into that part. Hoping it just works this time, but if not, that will give me a place to start anyway.
Were you seeing that value in EFI Live or something?

Doesn't TBMS have all the programming figured out already? Are you just doing it yourself to save money?


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Unfortunately it's not that simple. I've been working directly with TBMS through this whole swap. He's just not done enough of these yet, to account for all the variables. We're both kinda figuring our way through this project.
According to him, tossing this new VB in the trans with a 2009 OS on it, should just work.

 

[Ryan212]

It is defined in my tuning software but I looked in the binary for it.

EFI Live displays the trans type, but it is not editable.

 

[adventr]

No time for much of an update, but it's going now.

New tcm fixed it. The one I pulled out was in fact a different part number.

Drove it a block up the street and back. And did a burnout in the parking lot. Lol

 

[Ryan212]

Awesome. Want to sell the old tcm I can always use one for the bench.

 

[adventr]

Awesome. Want to sell the old tcm I can always use one for the bench.

Yeah sure, I have no need for it.

Also, sent you a PM the other day. I don't see PMs when I log on with my phone (90% of the time) so just a heads up.

 

[Ryan212]

Thanks

i'll respond this weekend when i can do some research.

 

[High Five H2]

So what's left to do?


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[adventr]

Quick video of driving showing just some light acceleration. Nothing special, but it works!


https://youtu.be/NjcDd5-TQLw

 

[SedonaBound]

A really impressive project. Suggestion for the next project: paddle shifter!