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That makes alot more sense as it was on the stock tune when i had seen it. It wasn't a huge pull if i remember correctly so that would be right in line.
Ill be moving to an lt setup eventually but...

That's kinda what i figured was happening. I know the timing it pulled to doesn't match the main spark tables, without the log I couldn't say for sure what it was doing on that end. At my power...

So you just replied to insult someone's intelligence and weren't actually interested in the log and tune or being helpful in the first place right?

You seem like a real good dude...

Anyhow.....

here you go buddy! I appreciate the positive words although i know my intellect suffers due to blood flow redirection to my huge b****.

While i know you are most likely correct, before i completed...

I have a 2005 ctsv with an 8l90 swap and I'm curious if there is a way to get the pcm to pull timing on shifts? At the moment I'm running the stock os and a manual trans segment on the p59. I am able...

Wanted to report back to end this thread. I changed my throttle position input to my tps sensor like it should've been, redid the torque table and kept the glove box open and I'm about 4 days trouble...

It could be a short, voltage issue or the tcm2650 causing it as well. It was extremely hot to the touch so I'm sure the processor is baking.

I'm going to do maintenance on the 8l90 but I'll be...

I think I may have figured this one out. I'm not 100% sure on it yet but I have the tcm 2650 and t87 mounted in my glove box and never gave it a second thought.

I went to grab something and the...

Well none the less I do appreciate all the input. Unfortunately I'm one of the few who has done it so there isn't much info. I did look at solenoid command charts for the gears and I see what you...

Ill have to see if it happens again ill log it anytime i drive it. at this point im a little unsure of what to think on it but with the way this swap has went i think its time to move on from the tcm...

Well the issue happened again today in the same way. Cruising 70mph fell into neutral condition and had to slow to a stop on the highway. Went into gear around 15 mph and started downshifting.

I...

Thats what I figured honestly. It's another issue that I can't seem to find info on with a regular gen 5 setup too.

I won't be getting a log of it anytime soon as it's only happened twice and...

well, i spoke too soon. The original issue i hasn't occurred again but this time i was cruising at a steady state with no fluctuations and suddenly i dropped completely into neutral and just free...

When i did flash the t87 i entered in the correct tun data and was able to get it to complete the flash, In the tech tool it does show valid under solenoid program data as well.
Ive double checked...

Are the 8l90s internally the same between the camaro ss and the silverado, sierras, etc..? I know tailhousing is different but can't find any other info.

I ask because the transmission is from a...

ok i appreciate the help. Ill do what i can before i pull the engine for a gen 5 setup!

edit: i changed torque converter and shift scheduling back to a stock settings, then adjusted them for 26.7...

alright well that's good to know then. Its possible the torque table i have setup for the transmission isn't correct because as far as the t87 tune goes to me everything has seemed fine so far. I...

I have a 2005 ctsv with an 8l90 swapped in using a tcm 2650 with 3.73 rear gears. For the most part the car has been doing great and has been issue free, but i do have a reoccurring issue I can't...

that really helps out a ton i do appreciate the info. Everything is starting to make a little more sense for sure!

thank you for that. I did some reading on the s4 wiki also and it seems like alot transfers over to hp tuners, you just have to find the corresponding table. But from what i've read it seems you are...

I have a 2008 vw gti that is stock at the moment and was wanting to really dig into it, but noticed my desired lambda was dropping as low as .71.
The pe fuel table is set pretty lean and I have ran...

Is it possible to tune out first gear entirely on the t87? My setup is running 3.73 gears and it's extremely hard to get the 1-2, 2-1 happy part throttle, and first is pretty much useless at wot so I...

I am trying to swap to a different OS on my standalone 8l90 t87 setup from a silverado os to a camaro/corvette os so i can have the proper tutd settings.
Does anyone have a TCM readout only from a...

I ended up modifying the shifter to move into sport and it works as it should now. I tried everything but a write entire os flash!

I have a 2016 silverado 8l90e swapped into another vehicle using the matching t87 tcm. I have the transmission working in every way i want except for tapshift/manual mode. On the camaro and corvette...