I'm trying to verify it will work before buying it. I am getting to the point where I have to make a decision for a project. Either I go with a lightly supported Gen5 engine and use an 8 or 10 speed transmission, or go with a heavily supported Gen4 engine and a 6 speed. Best outcome would be the LS3 and the 8/10 speed. I have an engine builder who can either modify a stock Gen5 block to make a 408cid engine, or can build a Dart block as a 427. The Dart block will handle the power much better, as can the 8/10 speed transmissions.Tazzi wrote:Probably best in its own thread.Horshack wrote:Assuming that is responding to my post. Supposedly they can speak to each other, but I only have the word of a harness maker on that, not a computer dude. Can't see why they wouldn't be able to, as the Gen 4 and Gen 5 both speak to the 6 speed. Presumably, if the Gen 5 can speak to both the 6 speed and the 8 speed, something between them must be similar enough that the Gen 4 can be made to speak to the 8 speed. But before I go any further, should I keep posting on this thread or start a new one? That post I quoted before made it look like this would be the place.Tazzi wrote:Yeah I dont think thats what those files are for.
If the TCM and ECM do not have compatible operating systems, then its not going to play nicely.
Would need to make a middle man module to translate the information to/from both TCM and ECM to make them play nicely with one another.
But the best analogy I have to explain this, is imagine having two identical Laptops. One has windows XP, and the other running windows 10.
They both technically use windows and can run programs, but doesnt mean they have the same capabilities or run the same software.
ECUs a similar. The ECU operating system needs to be compatible with the TCM operating system otherwise it will not understand whats going on. I see that regularly here where there is a mismatch between OS's and there will be an actual fault code indicating missing TCM data from the ECM.
As far as Im aware, there was no factory setup between a E67 and T87. Both will be from Global A vehicles, but I believe the E67 still requires a custom touch.
Do you have it fitted already or trying to work out if it works first?
I already know that both the E67 and the E92 can speak to the 6 speed transmission. I have an early 2015 Tahoe with the 6 speed and an L83. Later model 2015s and 2016s came with the 8 speed. Since the TCMs run the transmissions and just use CAN data from the ECM to decide when to shift, I can't see it being too difficult to make them speak to each other unless there was a language change. GM putting both behind the 2015 Gen5 tends to rule that out though as I can't see GM changing languages for just 1/2 a year's run they used to use up their last 6 speeds.
If anyone were able to read the inputs for the T43 and the T87/T87A and see if they are looking for the same stuff, then perhaps it's just as easy as repinning a connector. Unfortunately I don't have the skills to determine this, nor have I ever been able to make sense of it. Reading the originating post, I could kind of follow along with the goals, but the computer stuff, right over my head.
If anyone could come up with a standalone controller for these guys, there would be a lot of money in it. I'd certainly be a customer, and I'd be buying several as my hobby is old car restoration. However, I just can't see using 4 speeds anymore and the 6 speed is quickly going to go away since they came out with the 8 and now 10 speed just a few years apart. Even the 8 speed is going to be a unicorn in a few more years. A standalone controller would need to be something that could read whatever sensors are needed as standard sensors, then convert it into something the transmission could read. If I understood computer programming, believe me, I'd already either be working hard at it, or would have something on the market.