E38 T42 tapshift 4 speed

[80gus]

Hi all, i'm currently doing a conversion using an E38 -t42 set up for 4l80e, going through the file on HPT i see a section that allows you to turn on Tapshift. What i'm wanting to know is it achievable for a 4 speed transmission to have a functioning tapshft without a BCM.
I know the 6l80e can be done without a BCM there is a company that has made a module that communicates via Can, or you can use a 2010-12corvette o/s with some resistors and make it work. But from all research i have done i cant find anyone that has a 4l60-4l80e working with tapshift, and a factory TCU. any helps or leads would be appreciated.

[Tazzi]

Requires a separate module bud. Special command gets sent out which tells the car to change gears. Thats what the "module" does.

[80gus]

Is that module available mate I found a company that do it for the 6l80e but it's fairly expensive,

[Tazzi]

Is that module available mate I found a company that do it for the 6l80e but it's fairly expensive,

The reason that company probably charges alot is because it does require custom hardware, knowledge and understand to have reverse engineer the transmission requests and calls in the car.

I don't have a public module available to do that though. I did make a proof of concept video... if I can ever find it.. showing tap shift being performed via canbus.

[80gus]

It's not the case it's expensive it's a case that it's not know to work on a t42. I would happily buy it if I knew it would work. Be great to watch the video Tazzi thanks for your reply

[Tazzi]

Ah right, I just realised your talking about T42.
Iv only done my tested on T43.

Didnt the SV6 VZ's have tap shift?

Id assume they would also be CAN based to alert the gear change. But.. it might not be the same sequence as T43. Would have to jump in a VZ for some hours to know for certain.

[80gus]

The 5 speed auto did but I don't believe that used the t42.

[Tazzi]

The 5 speed auto did but I don't believe that used the t42.

Ahhhhhh.. Yes, I do recall it being a 5speed.
Maybe one of the other lads can chime in here for what is used?

Ill check the factory manual and see what it says.

[80gus]

The 5 speed auto did but I don't believe that used the t42.

Ahhhhhh.. Yes, I do recall it being a 5speed.
Maybe one of the other lads can chime in here for what is used?

Ill check the factory manual and see what it says.

Seimens TCU looking at Ebay, it shows that the clip into the same location but are completely different to look at.

[Tazzi]

The 5 speed auto did but I don't believe that used the t42.

Ahhhhhh.. Yes, I do recall it being a 5speed.
Maybe one of the other lads can chime in here for what is used?

Ill check the factory manual and see what it says.

Seimens TCU looking at Ebay, it shows that the clip into the same location but are completely different to look at.

I imagine it will accept the TUTD commands. Its more a matter of spending the time to give it a go