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  Any progress being made on using 6 speed Auto Trans w/ motor swaps?

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Any progress being made on using 6 speed Auto Trans w/ motor swaps? by qwikgta
Started on: 02-06-2020 06:37 PM
Replies: 1 (144 views)
Last post by: Dennis LaGrua on 02-12-2020 10:15 PM
qwikgta
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Report this Post02-06-2020 06:37 PM Click Here to See the Profile for qwikgtaClick Here to Email qwikgtaSend a Private Message to qwikgtaEdit/Delete MessageReply w/QuoteDirect Link to This Post
As the subject states, has there been any progress being made or any updates on using a newer GM 6 speed Auto Trans on a 3800 or LS4 or Ecotec motor? I know some of the newer Ecotec motors and 3.5/3.9/3.6 may have had them but not sure if the ECM/TCM issues have been worked out on those newer motors (for swaps).

I recall an older thread w/ a LS2 and 6 speed, but that guy worked for a company that did custom stuff so its not like we have access to that tech.

And yes I did use search, found several older threads about this and that, but nothing new.

Also, for those of you who have the knowledge, feel free to chime in about the issues that prevent us from using the newer 6 spd auto trans.

Reason I ask is that I own a 2017 Pacifica w/ 240hp motor and 8 speed auto trans and i'd love to have that in a daily driver. 1000 lbs less weight that thing would fly.

Thanks in advance

Rob
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Dennis LaGrua
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quote
Originally posted by qwikgta:

As the subject states, has there been any progress being made or any updates on using a newer GM 6 speed Auto Trans on a 3800 or LS4 or Ecotec motor? I know some of the newer Ecotec motors and 3.5/3.9/3.6 may have had them but not sure if the ECM/TCM issues have been worked out on those newer motors (for swaps).

I recall an older thread w/ a LS2 and 6 speed, but that guy worked for a company that did custom stuff so its not like we have access to that tech.

And yes I did use search, found several older threads about this and that, but nothing new.

Also, for those of you who have the knowledge, feel free to chime in about the issues that prevent us from using the newer 6 spd auto trans.

Reason I ask is that I own a 2017 Pacifica w/ 240hp motor and 8 speed auto trans and i'd love to have that in a daily driver. 1000 lbs less weight that thing would fly.

Thanks in advance

Rob

To use the 6T70 are you must have a PCM that can shift it. Only specific PCM's can be programmed to shift the 6 speed and these PCM's are not used on any of the Fiero swaps. You could try to locate an external transmission controller but I'm not sure if anyone makes one..
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