Auto trans wont shift after ls1 install

[CamaroJesse]

My dad just finished an LQ9/4l80 swap in his 68 camaro. The car runs and drives but the trans will not shift out of first gear. codes that are coming up are

p0713c-trans fluid temp
p0758c-2 to 3 shift solenoid circuit
p1638c-generator f terminal circuit
p18110c-trans fluid pressure position

any ideas on what could be causing these codes and lack of shifting?

thanks
jesse

[csouth]

Well I can tell you that the shift solenoid code will cause problems with shifting. Had the code on the 4L65E in my old Yukon and it would not change gears. I believe it helps read the engine RPM and tells the trans when to change gears.

[mean buzzen half dozen]

Off topic, but what trans cross member did you guys use for the 4L80E?

My friend that rebuilds transmissions told me it's always a good idea to change out the shifting solenoid pack & install a new one.
Does not cost much.

[cpd004]

What ECM/TCM are you running?

[CamaroJesse]

ecm is from texas speed.

[cpd004]

Did you mention this issue to Texas Speed? Could be a programming issue.