Hey Everyone,
I originally posted this in the engine section and just realized that it probably should have been in the transmission section.
I have a P59 from a 2004 Silverado that I swapped into a 1965 Buick Special. Engine, trans, ECU, and harness all came from the donor vehicle.
I am having an issue where the computer is locking up the converter very quickly in 1st gear and does not unlock the converter until you are under 4-5 mph.
Technically there is no option for 1st gear lockup in the table and 2nd gear is set to 256mph so it should never lockup unless it hits 3rd gear.
I have verified that the 12v brake signal goes to Blue pin 33 and there is 12v while driving around and when the brake is applied it goes to 0v.
Speedo in VCM scanner reads correctly.
Any idea what would be causing these issues with the lockup? You can see in the attached data log that the TCC Applied goes to yes while in 1st gear.
Let me know if you have any questions.
Thanks!