I have a 1999 zr2..just got done with a motor change. stock 4.3...and check engine light came on after i already cleared the codes...They were Torque Converter Circuit Malfunction, Shift/Timing Solenoid Malfunction, TCC PWM Solenoid CKT Electrical, TFP Valve Position switch circuit malfunction...any idea how to correct these? They all came on within 5min after starting the truck up after clearing the codes

 

Lets start with the specific codes (Pxxxx).

 

my scan tool doesnt say all the trouble codes...the only one i got was P0740

 

How did you determine that all of those things were faulty?

P0740 - book explanation...

 

those are exact quotes from wat my scan tool said

 

That is quite odd that your scan tool can give you the description of the code, but not the actual P-code itself. This also makes it very difficult to work through the trouble shooting steps as there are a number of P-codes for each of those descriptions, each with a different diagnostic chart...

One thing that you may want to try first is disconnecting the main transmission wiring harness into the transmission and cleaning it with some electrical cleaner. It is possible that the connection has become corroded and/or otherwise problematic, requiring some maintenance.

 

Are there any fuses or relays 4 th tranny or torque converter??

 

wat would cause p0740. P1860. P1810. P075.....its obviously something with the transmission or transfer case. any help?

 

P0740 - Torque Converter Clutch Circuit
P1860 - Torque Converter Clutch PWM Solenoid Circuit
P1810 - TFP Valve Position SW. Circuit Malfunction
P0750 - Shift Solenoid A

To me it sounds like you have a poor ground or connection somewhere. Have you tried searching the DIY section for any of these codes? Post up if you can't find some of them and I will see about getting the diagnostic process into the DIY section when I get back from my business trip.