I just bought a 94 plymouth voyager with a 3.0L engine from a mechanic who put in a used tranny.
Ran fine for 2 days then the check engine light came on.
I tried the on/off trick and got the light to flash the codes;
I got:12, 37, 32.
The 37 I need help with. How do I go about trouble shooting this problem??
Any help will be appreciated

Not a tranny guy but here's a couple of links that talk to it:

http://www.iequus.com/support/obd2_definitions.php MIL code 37 equates to scanner code P0743. Type it in the block.
http://autorepair.about.com/library/a/1i/bl499i.htm
http://autorepair.about.com/library/faqs/bl205e.htm
http://autorepair.about.com/library/illustrations/bl151a-lib.htm

Thanks for your help.
I wonder if there is any way to disable the TCC??

If anyone has a service manual, can you please help me troubleshoot the 37 problem??

When I checked the TCC solenoid electrical connection on the tranny, it was loose. Made a secure connection, cleared the code, and so far (3 days) the code has not reappeared - so I think the electrical connection was the problem.

http://autorepair.about.com/library/illustrations/bl151a-lib.htm

Glad to hear you found an easy fix. Congrats!