I would say from the info that your overdrive clutches are going out and a
bad rebuild is in your future.
but i have been wrong before on such short information.
is it a 4le60?
You wrote on Sat, 15 Sep 2007 18:42:17 -0400:
g> 1997 1500 4x4. started truck and service engine light came on. put
g> truck in 3rd and hesited to drive forward, put in reverse and drove
g> fine. put in 2nd gear and it drove normal. tachometer and mph gauge
g> not working. the truck runs normal only in 2nd gear. I put it on a
g> computer and these codes came out PO740,PO753,PO758,PO785, and P1860. I
g> don't know if its a computer problem or tranny is going out. ARE THESE
g> codes a part or what? Is it something I can fix or take to a shop?
With best regards, email@example.com. E-mail: firstname.lastname@example.org