700R4 Shifting too Soon when Pulling a Load

[VileZambonie]

The main cooler is designed to regulate the trans fluid temp, essentially around engine operating temps. If towing etc, the auxiliary cooler helps get rid of the excess heat. Simply unplugging the TCC solenoid will not overheat the trans contrary to what many people think/say. Yes it will run at a higher temp but essentially it's a heat energy loss, fuel mileage decrease. You'll be fine with it unplugged while you figure it out.

[85K10SB]

The main cooler is designed to regulate the trans fluid temp, essentially around engine operating temps. If towing etc, the auxiliary cooler helps get rid of the excess heat. Simply unplugging the TCC solenoid will not overheat the trans contrary to what many people think/say. Yes it will run at a higher temp but essentially it's a heat energy loss, fuel mileage decrease. You'll be fine with it unplugged while you figure it out.

Thanks for the info.  I took the truck for another drive with the TCC hooked up and for the first 5 miles or so it worked perfectly!  It was locking in OD only.  Stopped to get gas and it started locking in second again.  I'm going to try to trouble shoot the wiring when I get home from work today.  If it's not the wiring I think I'll try replecing the solenoid if it's within my abilities.