bigirondog

so what truck you workin on..........jI have installed a cruise on 03-06 by just buying a turn signal switch with a cruise for the same year model. plug and play.........99-02 buy a turn signal switch with cruise controls and you still need a servo motor...the Throttle body is cable controlled..you can get them at a junk yard.....

I don't believe its the temp being to high.......I did block the cooler to raise the temp but no change.......being unblocked and cool to the touch plus in 30deg weather it still does it......... the trans is running cool....

blocked the cooler to increase the temp........no change still TC still unlocks at 70. MAF, crank sensor........no change...........

I will try a piece of cardboard and block the cooler before I change it back. just to see if I can get the temp to stay up. thanks.

I have owned it since 45,000 miles......I never drove it on the interstate or got above 70 until a year ago. the temp guage never gets hot, trans seems to run cool. I replaced the stock cooler with a larger trans cooler. it does this when its cold also. first thing of a morning takes a long time for TC to lockup.

I have a 06 GMC 2500HD 4x4 6.0 4L80E 4:10.. 85,500 milage..... my issue is the torque converter will unlock at random at about 70 mph. I can pull a trailer with a heavy load and stay under 70 mph and all is great. power is good. however with NO load and level ground the torque converter unlocks and will not lock back up until I slow down to below 65 mph. NO CODES..... I have extra parts from other trucks to which I have changed the throttle position sensor, throttle body, ECU on the firewall under the hood, and the torque converter lock up in the trans. also changed the fluid, added lucas all with no change. it takes it a long time to lock up when its cold, first thing of a morning. this truck does great under a load or empty as long as I stay below 70 mph. using the cruise or with out, no change. any suggestions as to where to look and what at would be great.