Originally Posted by zx6rrdan
What I think you are seeing is a delay in the transmission locking up the torque convertor. The truck will quickly shift into OD(5th) even when cold but doesn't lock up the torque convertor until the tranmission fluid temp is high 90's/100F. Lucky it heat up fairly quickly even when cold.
Just a quick note that I've had my convertor lock up with the with trans temp lower and seems more dependant on engine temp than I first thought. Prob a combination
2010 B4000 4x4 SE+
mods:Tinted windows,Line-X,BAK Rail Caps,rust proofing, stebel natilus air horn,ScanGauge II,hitch reciever cover, Belkin Iphone mount charger, rubbermaid floor mats, hose clamp tailgate, mud flap delete, Cargo light 3rd brake light, explorer lighted visors, mustang dome light, fog light mod, Mountaineer ohc, bosch evolution wipers, GenK51a mirror,Kenwood p680c speakers, Underhood LED's, Ranger winter rims 245/75-16 Blizzak DMV-1's, 180lbs winter bed weight