What would cause the granny to not go in gear when temperatures are cold.

 

Insufficient warm up. Next time after finishing a trip, park on a level surface and check your dipstick make sure the level is good.

 

It did finally start shifting through gears after it warmed up. I drove it about 10 to 15 minutes to town. I did check the fluid while it was in park on a level spot. It was full and clean not dark.

 

If it was full and very close to the warm mark then the fluid level is fine. In the winter and after it's warmed up but before you drive set the parking brake and step on your pedal firmly, then shift to every gear and hold for around 10 seconds, keep this practice during winter time.

 

When you say step step on the pedal, are you referring to the gas pedal. To get the gears warmed up.

 

Brake pedal.

 

That's what I thought you meant. I just wanted to make sure. Some people can be rude in ways

 

BTW if yours is powerstroke diesel with turbo 6.7L or any cars with turbo, especially like those ecoboost with small engines 1.5L to 2.3L (smaller engines with turbo will put heavier load to the turbo), always warm up to prolong the life of the turbo, and don't rev over 2500RPM for the first 5 minutes. It's fun to drive a turbo car but it's not easy to maintain it. Doesn't matter it's in winter or summer time, doesn't matter if the temp gauge on dash shows it's close to operating temperature, just don't drive aggressively (rev hard) for the first few minutes.

 

6.2 liter gas. 4×4. We got it to pull our 28 travel trailer. 6 speed automatic transmission.

 

Will need to check, but some ford trans had a temp sensor type flat spring that opened when temp rose to certain temp. Until this temp was reached shift scheduling was affected.

Will get back when I have an answer.