New truck problems

Well northern ohio gets pretty cold and even synthetic oils are pretty thick at -30. Its not all thermal expaintion. But effectiveness to lubricate.

 

Youngster^^^^^!

 

If your grandfather used 10W-30 in a rear gear in winter, he had to drive 20 MPH for a few miles to mobilize the paraffin wax. Today's Naphthenic lubricants flow at -30 better than dinosaur oils flowed at 32 above. The worst thing for synthetic oil flow is a filter. Rear gears and transmissions don't have that problem. If what you have been doing works for you... Keep doing it. Its rare to find a rear gear set that doesn't go a million miles no matter what you're doing to it but in my experience, heavy haul in Arizona proves heat is a worse enemy than cold.

 

Or an old guy with more air leaks in his 40 year old Freightshaker than his air compressor can overcome.

 

Just wondering if the op had the ecm hooked up to the diag computer to see what's going on?

 

My great grandfather gave whiskey to the mule to warm it up on cold days skidding logs, before trucks. Im contend with warming thing up before I put them to work.

 

Old Iron usually did not get moving until 180 temp, that was one of my teachings to make sure that when you do get out there, it has been warmed enough to give power and after about 10 miles the transmission and rears are coming up to temp too and ready to do battle.