AUTOMATIC TRANSMISSION PROBLEMS

So the battery was disconnected for 30 min, and no change. Still gives flashing F and 71.

 

So disconnected batteries for 30 min and no change. Flashing F and 71 still coming on.

 

I see a tow to the shop in your future.

 

Yeah, gonna try and limp up to the dealer.

 

This is heavy Chevy Trucking out of Detroit Michigan I have a 2016 579 Pete transmission starting to slipped luckily it held up and I finished my Amazon load what could be the problem

 

Bring to my shop on Monday if you like. I won't charge you for taking a look at it. PM me.

 

absolutely horrible gearbox and you will need at least a nexiq2 to dianose it,you may actually have to read idividual CAN BUS messages and decode them for failure mode identifier information (FMI'S).
OEM wiring and switches/sensors causes most issues and alot of them were'nt right from the factory.
besides the elec issues air components also cause issues particularly if it's holding in 10th gear.
if it loses communications over CAN BUS it will log rail shift codes cos it torque locks and it cant shift gears.

 

I have a international prostar 2016 cummins isx 450 and just started a slight vibration and small jump while excelerating in gears 4 and 5

 

@Heavyd, I read your many replies. You're really good. I have 2015 prostar automatic. It won't go past 5th gear. I'm getting code 71. Any suggestions for me?

 

I replied to your other post.