2005 Dodge Ram 2500 Automatic Diesel.
Sometimes first gear, not available. 3rd and 4th gear are slipping when towing.
Received a code, P1756, Govenor low pressure.

recently had transmission serviced, and they adjusted the bands.

 

Welcome to the site. I will move this thread to the third generation Ram section,
FF

 

check the transmission fluid level

 

And being you have a CTD, we will help you get over to that section so maybe someone can help.

How long ago was if serviced and why was it serviced? For regular maint or other issues?

 

My fault, I did not notice he had a Cummins. I moved it to the wrong section,
FF

 

Fluid levels are good.
A friend advise me to get the bands adjusted.
I tow a 13000lb toy hauler.
Hypertech programmer forced air flow & magnaflow exhaust

 

if the fluid level is good... what is the condition of the fluid?
have you ever serviced it?

 

tranmission serviced in June, about 2000 miles driven since dealer service. Fluid clean.

 

my guess is an open wire in the gov pressure sensor circuit.
if you have a multimeter you can check it yourself.

 

How do I check the wire's?
I hope its this simple, right now I hope the transmission is not bad?