2008 Volvo VNL780 Jerking under heavy load no codes

It cranks, but takes several tries to get it to crank. Not sure if this is two different issues or one in the same. Just started the cranking issue about a week ago but the jerking has been going on for months. Miss our freightliner. Lol

 

Ok so he turns the key and the motor cranks or does it do nothing? If it cranks but doesn't fire after 3 or 4 seconds then yes definitely cups.

 

Doesn't do anything.

 

Start at the batteries, check cables & connectors.

 

Check the small wire on the starter? My Volvo melted that one and it only made contact now and then. Finally it broke completely in to and wouldnt crank.

 

Have him check the battery cut off switch. If the truck came with one. They are exposed to the elements and tend build up resistance and cause wierd problems. But it sounds like 2 different problems.

 

Thanks guys for all your suggestions. He just made to the truck stop in Vegas and is going to check/clean all the connections.

 

Did you find what was problem

 

I bet it's clutch, I had the same thing few months ago

 

Did you find the problem? I just have the same issue. Thank you