Hi I have 2004 Dodge Ram 3500 with a Cummins diesel and have worn out 4 serpentine belts in 50,000 km. I've checked the pulley alignment and they seem to be straight. Any thoughts would be greatly appreciated.
Thanks.

 

it could be possible that your tensioner is too tight or loose making the belt wear premature

 

Welcome to the site. The pulley alignment was my first though but as said above, a belt too tight could also do it.

Do all your accessories spin and rotate fine without issue or noise?

 

I had a 98 Grand cherokee 5.2L with the same problems. I know its totally different but hang on. There was an aluminum bracket that the power steering pump mounted to that mounted to the engine. The bracket cracked which I did not realize at the time, and I went through 3 belts. The crack was so small and threw off the pulley so little you couldn't tell with the naked eye until you physically viewed the aluminum bracket. Maybe double check the pulley alignment? Cheers

 

Thanks for the quick replies I will check things out