My '03 Venture has a harsh vibration when stopped in drive. It immediately goes away when the brake is released and the van starts to roll. It doesn't matter if the A/C is on or not.

Any ideas? Has anyone had this and figured out what it was?

Any help appreciated.

 

How many miles on it?

check your motor mounts.
Run a diagnostic scan for any faults.

 

About 140k. No check engine light.

 

no check engine light doesn't mean no stored faults

 

Well, I know what it is. I changed the oil today and there was oil all over the bottom of the pan, but no drips or puddles. I checked the motor mount and, sure enough, it's caked with oily crud. Parts on order from Rock Auto.

Dead hydraulic motor mount.

 

I think I found the problem.

 

I had the same problem on my old Venture, it was letting the engine shift all over the place under the hood.