[scantling1]

hello this is a post form a newby. I am happy to have found this site I own a 2000 astro awd. resently I gave it a tuneup but that did not solve my surging problem. at about 45 The van starts to surge mostly on the flat but it has happened on hills. I was thinking it mite be the transmition trying to shift this is only my guess. help with this problem would be very apperciated

 

[johnny-77]

Does this happen at steady trottle? Decribe every thang you can about when it happens.