Re: How does one pick an RV? 2006 or older diesels have most of the bugs worked out. The 2007 and newer models have new engines and could have some bugs. The 2003 and newer Dodges CTD have good auto transmissions. Older (02 and older) Dodge CTD have weak Auto transmissions. The manual is good in all older Dodges. GM diesels favor the Allison auto transmission. Haven't seen any manuals in GM model diesels. The Ford 6.0L Power Stroke diesel has had lots of problems.