World’s First Full-Manual Valvebody, Four-Speed 68RFE Full-Manual Valvebody, Four-Speed 68RFE WP Developments has created the world’s first full-manual valvebody 68RFE. The quick-shifting four-speed does away with the use of the 68RFE’s […] Mike McGlothlin February 06, 2023 Diesel News Diesel Tech / How-To Dodge ram