My 1984 SD was shifting hard, too early & under about 30mph often wouldn't downshift. At stops I had to bury my foot to the floor & creep forward until the car got some momentum. I had good power if I manually shifted but it still banged in gear. I went through your checklist in "Diesel Performance Tuning & repair" manual...
All I did was clean out the 'banjo" fitting, replaced the rubber intake elbow seals in my turbo, ran i... Read More