All I can say is every Diesel shop should be as professional, honest and reasonable as Garrison at Tach'd out Diesel. He was recommended to me when my 6.7l power stroke started clapping. Ford wanted 3500 to pull the heads and check things out. Garrison did it for a lot less and recommended replacement . I ordered the engine and the guy that recommended Garrison for diagnosis said he would do swap but cancelled on me. I spoke with garrison and asked questions and knew his stuff. I had the engine shipped to him (He also can get engines for far less than I paid.) Install and tune up went great. He also identified an issue with my transmission. Recommended a transmission shop took care of all of it as ( I live 4 hours away in another state) 5 stars all around. Any diesel work I need done I'll certainly consider getting the truck to Garrison. read more