No expert, but suspicion that should goto (Ford/Chevy/MB?) dealer/ Truck shop as a chassis Item? Another suspicion is that (proper person) can ADJUST w/ a LAPTOP COMPUTER? IF clock internal to the RADIO, I am all wrong 
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THenne1713
2000 Conquest LE 6266, Class-C on 99-E450SD, 6.8, 2v, V-10
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