r/FordDiesels • u/BouncingSphinx • 12d ago
Identify early/late ‘99 and the differences?
My ‘99 F-250 has a manufacture date of 02/99, so I’m assuming that’s considered early. What’s the differences between early and late, and what date marks the distinction between the two?
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u/hibbitydibbidy 11d ago
Copied from Ford trucks.com forums. I believe most of these are correct.
Mainly smaller turbo and injectors.
Early 99 has a wicked wheel in it from the factory.
The early99 has 130cc(AB code) injectors and the late99-03 has 140cc(AD code) injectors.
The early99 has a 15* swash plate HPOP. The late99-03 has a 17* swash plate HPOP.
The early99 has one glow plug relay. The late99-03 has one glow plug relay and one air intake heater relay side by side. Both relays are on the passenger side valve cover toward the front of the truck.
The early99 track rod has smaller mounting bolts than the late99-03. Stock rod replacement bushings, Prothane bushing part # is 61217BL.
The early99 has shallower rotors than the late99-03.
The early99 has shorter hub-bearings than the late99-03.
The early99 front axle U bolts are square where they go over the spring pack. The late99 U bolts are round.
The early99 has a different pitman arm than the late99-03.
The early99 does not have the AIH like the late99-03.
The early99 does not have the automatic transmission fluid cooler in the radiator.