Hey all I have an 04 excursion with around 150k miles on it, well a while back started having charging system issues and then the alternator went out completely. Had the alternator rebuilt with all new parts and installed it.. charging system was back to normal but during all these charging issues transmission started doing that flaring and tow/haul flashing.... then after alternator was installed it continues and is showing solenoid D for a code..... replaced shift solenoid D and no change from what I'm told by my mechanic.... really need some help as my guy has been trying everything he can think of.... is the transmission toast maybe? I appreciate any and all feed back! Thank you.