shifts weird? Wont stay idle in park,

[dtl 2k2 sport]

We'll it just started tonight. The shifting was fine, then tonight as i was getting in my truck to get out of the garage, it wanted to stall out. I hit the gas and it was fine. Then 5mins or so driving down the road, The shifting from 35=45 mph felt alittle weird. Maybe I'm getting alittle parioniod. So lately the idol has been rougher then it should, but as i was sitting in park, The check engine light came on, yellow light), and it stalled out. So i'm in park, and it'll slow down, from 15oorpm, to 1k, then stay for 10 secs or so, then work to 0rpms and stall OUT. It's done this 5 times w/ out failure to actually work correctly. Is this causing my shifting to feel alittle off,? Fluid seems to be fine, and all. Driving the truck other wise is fine, i punched the gas a few times and took right off. But the stalling issue is the main problem. Idle sensor? or more, thanks, dave

 

[dtl 2k2 sport]

SORry also this is on a 2000xlt 4.0 v6,, auto ,,

 

[NHale623]

Did you try to pull the codes?

 

[dtl 2k2 sport]

took it to auto zone to check, the codes came up as ,,
lean fuel,, possible iac issues, and it wont stall in nuteral, as someone asked me ealier,
and the Pending drive train,,,,,,,, came up,,,,, the shifting is feeling alittle off, and i noticed a slight whisteling noise this morning if i was driving 35mph or so,,