FYI>>I found out something interesting.If you have over drive problems
and just got through with some alarm problems (aftermarket alarm ) you
might want to check your starter relay.It seems that dodge ram with
after market alarms (if you experience problems with your overdrive not
working wright after alarm problems) when the key is on there is a 3-5
volt draw on the sense wire going to the neutral switch(after market
alarms insert a relay in the yellow wire coming from the steering
column).The PCM sees the voltage draw and thinks the trans has no need
for fourth gear overdrive.
go to hppt://dodgeram.org/tech/repair/electric/alarm.My dodge has 4th
od now.Along with putting the oversize tires back the the stock tires.