Recently purchased a used 2003 Exp Eddie Bauer, 4x4, 5.4L with 181k miles.
Recent maintenance:
- plugs and coils
- all EGR related components
- cleaned MAF
- fuel filter
- changed all fluids to spec
Problem:
This began after I changed (drain & fill) the tranny fluid so I am hoping it isn't the dreaded situation of changing the tranny fluid on an old tranny leading to tranny failure (yes, this does happen sometimes). I used Mercon V.
So, when the car is at full operating temperature, it shudders/hesitates in all gears *only* in the 1500 - 2000 rpm range. Beyond that no problem, except that it does shudder a bit when manually activating and deactivating the overdrive switch at highway speeds. Right as this problem occurred, my mpg went from 12-13 in the city to 9-10.
Prior to the fluid change, tranny shifted perfectly.
Anyway, the car starts easily, idles perfectly, and throws no codes when idling and when driven at highway speeds.
I know that asking about this is a shot in the dark as there are a number of things that could cause these symptoms. But I thought I'd see what y'all have to say! Thanks!
Recent maintenance:
- plugs and coils
- all EGR related components
- cleaned MAF
- fuel filter
- changed all fluids to spec
Problem:
This began after I changed (drain & fill) the tranny fluid so I am hoping it isn't the dreaded situation of changing the tranny fluid on an old tranny leading to tranny failure (yes, this does happen sometimes). I used Mercon V.
So, when the car is at full operating temperature, it shudders/hesitates in all gears *only* in the 1500 - 2000 rpm range. Beyond that no problem, except that it does shudder a bit when manually activating and deactivating the overdrive switch at highway speeds. Right as this problem occurred, my mpg went from 12-13 in the city to 9-10.
Prior to the fluid change, tranny shifted perfectly.
Anyway, the car starts easily, idles perfectly, and throws no codes when idling and when driven at highway speeds.
I know that asking about this is a shot in the dark as there are a number of things that could cause these symptoms. But I thought I'd see what y'all have to say! Thanks!