tranny downshifts for no reason
#1
tranny downshifts for no reason
I work w/ a person that has a tranny question:
vehicle: 2000 Expedition 5.4L, 124,000 mi
Turned the air on full blast yesterday...ran a little rough...shut AC off. Was normal driving and the truck started downshifting periodically while driving for no reason. ATF is full and changed recently. Dont know if this is related but lights on dash lights and overhead compass/therm. seemed dimmer and the compass/therm. would flash on and off.
Thanks in advance
vehicle: 2000 Expedition 5.4L, 124,000 mi
Turned the air on full blast yesterday...ran a little rough...shut AC off. Was normal driving and the truck started downshifting periodically while driving for no reason. ATF is full and changed recently. Dont know if this is related but lights on dash lights and overhead compass/therm. seemed dimmer and the compass/therm. would flash on and off.
Thanks in advance
#2
I just drove the truck, and it first it seemed like the torque converter was locking/unlocking while driving at a steady speed of ~50 mph. The tachometer would drop to 0, spike high, then settle again. This was not representative of the actual RPMs. Driving a little more, it seemed like it the engine would bog down when the funny shifts would occur and the tachometer go crazy.
Any Ideas?
Any Ideas?
#5
Originally Posted by casey_1
Fix the engine problem and the trans problem will go away. The trans is just a symptom of something else going wrong.
Oh yeah, the check engine light is NOT on.
#7
Apparently the alternator crapped out last night on the way home. The gauges pegged, the windshield wipers came on, and the truck died. After getting jumped, it reportedly ran a few seconds after the cables were removed and died again.
I'm guessing between the alternator getting replaced, the ground getting cleaned, and replacing the battery (still the original), the problem will be solved.
Thanks.
I'm guessing between the alternator getting replaced, the ground getting cleaned, and replacing the battery (still the original), the problem will be solved.
Thanks.
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#8