4L80E Overdrive Shifting
#1
4L80E Overdrive Shifting
The 4L80E in my 97 2500 Silverado occasionally will not readily shift into overdrive and will sit in third on straight level highway unless I either give the throttle a quick prod or the truck goes down a slight downhill slope that it will shift into OD. Otherwise the tranny shifts smooth and quiet. Any idea what the problem could be? I just had the tranny flushed and filter changed, but it was doing it before that too.
Thanks in advance.
Thanks in advance.
#3
#5
Nope. Truck is bone stock other than a K&N. If it was an older model I'd say it would have something to do with vacuum pressure. It seems to shift into OD ok when little or no torque is being applied.
#7
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snake91876
Tahoe & Suburban
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October 13th, 2012 4:41 PM