I have a 1993 Delta 88 LSS with the 4T60E transmission. It has developed an unusual problem that I hope someone can explain.
During the first 10 miles or so of driving, when I have to come to a stop, the transmission will not downshift to the lowest gear. When I come to a full stop, it acts as if it is in neutral - stepping on the gas just revs the engine. If I wait a while, say 15-60 seconds, it will usually drop back into gear and run normally.
I have discovered that, when this happens, if I move the gear selector to "1" (low gear), it will usually engage right away.
After I've driven 10 or so miles, the problem pretty much goes away. The car has 135,000 miles and the tranny has had a fluid and filter change every three years.
Any ideas anyone? Thanks.