[Opera House]

Try it in D when you start out. That would verify it is not an OD One Way Clutch problem. I assume the filter was changed after this problem showed up. Sometimes there is a problem on the filter O ring and the tranny sucks air till the fluid warm up. Frankly, think it is just getting old. The seals are leaking to the forward clutch. Do you also have a delay going into reverse? The loe/reverse servo O ring is known to be a problem. This is used in reverse and first. There is a new updated double lip seal and this is easy to get at when the pan is dropped. Just four more bolts. If you stop that leak, the little check ball in the forward clutch might seal a little faster.