Hello,
My Ex has the same late shift problem, also a higher idle speed around 1,000 rpms instead of a steady 600 rpm's. Under light throttle shifts occur from 3,000 - 3,500 rpms. Normal operation was 2,000 - 2,500 rpms. 98 Ex sport 4.0 SOHC, 5R55E trans with 55,000 miles on it.
It first...