C6 TRANSMISSION MODULATOR: PUSH-IN BLACK STRIPE
I replaced the old modulator with this new one. So far my C6 transmission shifts perfectly. The shifts are very nearly at 2000 RPM (right out of the box, no adjustments) under slow acceleration. My Ford E-150 is just a grocery getter, not a race car.
Thank you for getting me the right part very quickly and at a very reasonable price.