If you mean the capped T that installs inline to your heater core line, then YES, I have one installed on the Ranger. I've installed one on every vehicle I've owned. You may only need to use it once or twice, but it sure is handy. Just unhook the lower radiator hose, hook up the garden hose to the newly installed T, and flush. You can have the vehicle running with the heater on to help flush EVERYTHING. You'll be amazed at all the crud that comes out of a properly flushed system. Even the best maintained systems get build up over time.
I recommend it!!
2001 Ranger Edge - Bright Island Blue3.0L/5-Speed Manual/Supercab/Stepside/Sliding Rear Window/Step Bars/31x10.5 BFG All Terrain T/A's on Factory Chrome Rims/Class III Hitch/Black headlights & Corners/Black Tail Lights/Titanium Chrome Corner & Signal Bulbs/Sylvania Silverstar ULTRA Headlights & Fogs/Ventshade Window Vents/Tonneau Cover/14% Tint/Pioneer Deck w/ 2x12" Pioneer Subs & Clarion Amp/MAC Intake/Leather Seat Covers/Bilstein Shocks/Westin Safari Bar with 6" 130W Blue Tint Fogs/2006 Fender Badging/LED 3rd Brake Light
Too much to list, check out my Cardomain
PROUD TO BE CANADIAN