Dorman 090-204 Oil Drain Plug - Piggyback M14-1.50 Compatible with Select Ford / Lincoln / Mercury Models, 5 Pack

This part do works with 2005 to 2010 Mustang 5R55S automatic transmissions replacing OEM part 6R3Z-7A010-A. However, apparently Dorman only acquired partial rights to duplicate this part and designed the inner filling aperture smaller than the original part making it incompatible with Ford No. 307-437 Fluid Fill Adapter (OTC 6604). Nevertheless, take into consideration that just one of OEM part 6R3Z-7A010-A can cost you $30 and Dorman gives you 5pc here and you will need them considering that the inner Torx cap can get stuck and irretrievable (probably that's why you are seeking a replacement). All that being explained, you need a fill adapter size 5/16 with a 24 tread. So far I have found only one and is the Mityvac MVA589 ATF Refill Adapter designed for Volvos which is actually less expensive than the Ford OEM part. Amazon and your local O'Reilly sells them. Compatible with Ford 5R55S & 5R55W found on Mustangs and Explorers.

Very good product

Received a box of 5. If you are buying these do not get the premade fill adapter that fits stock drain plug. The fill hole on these are different threads. Just take one the hardware store and get compression fitting hose barb that matches.

great

When you need to add transmission fluid you pull out the center set screw and attach a brass nipple to attach a hose to. This set screw isn't a normal size, like 1/8" pipe. I couldn't find anything to fit it.

It's great that you get 5 for the cost of one from Ford. However the quality varies from plug to plug. I had to use 2 inner set screws to keep it from leaking. Looking at all 5 each set screw goes into the main plug at various depths. The original seems to set flush with the inner lip and has never leaked, however it also rusted and seized. Terrible design from Ford. Was it that difficult to put a dipstick on the pan?Standard fill adapter will not work. I got lucky and had purchased a marine fluid pump that came with 2 adapters. One of which was metric. It wasn't an exact fit but it was close enough to get a few threads on and fill the trans. I believe it was an 8mm adapter.

Goog

The OEM drain plug WILL NOT FIT this drain plug because the hole is the center (5/16) is smaller. I found that the Mityvac - ATF Refill Adapter - Volvo MVA589 works with Ford 090-204 Piggyback Drain Plg made by Dorman.