The Ford Barn

wga · 02-09-2023, 11:03 PM

Searched the forum and online for the location of the drain plug for the
BW overdrive. Fill plug is there. Just below the fill plug there is what appears
to be a hex head pipe plug - is the drain plug?

.

Came across this article while searching around on the interweb:

https://www.fordification.com/tech/overdrive.htm

pistonbroke · 02-10-2023, 09:39 AM

On the stock Warner overdrives I have read and been told to just fill and drain through the normal transmission plugs. Having rebuilt many of these over the years I know with out a doubt the main case and overdrive case do share the same oil and it actually is circulated from one to the other continually while the car is in motion . Why Warner put those plugs in the OD housing I can only guess, but if you fill to the higher OD fill plug level you will have oil weeping out your input shaft in a ford and running out in the GM and Mopar application's. Yes, they all used the same warner overdrives with only outer case differences.
Been there done that, Tim

Dan in MI · 02-10-2023, 11:26 AM

Yes, that is the drain. See plug #353141-S in the attached picture.

Mac VP · 02-10-2023, 01:28 PM

It’s definitely a hex plug. If you decide to remove it, be sure to use the correct size Allen wrench…..we use the type that is a straight shot with a 3/8” drive. The socket is often filled with grease and dirt so you should pick that out before you attempt to insert the Allen wrench.

petehoovie · 02-10-2023, 01:33 PM

Quote:

Originally Posted by Dan in MI

Yes, that is the drain. See plug #353141-S in the attached picture.

wga · 02-12-2023, 09:55 AM

Sponsored Links (Register now to hide all advertisements)

Thanks for the info, no problem with the drain plug. FYI it is a 1/4" hex.

Where did you find that cutaway drawing? I'd like to purchase one.

02-09-2023, 11:03 PM	#1
wga Senior Member Join Date: Jul 2010 Location: Yorba Linda, CA Posts: 900	Overdrive Drain Plug Location??? Searched the forum and online for the location of the drain plug for the BW overdrive. Fill plug is there. Just below the fill plug there is what appears to be a hex head pipe plug - is the drain plug? . Came across this article while searching around on the interweb: https://www.fordification.com/tech/overdrive.htm __________________ Henry Ford designed the flathead without the aid of a computer.

02-10-2023, 09:39 AM	#2
pistonbroke Senior Member Join Date: Feb 2021 Location: Perry Mo. Posts: 486	Re: Overdrive Drain Plug Location??? On the stock Warner overdrives I have read and been told to just fill and drain through the normal transmission plugs. Having rebuilt many of these over the years I know with out a doubt the main case and overdrive case do share the same oil and it actually is circulated from one to the other continually while the car is in motion . Why Warner put those plugs in the OD housing I can only guess, but if you fill to the higher OD fill plug level you will have oil weeping out your input shaft in a ford and running out in the GM and Mopar application's. Yes, they all used the same warner overdrives with only outer case differences. Been there done that, Tim

02-10-2023, 01:28 PM	#4
Mac VP Senior Member Join Date: May 2010 Location: Cincinnati, OH Posts: 1,361	Re: Overdrive Drain Plug Location??? It’s definitely a hex plug. If you decide to remove it, be sure to use the correct size Allen wrench…..we use the type that is a straight shot with a 3/8” drive. The socket is often filled with grease and dirt so you should pick that out before you attempt to insert the Allen wrench. __________________ VANPELT SALES LLC Cincinnati, Ohio Office: 513-724-9486 www.vanpeltsales.com www.classictransmission.com

02-12-2023, 09:55 AM	#6
wga Senior Member Join Date: Jul 2010 Location: Yorba Linda, CA Posts: 900	Re: Overdrive Drain Plug Location??? Sponsored Links (Register now to hide all advertisements) Thanks for the info, no problem with the drain plug. FYI it is a 1/4" hex. Where did you find that cutaway drawing? I'd like to purchase one. __________________ Henry Ford designed the flathead without the aid of a computer.