Does anyone know the size pipe-plug the DRAIN hole on the transfer case requires?


I've been doing some maintenance and noted that one of the PO's have all but stripped the plug installation/removal square hole.


I could just run to the store but, this is my only transportation and it took over an hour to get it out.


The other option is to put it in somewhat loose and remove it in a parking lot. Hoping it doesn't loosen on the ten mile trip and all the fluid drain out.

Otherwise I can just have the Wife pick it up.

99 f250 - 100% stock

 

Correction:

Finally found it, here is the Dorman part number and spec.


090-097
Pipe Plug C.S. Square 1/2-14 Npt, Head Size 3/8 In.



And I thought the transfer plugs were 10mm hex drive....

 

They are square drive on the transfer case I believe. Just like the differential.

To the poster, you could swap the upper and lower ones. The top one will not leak if you have it in there loose like you mentioned, since the fluid is below it. This would buy you some time and allow you to refill the case.

 

these are different size's. Smaller one-top and a large one-bottom. The dealer does not have them and does not know where to attain one. So, I'm calling a plumbing supply house.


Thanks

 

Don't forget the best sealant out there for threaded oil plugs.

Gasoila Diesel Rated Paste Thread Sealant 2oz tube

 

No one could match the plug. Looks like a Plug to me with a Hexagonal Bore. What do I know.


I did find it finally.


1 (10939)QU10939 TRANSFER CASE PLUG $10.15


Dealer does not have one for a 1999 F-250. "Discontinued Part"


But they got a bunch for a 2005. Same Transfer Case #273(F) / 272 (Lowest Gear). That was strange.


BTW: (F) just indicates Ford. These are across all manufacturer lines (CJ) Chrysler-Jeep, etc.


Thanks for all the help!

 

I was able to find the Ford part number for my 02’ f350 and a dealer that had one. If you have a 99.5’ year truck I’d imagine the number is the same.
transfer case drain plug- 6C3Z7A010A

during this search I also found the transmission drain plug number also if anyone needed it.

transmission drain plug- F81Z7A010A

 

Old thread revival time! Does anyone know for certain what the dimensions are? Like the OP, I also went all over town to find a replacement, thinking it was a basic pipe plug... no dice.

Every plug on my truck takes a 3/8 ratchet or extension end to remove. Square drive. But Ford in their infinite wisdom figured you need to have multiple different tools with you when you go underneath to do fluid services. 🙄

 

After spending a half day going to auto parts, transmission, driveline, and general hardware stores... plus internet research... I've determined it is a metric size M22 X 1.50 (the same as a Ducati motorcycle or BMW engine oil plug.) Several Kenworth, Peterbilt, and International commercial trucks use this size for differential drain/fill plugs also.

 

Excellent research performed there @F350JOHN . We should add this to the Fastener Size Chart 14DEC21 in the Tech Folder.