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Equipment & Gear => Power Equipment & RV => Topic started by: hhack on April 20, 2021, 04:44:09 PM

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Title: 2001 Excursion 7.3 transfer case fluid
Post by: hhack on April 20, 2021, 04:44:09 PM

The seal from my transmission to transfer case is broken and leaking. How bad is this if I keep adding transmission fluid Mercon V.  What is recommended transfer case fluid to use? Thank you! Some people saying mercon Ford says motorcraft xl-12. But assuming I’m leaking tranny fluid into transfer case what should I be topping off with in tranny? When I pull check plug on transfer case tranny fluid is pouring out.

Title: Re: 2001 Excursion 7.3 transfer case fluid
Post by: Woodchuck on April 20, 2021, 05:18:25 PM

Leaks do not get better with time and miles, at some point it will eat the trans and maybe the transfer case as well.  :twocents:

Title: Re: 2001 Excursion 7.3 transfer case fluid
Post by: hhack on April 20, 2021, 07:16:38 PM

I’m on a limited budget and need my truck. What kind of tranny fluid should I be topping off with assuming it’s leaking into transfer case?

Title: Re: 2001 Excursion 7.3 transfer case fluid
Post by: mazama on April 20, 2021, 09:39:26 PM

Whetever works in the transmission will work in the transfer case,transfer case is not as picky as the transmission.

Title: Re: 2001 Excursion 7.3 transfer case fluid
Post by: huntnphool on April 20, 2021, 11:30:59 PM

How many miles on it?

Title: Re: 2001 Excursion 7.3 transfer case fluid
Post by: MR5x5 on April 21, 2021, 11:50:26 AM

Great forum for all things 7.3

https://www.ford-trucks.com/forums/forum31/

Title: Re: 2001 Excursion 7.3 transfer case fluid
Post by: hhack on April 21, 2021, 03:21:05 PM

Thanks for the replies 215k if it was your truck what type of tranny fluid would
You use assuming it’s leaking into transfer case

Title: Re: 2001 Excursion 7.3 transfer case fluid
Post by: MR5x5 on April 21, 2021, 03:34:01 PM

From a trusted X-Ford Transmission engineer.

"You may use either conventional or synthetic ATF, as long as it is rated MERCON or MERCON V. Your Owner’s Guide says to not use MERCON V, but Ford changed that in 2006."

Title: 2001 Excursion 7.3 transfer case fluid
Post by: jackelope on April 21, 2021, 05:59:45 PM

Mercon V in the transmission or the t case.

Or LV.

Title: Re: 2001 Excursion 7.3 transfer case fluid
Post by: hhack on April 21, 2021, 09:39:42 PM

Boom thank you guys!!!!!!!