trans fluid leaking out of bell housing

[D3R3K]

was pullin hay wagon yesterday and noticed a line on the road where i pulled in, and the trans was peeing fluid out of the open notch under the bell housing. does anyone know what causes this??

[M90Ranger]

Yes, Usually it's because the converter is getting too hot.
It will usually stop leaking when it cools down. This will confirm that it's getting too hot.
There is a TSB for your year truck for this concern:

1999-2000 SUPER DUTY F SERIES
2000 EXCURSION


This article applies only to 1999-2000 Super Duty F-Series vehicles equipped with a 6.8L or 7.3L engine built 1/5/1998 through 2/6/2000, and 2000 model Excursion vehicles equipped with a 6.8L or 7.3L engine built 7/1/1999 through 2/6/2000.

ISSUE:
Some vehicles, equipped with 4R100 transmissions, built prior to 2/6/2000 may benefit from additional cooling during heavy duty use conditions (i.e., snow plowing, towing, carrying heavy loads.) A revised transmission Fluid Filter/Cooling Kit has been developed to aid in fluid cooling.

ACTION:
Replace radiator, cooler lines, and hoses for transmission fluid cooling system with current level parts on vehicles built prior to 2/6/2000, ONLY WHEN transmission hardware confirms customer condition of inadequate transmission cooling. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

If vehicle requires service, repair any transmission damage as required.

If inadequate transmission cooling is suspect:

Replace radiator, cooler lines, and hoses with current level parts. The radiator has an internal transmission fluid cooler.
For removal, refer to appropriate model/year Workshop Manual.
For installation, follow procedures listed in the appropriate model 2001 Workshop Manual.
Once the transmission fluid cooling system has been updated, install the Transmission In-Line Filter Kit (XC3Z-7B155-AA) per TSB 00-23-10. Follow the instructions included with the filter service kit.

PART NUMBER PART NAME
YC3Z-7N291-AA Clip - Transmission Oil Cooler
YC3Z-7R081-AA Hose Assembly
YC3Z-7A031-AA Tube Assembly
YC3Z-7A031-CA Tube Assembly
YC3Z-8005-BA Radiator Assembly
XC3Z-7B155-AA Filter Kit - Transmission In-Line



OTHER APPLICABLE ARTICLES:

[HillClimber350]

Is there one that applies to 2001's cause mine started doing the same thing today. Date of manufacture is 3/01

[D3R3K]

they tech from ford told me that it is lack of trans cooling, and it leaked from the torque converter seal, and best thing to do is upgrade the cooler and replace the seal.

[Byrnedw]

I had the same problem on my 99. My trans shifted fine, had no trouble codes, or excessive heat build up so I simply changed the front seal to a viton type. The leaky seal was gray, and has been mentioned in numerous posts as troublesome. Labor intensive but relatively cheap

[F350none]

I had one do that to me years ago. Put a load on the truck and the front seal on the tranny blew. Then it was $750 at a Ford Dealer. That was 2002 or so and the truck was a 99 or 00.