F-350 Supeer Cab, long-bed, dually, with towing

It does have a towing package right? A button on the end of the gearshift that you push in when towing? It sounds like it is in too high of gear. Maybe trans fluid gets hot and turns on the light? If it dont have the towing package? Are you keeping it in overdrive? Shift it down manually and keep it in 3rd when hauling any kind of weight.
Not sure if this helps but I know peopl that have burnt their transmission out pulling trailers in O/D

Sounds like the front seal leaked some fluid. If I remember right the tranny cooler in that year is less than adequate for towing. The "puking" seems to happen when your jogging the trailer into position, shifting from drive to reverse and not moving very fast. One fix is to install the 6.0 aux cooler and another is to install an aftermarket cooler. My '94 F350 did this on a 123 degree day when I was trying to jostle my 9,000 lb fifth wheel into my friends front yard. I lost about 1/2 qt. replaced it and it hasen't leaked since..that was about 2 years ago.

THERE IS A REVERSE BOOST VALVE IN THE PUMP THAT GETS WORN AND THE OIL WILL BYPASS AROUND IT COMPANY CALLED SONNAX MAKES THE VALVE THAT I USE

87 thru 91 should be ok

you should be able to tow it with the transfer case in the nuetral position.

look in the driver door it will tell you i pull a gooseneck with 30000 on it all the time with no prolbem my wieght is 30000

hob may be slitly different

 u can get it from google.com

iam having the same problem did u figure it out

http://www.mvreader.com/multiview/dayco/catalogSearch.php?autoCatalogSearch=1&make=FORD&model=F-350%20SUPER%20DUTY&year=1999&year_from=&year_to=&engine=All&l=n

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