MikeJinCO
Salida, CO
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Joined: 02/23/2007
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A tip from one of the Ford transmission gurus. With Pre 6.0 Fords with 4wd and 4R100 transmission, ie the 7.3 motor, they have a history of a weak first/reverse clutch. If you have to back trailer into a difficult or uphill location lock out the 4wd and put it into low range to take advantage of the torque multiplication. The '94-'98 AOD transmission is similar.
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Capt Skup
Southern Maryland/Nantucket
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Easily done with manual shift transfer case and manual hubs.
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skipnchar
Topeka Kansas USA
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Hummm...my 4R100 in my F-150 has a much stronger reverse in it than the Torque shift in my diesel so I'd take some exception to the original premise.
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hotpepperkid
Chino Hills CA
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I use 4L a lot while backing. I have manual locking hubs so I can easylly use 4L
hpk
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MikeJinCO
Salida, CO
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I have no idea about the torqueshift. One of the top transmission specialists in the country told me this for the 4R100 and its predecessor A4OD(I think). It is the number of clutch plates, ratio and the pressure in the transmission that determine the strength. The 7.3's have a history of wiping out the first/reverse clutches and this was just a tip for backing up trailers under difficult conditions to help prevent it. When rebuilding mine he machined out the clutch housing and added an additional plate/friction set.
I don't tow heavy, but few of my tows are easy. I live at the base of Monarch pass in Colorado so there is only one way out of the Arkansas valley that doesn't involve a pass. and we just pulled an 11% grade for 5 km out of the Urique River in Copper Canyon Mexico.
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67Airstreamer
Louisiana
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Joined: 12/03/2008
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MikeJinCO, excellent advice. Unfortunately, I don't have 4WD, and I have heated up my E4OD in reverse enough to spit fluid all over the campground.
That's why I added a front hitch: Perhaps first gear is no stronger than reverse, but the front hitch allows me to maneuver much easier into very tight spaces, thus lessening the amound of slow-speed pressure on my old slushbox.
If I even burn out this old unit, I'll probably invest in a Brian's Truck Stop superbuild. It will cost about as much as the 1996 truck is worth, but, the rebuild will remove all the weak points of the original design, such as those weak first and reverse gears.
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SoCalDesertRider
SanDiego, CA, USA
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The predecessor to the 4R100 ('99-'02) was the E40D (early 90's to '97). The AOD/AODE/4R70/4R70W were completely different transmissions from the E40D/4R100. The E4OD design was based on the C6.
My truck has a C6 and manual shift transfer case and manual locking hubs. I often use 4-Low with the hubs un-locked when backing the trailer up the steep incline in the yard where I keep it. Works great and alot easier on the transmission, engine and much more control when manuevering around the other cars, trees, boulders, sheds, corral, etc that also occupy the yard.
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larry barnhart
wenatchee. wa usa
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the high reverse gear ratio also helps cause the overheating and dumping of the trannie fluild.
chevman
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SoCalDesertRider
SanDiego, CA, USA
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larry barnhart wrote:the high reverse gear ratio also helps cause the overheating and dumping of the trannie fluild.
chevman
That's why it's nice to have 4wd with manual locking hubs. I put the t-case in 4-Low and leave the hubs un-locked and I have instant very low ratio gearing that doesn't stress out the tranny or make the motor work so hard, also allows greater control at slower speeds when manuevering the truck/trailer. 4.56 axle gearing helps too! 
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SoCalDesertRider
SanDiego, CA, USA
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Oops! I forgot I already said that!
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