pre-emptive transmission bulletproofing ...

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Feb 13, 2007 | 03:41 AM

#16

Posting Guru

Joined: Sep 2001

Posts: 1,539

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What year had this "diode" issue? Only certain 01's?

Anyone know if 03s really got a beefed up transmission? My 03 limited has a trans gauge, does that mean i have the tow package? I have regular mirrors with the lil red arrows.

Feb 13, 2007 | 08:40 AM

#17

aklim

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Joined: Jan 2006

Posts: 7,308

Likes: 250

From: Hartford, WI

Quote:

Originally Posted by 1

The 2001 Models built for August 2000 to March 2001 are the ones with a mechanical diode, all other models have a 34 element sprag from the factory. All Monster Boxes, irregardless of year are built with the 45 element sprag assembly. A mechanical diode is one form of a one way clutch. When the E4OD came out in 1989, it had a sprag one way clutch on the top of the direct drum, and it worked great for 12 years. So Ford in 2001 changed it to the mechanical diode, which didn't work great and after literally 8 days, they realized it was not going to work. The only problem was that all the tooling for the original sprag was destroyed already and it took Ford 6 months to get new machines to go back to the way that they always were. The units built during those 6 months are the diode units. The diode has a different clutch plate pattern, different direct drum and an integral race. To replace one with a sprag, you need to replace all these parts.

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