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2004 f150 4r70 codes and slips

Projectjunkie

Whatever
Joined
May 19, 2020
Member Number
306
Messages
3,006
Loc
Tucson Az
Buddies truck is slipping, then pops up "trans fault "

P0720 output speed sensor and p2106 derate

4.6 2wd 205k

I pulled the pan, the fluid isn't terribly burnt, and there was minimal junk in the pan and filter (not much junk to speak of)
I blew the filter out with brake clean and topped off. Still fuckered.

Some googling leads to a potentially cracked drum letting the clutches slip

He's at a crossroads with its the truck worth a new trans and needs to make some choices.

I can't get married to this thing turning over every stone, I've got plenty of my own busted shit to fix.

In the meantime, am I on the right track here? Or is there anything else simple to check?
 
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