my tranny slips into second.
Laughing Gas
Joined: Jul 2003
Posts: 1,157
Likes: 1
From: Littleton, Colorado
Sounds like a forward clutch failing. Also the 2001 had a problem with the Intermediate One Way Clutch (mechanical diode style) not operating properly.
The symptoms 99% of the time are delayed, slipping or no second gear problems. I don't know if you are aware of the TSB that was put out on it.
Follow this link for the info:
https://www.ford-trucks.com/tsb/full...hp?tsb=01-13-5
If you take care of it before too long, you still could get a lot of use out of that transmission. If you don't, there will definitely be a new transmission in your near future.
good luck,
Austin
The symptoms 99% of the time are delayed, slipping or no second gear problems. I don't know if you are aware of the TSB that was put out on it.
Follow this link for the info:
https://www.ford-trucks.com/tsb/full...hp?tsb=01-13-5
If you take care of it before too long, you still could get a lot of use out of that transmission. If you don't, there will definitely be a new transmission in your near future.
good luck,
Austin
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,722
Likes: 2,648
From: SE Florida
It certainly isn't the forward clutch. If that were failing it would slip in 1st gear, not during the 1-2 shift. It most likely is the mechanical diode failing. That's going to take a rebuild to fix.
Posting Guru
Joined: Sep 2007
Posts: 1,715
Likes: 2
From: Seneca, SC
Mine does it too. It has done it since I bought it. I don't have any clue why it does it, and its not really that noticeable most of the time. It only seems to do it at WOT so im not too worried about it.
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
Not trying to dispute you but just wanting to know more. Thanx
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,722
Likes: 2,648
From: SE Florida
The mechanical diode has several places where the inner race and outer race connect. Not all of them engage all the time. Sometimes one or two of the connectors break and it starts intermittently not working correctly. Sometimes more than the connectors break and the mechanical diode has a catastrophic failure. That's probably what happened to yours. There can be a lot of localized friction when it fails and that can burn the ATF without making the whole trans super hot.
