4R70E rebuild
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5th Wheeling
Joined: May 2021
Posts: 29
Likes: 2
From: Buffalo
4R70E rebuild
Hello I’ve got a 2004, E-150, 5.4L V8, and I’m just starting my first ever attempt at rebuilding a transmission. I just got my 4R70E out of my 2004 E-150 and I onto my work bench. It’s a standard rear wheel drive. All the forward gears failed, but reverse was still working. From research I’ve done this is a common problem. I’m beginning disassembly and using the video series from transmission bench as a guide. Any advice/guidance/tips anyone can offer would be much appreciated! Thanks!
Cargo Master
Joined: Sep 2006
Posts: 2,120
Likes: 390
From: Evansville, Indiana
I was wondering if you have continued with your transmission disassembly. If so, what are your impressions at this point? I am faced with a similarly defective transmission.
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5th Wheeling
Joined: May 2021
Posts: 29
Likes: 2
From: Buffalo
Sun gear and Direct Clutch stuck in Planetary Gear Assembly
Hi everyone I’m hoping someone will be able to help me…
Working through the tear down on my 4R70E out of a 2004 E150. First time ever working on a transmission so I’m a newbie I’m giving it my best shot. Using the Transmission bench video series as a guide. It appears that my Sun gear is stuck in the planetary gear assembly. Also the direct clutch is stuck on the other side of planetary gear assembly. Has anyone ever encountered this before? If so do you have any tips on how to get them apart? The video did not cover this.
Thanks folks!
Working through the tear down on my 4R70E out of a 2004 E150. First time ever working on a transmission so I’m a newbie I’m giving it my best shot. Using the Transmission bench video series as a guide. It appears that my Sun gear is stuck in the planetary gear assembly. Also the direct clutch is stuck on the other side of planetary gear assembly. Has anyone ever encountered this before? If so do you have any tips on how to get them apart? The video did not cover this.
Thanks folks!
Transmission Rebuilder
Joined: Jul 2008
Posts: 1,570
Likes: 63
From: North Georgia
That kind of failure is very common on that transmission especially on the "E" series vans, you will end up having to buy the entire gear train, all thrust washers and the direct drum. If you can manage to get the direct drum off you might be able to save the internals of the drum like the snap rings, steels, pressure plate, piston and spring cage or you will have to find a "loaded drum".
The root of this failure is over time the rear suspension of the vehicle gets weak and these vans get overloaded and this causes the drive shaft to bottom out on the output shaft of the transmission, this causes too much force on the gear train thrust washers and they fail. We cut about a half inch off the output shafts in these vans to help prevent this from happening again.
The root of this failure is over time the rear suspension of the vehicle gets weak and these vans get overloaded and this causes the drive shaft to bottom out on the output shaft of the transmission, this causes too much force on the gear train thrust washers and they fail. We cut about a half inch off the output shafts in these vans to help prevent this from happening again.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,722
Likes: 2,648
From: SE Florida
The root of this failure is over time the rear suspension of the vehicle gets weak and these vans get overloaded and this causes the drive shaft to bottom out on the output shaft of the transmission, this causes too much force on the gear train thrust washers and they fail. We cut about a half inch off the output shafts in these vans to help prevent this from happening again.
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