Torque ratings of 4r70w and 4r100 trannies?
Senior Member
Joined: Mar 2000
Posts: 1,740
Likes: 22
From: SE Florida, USA
There is a blue tag in the driver's door area. Under "TR" there will be either a "U" or an "E". The "U" is 4R70W and the "E" is E4OD/4R100.
The transmissions are not interchangeable. They are physically different sizes, so bolting them in would take some modification.
The hard part is that the wiring is different and the computer programming is VERY different. If you did get one installed and wiried, you'd be on your own to develop a computer to operate the transmission.
The transmissions are not interchangeable. They are physically different sizes, so bolting them in would take some modification.
The hard part is that the wiring is different and the computer programming is VERY different. If you did get one installed and wiried, you'd be on your own to develop a computer to operate the transmission.
Member
Joined: Sep 2000
Posts: 25
Likes: 1
From: Decatur, Il.
Trannies availability
I know when I was looking for a truck nearly 3 years ago I was told the '98 F250 would be the last to have the E4OD or 4R100. The newer ones, including the 7700 that replaced the F250 would have the 4R70W, hence, I picked up on the '98. After owning many Torinos and Mustangs with the C6 I am a believer in the E4OD.
Senior Member
Joined: Jun 2001
Posts: 276
Likes: 0
From: Okc,OK,USA
How is it that the L's have the 4r100 as well as some of the 4x4's and screws? I have the 7700 lb payload group w/ the tow haul pacakge and the 4r70 transmission. It's a reg cab stepside 4x2. From an engineering standpoint how come ford can use both transmissions in this truck and be cost effective? It seems like it would be difficult to manufacter trucks with 2 different sized tunnels for two different trannys. The computer programming has to be able to be done somewhere I am sure. Bolt patterns are the same they are just different in physical dimensions. So it should just be a bolt up project w/ the exception of the programming.
Senior Member
Joined: Mar 2000
Posts: 1,740
Likes: 22
From: SE Florida, USA
The tunnels are sized to fit the 4R100. The 4R70W is smaller, so there is just extra room around those transmissions.
The programming is very different between the two transmissions. There is a unique program for each.
Getting a PCM that controls the correct engine and transmission can be challenging. If you come up with a combination that Ford built there will be a PCM available. If not, it can be rather difficult to get something that properly controls the transmission.
The programming is very different between the two transmissions. There is a unique program for each.
Getting a PCM that controls the correct engine and transmission can be challenging. If you come up with a combination that Ford built there will be a PCM available. If not, it can be rather difficult to get something that properly controls the transmission.
Junior Member
Joined: May 2004
Posts: 3
Likes: 0
From: Austin, Texas
I was wondering what these transmissions are capable of handling and do they have a good track record?
I'm used to 700R4 (4L60E), TH350 and TH400 (4L80E) GM trannies which are extremely reliable and predictable, especially when built right. And they're not expensive to build correctly.
I'm used to 700R4 (4L60E), TH350 and TH400 (4L80E) GM trannies which are extremely reliable and predictable, especially when built right. And they're not expensive to build correctly.
There is nothing reliable about a GM transmission, especially the old TH series.
