E40D Compared to 4R70W and 4R100
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Junior Member
Joined: Oct 2005
Posts: 7
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From: Butler, Pa
E40D Compared to 4R70W and 4R100
I have an 2002 F250 SCrew 4x4 Off Road with an E40D transmission. My question is: Why so many different transmissions? I have 30,000 miles on the truck and I've had to replace the torque converter clutch solenoid. When the shop had the pan off the bottom they said everything was clean and looked good inside.
I intend to pull a 28 foot camper trailer that weighs about 8000 lbs. I have heard that I should pull in over drive and that I shouldn't pull in over drive. I've read both sides of that issue on this site.
So .................. ah, what should I do when I'm towing something? Do I leave it in OD or do I take it out of OD?
I intend to pull a 28 foot camper trailer that weighs about 8000 lbs. I have heard that I should pull in over drive and that I shouldn't pull in over drive. I've read both sides of that issue on this site.
So .................. ah, what should I do when I'm towing something? Do I leave it in OD or do I take it out of OD?
Senior Member
Joined: Dec 2004
Posts: 5,003
Likes: 27
From: Dover AFB DE / Harrisburg PA
Howdy and welcome!
You don't have the E4OD, it was replaced in 1999 with the 4R100 which is an updated E4OD. The 4R70w is a light duty tranny. You might want to read through this thread...
https://www.f150online.com/forums/sh...d.php?t=211867
These trannys are ment to tow in any gear. Only lock out OD if it is hunting between 3rd and 4th. This usually happens in hilly roads, or driving at 45-50mph.
For that weight trailer, I would reccomend adding a tranny temp gauge...
This would allow you to be able to back off if the tranny hits over 200deg. The stock indash gauge is nothing but an idiot light with a needle and doesn't start to move untill you are already toast!
Adrianspeeder
You don't have the E4OD, it was replaced in 1999 with the 4R100 which is an updated E4OD. The 4R70w is a light duty tranny. You might want to read through this thread...
https://www.f150online.com/forums/sh...d.php?t=211867
These trannys are ment to tow in any gear. Only lock out OD if it is hunting between 3rd and 4th. This usually happens in hilly roads, or driving at 45-50mph.
For that weight trailer, I would reccomend adding a tranny temp gauge...
This would allow you to be able to back off if the tranny hits over 200deg. The stock indash gauge is nothing but an idiot light with a needle and doesn't start to move untill you are already toast!
Adrianspeeder
Senior Member
Joined: Nov 2005
Posts: 337
Likes: 0
From: San Diego, CA
You just want to avoid higher temps. If you see it shifting a lot between gears or see the converter slipping, then you want to take it out of OD. Note the unloaded cruising RPM in OD and 3rd at whatever speed you generally tow at and make sure it stays around there. If you see the RPMs go up, but not to where it usually is in 3rd, you want to take it out of OD. Prolonged driving with the converter slipping makes some big time heat.
Senior Member
Joined: Apr 2002
Posts: 167
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From: Mississippi
Yes, E40D and 4r100 are the same thing, just started calling it 4r100.
There were upgrades throughout the E40D' life and more upgrades in the 4r100.
4r70w came in 1/2 tons, cars, etc.
Sounds like you had a defective solenoid and should not be a concern with the transmission.
There were upgrades throughout the E40D' life and more upgrades in the 4r100.
4r70w came in 1/2 tons, cars, etc.
Sounds like you had a defective solenoid and should not be a concern with the transmission.