Differences, 4R70w & 4R100?
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Joined: Jun 2020
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4r100.
This is doubtful. Most F150's, including most of the newer 7700's got the 4R70 transmission. Check the transmission code on the door sticker on your truck. The letter under "TR" indicates which transmission you got. A "U" is the 4R70, an "E" is the 4R100. The only F150's that really got the 4R100 are low emissions versions sold in states like California. The 4R70 is not low emissions certified.
As for the differences? Size for one. The 4R100 is a much larger transmission physically. The 4R70 is also rated for 700 lb/ft of torque (70 x 10) whereas the 4R100 is rated for 1000 lb/ft of torque (100 x 10).
The 4R100 is a much stronger transmission. There are a ton of variations on the 4R100 (depending on whether it is in a regular F150, a Lightning, a diesel, or whether it has a power take off just to list a few).
The 4R70 can be built pretty strong, but the stock unit leaves a lot of room for improvement. The same can be said for the 4R100, but it starts out a lot stronger and can be built up further.
-Don
As for the differences? Size for one. The 4R100 is a much larger transmission physically. The 4R70 is also rated for 700 lb/ft of torque (70 x 10) whereas the 4R100 is rated for 1000 lb/ft of torque (100 x 10).
The 4R100 is a much stronger transmission. There are a ton of variations on the 4R100 (depending on whether it is in a regular F150, a Lightning, a diesel, or whether it has a power take off just to list a few).
The 4R70 can be built pretty strong, but the stock unit leaves a lot of room for improvement. The same can be said for the 4R100, but it starts out a lot stronger and can be built up further.
-Don
