Flareside302

E4OD is stronger, takes a lot of ****.. As in a buddy had an 800 hp twin tubo 408 stroker in front of a stock e4od with just a valve body and converter upgrade and it lived for like 5 years..

7700SCREW

That's what I was saying...I just figured my post was going to be long enough I would start my history lesson at the e4od instead of the C6 because the focus is on the e4od.

Forge-World-FORD

But after the 4r100, it wasn't even the same transmission anymore. Meaning the transmissions you named beyond the 4r100 were part of a different transmission family.

7700SCREW

That is incorrect! They are all very different transmissions but are all in the same family!

the differences from the 3speed C6 to the 4speed 4R100 are pretty evident. Just like the 4R100 to the 6R140.

7700SCREW

Here a good way to see the differences in the Trans pans and identify an old for transmission if your hunting at the junk yard.

Forge-World-FORD

If by same you mean all automatics then sure.

C6
the C6 featured a simple, three speed Simpson planetary gearset as well as over 10*lb (4.5*kg) of powdered metal. To aid in shift quality and long time durability, it was the first automatic transmission designed to use the Borg-Warner flexible shift band.

E4OD
The C6 core components were used to build Ford's first electronically controlled automatic transmission. The E4OD was introduced in 1989 and used in both light and heavy duty applications. The E40D has four forward speeds and electronic shift controls replacing the hydraulic governor control mechanism of the C6.

4R100
The E4OD was updated in 1998 and this new transmission was the last rendition of the C6. It was largely the same as the E40D, but with some changes to internal components to address durability concerns when put behind the ever increasingly powerful Powerstroke Diesel Engine. In 1999 it was fitted with a PTO for auxiliary equipment attached to heavy duty trucks. To follow Fords new naming schemes for its other transmissions, Ford renamed the E4OD the 4R100

Forge-World-FORD

6R series(a successor to the c6 family, not part of it)

The 6R is a six-speed automatic transmission for longitudinal engine placement in rear-wheel drive vehicles. It is based on the ZF 6HP26 transmission[1] and is built under license by the Ford Motor Company at its Livonia Transmission plant in Livonia, Michigan. The 6R debuted in 2005 in the 2006 model year Ford Explorer and Mercury Mountaineer.

Forge-World-FORD

From what I can find the bigger 6r and 5r transmissions were/are used in super duty f series and the entire transmission for both are different from the c6 family.

7700SCREW

Wow you can copy and paste from google! Good for you! Lmao!
I'm not going to argue something so trivial.
You said it yourself there decedents of the earlier ford heavy duty transmissions.
I listed fords other current heavy duty transmissions, I didn't say they shared parts!

Forge-World-FORD

Wikipedia to be exact. The C6 family ended with the 4R100, that's the point I was making. You didn't say they shared parts but you said they were part of the same family, which they aren't.