Drum 6F15 4-5-6 and 3-5-R Clutch FORD 1.0L EcoBoost 120PS / 125PS / 140PS 2181334 GN1P7000SB (3-5-R pack for 2 friction plates)

Drum 6F15 4-5-6 and 3-5-R Clutch FORD 1.0L EcoBoost 120PS / 125PS / 140PS 2181334 GN1P7000SB (3-5-R pack for 2 friction plates)
The FORD 6F15 transmission is structurally a copy of the FORD 6F35 transmission, but has characteristic differences.
The main emphasis in the design of the 6F15 was placed on maximum lightening of all transmission units and adaptation to low-power 1.0L EcoBoost 120PS / 125PS / 140PS engines that are used on cars:

• Ford Fiesta CE1 2017- FWD
• Ford Focus CEW 2014- FWD
• Ford Ecosport CR6 2017- FWD. 

Let's look at the differences using the example of the 4-5-6 and 3-5-Reverse clutch drum. The first thing that catches your eye is the number of steel and friction plates and the location of the 3-5-R pack retaining ring on the outside of the drum

6F15 pack 3-5-R consists of:

• Single pressure plate (outer diameter 173mm; thickness 6.20mm; 24 teeth)
• Two friction discs (inner diameter 145.20mm; thickness 1.6mm; 36 teeth)
• Two steel discs (outer diameter 173mm; thickness 3.30mm; 24 teeth)
• Wave-shaped spring disc.

6F35 package 3-5-R consists of:

• Single pressure plate (outer diameter 173mm; thickness 6.20mm; 24 teeth)
• Three friction discs (inner diameter 145.20mm; thickness 1.6mm; 36 teeth)
• Three steel discs (outer diameter 173mm; thickness 3.30mm; 24 teeth)

Steel, friction and pressure discs are absolutely the same in size and are interchangeable.
Since the packs have a different number of discs and the same dimensions, the total thickness of 3-5-R packages in transmissions is different for 6F15 it is 16 mm without the spring wavy disc and for 6F35-21.80mm, respectively. Places of installation of the retaining ring of the 3-5-R package on the outer part of the body are at different heights.

Therefore, the drums themselves are not interchangeable. Drum hub 4-5-6 / 3-5-R does not have the same design features for the two transmission models.
As for the clutch package 4-5-6, it is exactly the same for both 6F15 and 6F35. Steel, friction and pressure discs 4-5-6 have exactly the same dimensions and are interchangeable