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Hf35 Rebuild Help


Pyaelo
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Hey guy's I'm a in a bit of a dilemma. So one of my rear motor mounts bolts snapped in the transmission housing and thought it would just be easier to replace the housing part #(DG9P-7976-CC). While pulling the housing I accidently pulled the Electric motor input shaft and intermediate shaft. I see there are blue marks on the gears. Do shaft gears teeth have to align with one another or can I just place them in without aligning them specifically? I work on cars a lot but never on a transmission so I'm not sure where to go from here. All transmission shops near me are booked for a couple of weeks. Here is picture below of the gear's/shafts I'm talking about and the other is my snapped housing. If anyone has a link to manual or where I can purchase one that would be greatly appreciated. Thanks ahead. 

hf35.png

20220518_171239.jpg

Edited by Pyaelo
Made it a bit clearer
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  • 1 year later...

I just "rebuilt" the HF35 in our 2013 C-Max Energi (222,5000 miles) in that we replaced all four roller bearings, which were badly spalled.  We did not index-mark any of the gears, and since they are all concentrically uniform, I can't forsee any issues.  Learned a LOT from this process.  If I could find all of the related torque-values somewhere, I could start a side-hustle.  NOTE: Be sure to buy Ford-branded bearings.  I didn't, and the BT4Z-4221-A equivalent I had purchased would not seat on the gearshaft, even using a 20-ton press.  Removed that POS and replaced it with a new Ford P/N BT4Z-4221-A, and it dropped right on (heat bearing to 375 degrees F in an oven and chill the gearshaft with a chunk of dry-ice, for 30 minutes.

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On 7/27/2023 at 10:59 PM, the428 said:

We're you able to remove the transmission from the car without removing the engine?

T

The transmission can be removed without pulling the engine; however, you should use a "cherry picker" to support the engine from the lift bracket found on top of the engine, then disconnect the motor-mount on the passenger side of the engine bay.  This allows the 1/4" movement (towards the passenger side) you will need to get the transmission out.  Unlike the Ford Fusion Hybrid, Ford engineers did not leave enough space in the engine bay to allow safe removal of the transmission with the engine fully-installed.  It is literally that tight in the C-Max engine bay, and that is why Hybrid & Electric Car Sales out of Franklin, TN, charges $500 more than the identical FH35 transmission repair service, compared to the Fusion.  If anyone wants to attempt a repair of their HF35, I'm happy to share what I learned going through the entire process, in my garage, with the help of none other than my amazing brother-in-law, Steve.

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