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Guest Message by DevFuse

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Register your Fusion Hybrid at the official Ford authorized registry here.

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High Transmission Temperature


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123 replies to this topic

#121 OFFLINE   hybridbear


    Fusion Hybrid Fanatic

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  • Region:U.S. Northern Plains
  • Location:Minneapolis, MN
  • Current Vehicle:2013 Focus Electric, 2013 Fusion Energi Titanium
  • My Hybrid's Year:2013

Posted 16 August 2015 - 04:40 PM

I discovered something interesting regarding the TFT pump in the Workshop Manual today.


  • This transmission has one simple planetary gear set. The planetary gear set is used to match the vehicle speed to the desired engine speed for maximum efficiency.

  • The ring gear is connected to the transmission final drive though the middle gear on the transfer shaft. The ring gear rotates when the vehicle is moving.

  • The planetary carrier is splined to the transmission input shaft and is connected to the engine. The carrier rotates with the engine crankshaft. The planetary carrier is also used to drive the hydraulic fluid pump.

  • The sun gear is splined to the generator/starter.


Edited by hybridbear, 16 August 2015 - 04:40 PM.

  • ptjones, GrySql and Hybrider like this

Current Vehicles

2013 Ford Fusion Energi Titanium - White Platinum Metallic

2013 Ford Focus Electric - Ice Storm



Previous Vehicles

2013 Ford Fusion Hybrid SE x2


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#122 OFFLINE   billford


    Fusion Hybrid Enthusiast

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  • Region:U.S. Pacific Coast
  • Location:Seattle
  • Current Vehicle:None
  • My Hybrid's Year:2014

Posted 17 August 2015 - 12:43 AM

Here is my first step to trying to cool off TFT using 3/4"X6" aluminum L bracket and glueing them to bottom of Transmission. It will take atleast 3/4 hour FWY drive to see if it makes a difference.  This also adds 54 square inches of surface cooling area. smile.png
High Temp Silicon Rubber glue and 6" X 3/4" Aluminum L brackets
Trans with no fins.
Trans with fins.

Interested to know if this helped in any way...

#123 OFFLINE   lolder


    Fusion Hybrid Addict

  • Fusion Hybrid Member
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  • Region:Decline
  • Location:Florida
  • Current Vehicle:2010 FFH 501A Trim
  • My Hybrid's Year:Decline

Posted 17 August 2015 - 08:34 AM

The planetary carrier is connected to the ICE so the pump only turns when the ICE is running.

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#124 OFFLINE   ptjones


    Fusion Hybrid Enthusiast

  • Fusion Hybrid Member
  • 786 posts
  • Region:U.S. Southern Atlantic
  • Location:Atlanta area
  • Current Vehicle:2013 CMAX SEL
  • My Hybrid's Year:2013

Posted 17 August 2015 - 09:19 AM


Interested to know if this helped in any way...

It appears to help about 5*F with comparing TFT before and after.  I did drill some holes behind the Trans in the ICE cover to promote air circulation. :)




Edited by ptjones, 17 August 2015 - 09:45 AM.

163299.png 600 Club

Current Record:  12/30/2014  902.2 mi.  63.8 mpg  14.13  gal. (Actual GPS:  922 mi.  68 mpg  13.5 gal.

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