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Blackb33

Power transfer unit went bad

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2016 mkx power transfer unit went bad. Wife was driving down the highway, said she smelled a bad smell, then smoke started coming out profusely of the back end of the car. She pulled over, got it towed to nearest Ford dealership, luckily right at the end of the power train warranty.  Don’t know much about the PTU, but just wondering with being at the end of the warranty, could something else go bad in the future because the PTU went bad or could other things have gone bad now because the PTU went bad??  Are there things I should make sure they look over before I leave the dealership service shop after it’s fixed?  

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Sorry to hear this happened to you but glad you had warranty left. Ive been through the Ford PTU saga myself. 

There are some seals they will replace also when they install the new unit.

Basically these PTUs get cooked surrounded by the Catalytic converter, engine and transmission because these model year PTUs have no cooling mechanism and very little fluid (the low fluid volume, in my opinion, is the root of the issue). You may as well do the rear diff. 

FordTechMakuloco does a while series on youtube about these PTUs.

FordFlex.net forum has extensive info on these PTUs but I found Makuloco the easiest to understand and fact based vs. Conjecture. 

 

Just curious how many kms/miles on your MKX?

Ford has included a service interval of 30000mi for PTU fluid change for "extreme duty" which mostly involves service vehicles (see heat issue - cooking the ptu fluid) 

 

I change my PTU oil every spring now myself now that I have a PTU with a drain plug. (Oh yeah I forgot to mention its in recent years a drain plug was added.)

 

Welcome to the PTU club (albeit not a very exclusive one)  ;)

 

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Ford Technical Service Bulletin (TSB) 18-2255 (August 22, 2018) addresses AWD Right Side Transfer Case Fluid Leak re: 2016-2018 MKX with 2.0L & 2.7L EcoBoost engines.

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Even though Ford/Lincoln does not have a recommended fluid change schedule, the fix for PTU failure is to have the fluid changed at 30,000 mile (or less) intervals. Annual change is better. About $80 for Ford to do this.

 

Your dealer should be able to do this, otherwise any local transmission shop can do. Make certain they replace with Motorcraft  OEM fluid.

 

Maintaining oil changes also play a role, but most people watch this pretty closely. 

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