dajo2012 Posted May 24, 2021 Report Share Posted May 24, 2021 Replacing the entire oil cooler is not acceptable. I think I will take the PDF into my dealers parts department and ask them to get the nuts. I suspect that they have not had this come up yet and may not have a clue. Quote Link to comment Share on other sites More sharing options...
ST Road Runner Posted June 17, 2023 Report Share Posted June 17, 2023 My 2019 Edge ST has two rubber caps as highlighted by the 2 red arrows. Are these where a cooling unit would connect? Irritating that 2018s have a drain plug and for 2019 they dropped it. Quote Link to comment Share on other sites More sharing options...
Fingernip Posted June 21, 2023 Report Share Posted June 21, 2023 (edited) On 6/17/2023 at 1:41 PM, ST Road Runner said: My 2019 Edge ST has two rubber caps as highlighted by the 2 red arrows. Are these where a cooling unit would connect? Irritating that 2018s have a drain plug and for 2019 they dropped it. Is this a US spec edge? My 2019 has the additional cooling for the PTU. All marketing material listed it as a liquid cooled PTU for the ST in my region (Newengland) Edited June 26, 2023 by 1004ron Quote Link to comment Share on other sites More sharing options...
CTEdgeST Posted June 22, 2023 Report Share Posted June 22, 2023 (edited) Yes, that is a PTU cooler with the ports plugged. My 2020 ST has a simple plug that was installed rather than the capped cooler. It appears that your Edge was built at some time during the transition from cooled to non cooled PTU's in Edge ST's This is what the cooler looks like: https://www.rockauto.com/en/moreinfo.php?pk=11176489&cc=3444713&pt=2088&jsn=565 Read this link for my experiences, Ford diagrams and part numbers: https://www.fordedgeforum.com/topic/31746-2020-edge-st-ptu-fluid-drain-fill/ Edited June 22, 2023 by CTEdgeST 2 1 Quote Link to comment Share on other sites More sharing options...
ST Road Runner Posted June 23, 2023 Report Share Posted June 23, 2023 Fingernip - Yes the picture is from a U.S. Edge. CTEdgeSt - Perfect. Thank you for the picture of the cooler at Rockauto and the other post detailing your drain and fill! Looks like I just need to purchase the purchase the cooler plug kit (K2GZ-7A010-M), remove the cooler, let her drain and then replace with the cooler plug kit. Super write-up and pics on your post. Thanks for sharing! Quote Link to comment Share on other sites More sharing options...
ST Road Runner Posted June 23, 2023 Report Share Posted June 23, 2023 CTEdgeST - Is the PTU fill plug a TP-50 torx bit? Quote Link to comment Share on other sites More sharing options...
CTEdgeST Posted June 23, 2023 Report Share Posted June 23, 2023 Quote Is the PTU fill plug a TP-50 torx bit No, it is HW8 metric hex. I don't know how long the cooler assembly is so I would be slightly concerned that it might run into the cross brace located directly behind it before it clears the PTU housing. You can probably make a good estimation by measuring the length of the bulge for the cooler on the housing and comparing that to the distance from the face of the cooler boss on the PTU to the brace. Quote Link to comment Share on other sites More sharing options...
ST Road Runner Posted June 23, 2023 Report Share Posted June 23, 2023 CTEdgeST - Thanks you for the add'l info and heads up on the potential clearance issue. I also greatly appreciate the photo. Quote Link to comment Share on other sites More sharing options...
TourGuide Posted June 24, 2023 Report Share Posted June 24, 2023 When I was working with an independent shop on this - their tech had worked on these at the dealership and had said that removing the cooler would involve taking the cross member out - but that may have involved other obstructions like the lines that are supposed to be attached to your Edge, but are not. From what I saw on the cooler I looked at - it appears to run most of the length of that shape on the case. It is infuriating that these things don't have drain plugs - what a screw up. The other problem with these PTUs is straight up the volume of fluid - there just isn't enough of it. Quote Link to comment Share on other sites More sharing options...
CTEdgeST Posted June 24, 2023 Report Share Posted June 24, 2023 (edited) ST Road Runner, I guess you have at least 4 options: 1) The cooler comes out with no issue. Even if you can't remove it by pulling it straight back, you might be able to turn it so that the tubes move into the open space to the left and above the cooler mounting bore. If so, the cooler may clear the cross brace. 2) Even if the cooler can't be removed due to interference with the cross brace, it will still come out far enough to allow you to drain the fluid and then put the cooler back in place. 3) Move the cross brace to allow removal of the cooler 4) Replace the cooler with the plug like mine after forcing the cooler out without moving the brace. Good luck, let us know how it went once you have completed the drain and refill. Edited June 24, 2023 by CTEdgeST Quote Link to comment Share on other sites More sharing options...
ST Road Runner Posted June 26, 2023 Report Share Posted June 26, 2023 Thanks CTEdge! Going to get with a friend that has a lift and determine the best course of action to remove the cooler. My preference will be to replace with the cooler plug cover, since it has a magnet to help catch the metal shavings and should make future drain much easier. Hope to get this figured out over the next couple weeks and will report back. Quote Link to comment Share on other sites More sharing options...
ST Road Runner Posted July 21, 2023 Report Share Posted July 21, 2023 Ended up working with a friend at my local NAPA service center. Unfortunately the cooler could not be removed due to interference with the cross brace, but they were able to get it out far enough to drain the fluid and then refill at the fill plug. I have 56K mostly gentle miles on my ST. The oil was captured in a container for inspection and they noted it came out looking pretty good with a small amount of metal filings. Total charge $152. Thanks to all for your input! 1 Quote Link to comment Share on other sites More sharing options...
WWWPerfA_ZN0W Posted July 25, 2023 Report Share Posted July 25, 2023 @ST Road Runner wouldnt happen to have pics of the old fluid, would you? also what new fluid did you go with. most probably go motorcraft, being gen 2.5 Quote Link to comment Share on other sites More sharing options...
ST Road Runner Posted July 27, 2023 Report Share Posted July 27, 2023 Sorry no fluid pictures. I should have ask him to take one when I dropped the car off - Next time. Yes Motorcraft 1 Quote Link to comment Share on other sites More sharing options...
WilkiST Posted May 15 Report Share Posted May 15 Very interesting thread here. I just got my 2022 ST and am very interested in PTU related issues. So far i know PTUs on 2019+ Edges are way different to the one in previous years. I hope i will be able to look under my car in some days and provide with real photos. For the moment this what i found regarding PTUs for confused owners, like me. PTU description: The Power Transfer Unit (PTU) is a gearbox that attaches to the transmission. The PTU directs power from the transmission differential case through a dog clutch to a hypoid ring gear. A hypoid pinion gear is meshed to the ring gear and splined to the output flange. A dog clutch is used to transfer drive torque from the input shaft to the ring gear. When the dog clutch is released, no torque is transferred through the ring gear and pinion to the rear driveshaft. When the dog clutch is engaged, normal AWD function is achieved by directing torque to the rear wheels as needed to prevent or control wheel slip and improve handling There are two different models of the PTU. The low torque PTU is paired with the 8F35, 8F40, and MMT6 transmissions. The high torque PTU is paired with the 8F57 transmission. The low torque and high torque PTUs are similar in design and operation. And some drawings: Item & description: 1 - Vent tube. Unique routing for each powertrain. 2 - PTU to transmission bolt for 8F35/40 & MMT6. One-time use. 2 - PTU to transmission bolt for 8F57. One-time use. 3 - Heat shield bolt 4 - Heat shield 5 - PTU to engine bracket bolts. Unique parts for each powertrain. 6 - 7B664 PTU to engine bracket. Unique parts for each powertrain. 7 - Oil temperature sensor harness bracket (If equipped). 8 - Oil temperature sensor harness bracket bolt PTU cooling system - if equipped: Item & description 1 - Fan and bracket assembly 2 - Fan and bracket assembly bolt Item & description 1 - Oil-to-Coolant cooler stud. One-time use, part of 7P159 kit. 2 - Oil-to-Coolant cooler. Part of 7P159 kit. And operating modes description: Power Transfer Unit (PTU) Operation The PTU has four (4) distinct modes of operation: Connected, Connecting, Disconnected, and Disconnecting. Each mode is commanded by the AWD module. The PTU contains a reversible DC motor and two hall effect position sensors. The motor moves the shift fork which connects or disconnects the dog clutch collar. PTU Position sensor A monitors the position of the actuator cam. PTU Position sensor B monitors the position of the shift fork. Some PTU models are equipped with an oil temperature sensor Connected Mode Connected Mode is the default mode for the PTU. The AWD module will command Connected mode at the beginning of each key cycle. In connected mode, the fork and dog clutch collar are positioned towards the RH side of the PTU. The dog clutch is engaged. The driveshaft is rotating at an overdrive ratio compared to the front axle shafts. Torque is available at the RDU. Connecting Mode To connect the PTU, the two halves of the Dog clutch must be within 40 RPM of each other. The AWD module calculates the speed differential based on transmission OSS, RDU Driveshaft Speed, and PTU gear ratio. The actuator motor will energize and rotate the gear reduction drive and the actuator cam against the actuator fork. When the dog clutch teeth line up, the cam pushes the actuator fork into position and the clutch engages. It can take approximately 100 - 150ms for the dog clutch to engage after the command is sent. Disconnected Mode The AWD module will command disconnected mode based on vehicle conditions. The purpose of the disconnected mode is to reduce drag losses from spinning the driveshaft when conditions indicate AWD will probably not be needed in the near future. In disconnected mode, the fork and dog clutch collar are positioned towards the LH or transmission side of the PTU. The dog clutch is disengaged. Disconnecting Mode To disengage the PTU, no torque can be routed through the dog clutch. That is, the RDU must be completely disengaged. Depending on vehicle conditions, the AWD module may keep the PTU engaged for the remainder of the key cycle. The actuator motor will energize and rotate the gear reduction drive and pull the actuator cam away from the actuator fork. When the dog clutch collar has moved far enough to the LH or transmission side, the dog clutch teeth disengage. Wondering if i have one on mine. Have fun guys! Quote Link to comment Share on other sites More sharing options...
Replicator Posted October 6 Report Share Posted October 6 Went to change my PTU fluid yesterday and noticed the PTU Cooler isn't connected to anything. I thought the ST starting in 2019 had the PTU Cooler? What would be needed to connect this? 2019 ST manufactured in July 2019 in the US and sold in US. 1 Quote Link to comment Share on other sites More sharing options...
IWRBB Posted Wednesday at 12:44 AM Report Share Posted Wednesday at 12:44 AM On 5/15/2024 at 2:29 AM, WilkiST said: For the moment this what i found regarding PTUs for confused owners, like me. ...... Have fun guys! Where are you finding this info? It seems impossible to work on anything new-ish without this kind of detail. Quote Link to comment Share on other sites More sharing options...
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