windaddiction

Yeah I have blued marine gearing before, and well I can see just by looking at at the wear it was favoring on edge of the gear, so something is worn. I don't want to put anymore energy into unless someone had a specific question!

As requested. Found that is was in better shape than I though. Other than the sludge. The gear teeth all showed sign of scuffing, as well the ring gear had some deeper scuffing on the outside of all the teeth. The bearings looked ok.... with one having a deep groove in the top section of all the rollers. They also had more play then I would expect. The most troubling thing was in the 3rd picture. You can see around the cup that there is a piece of metal that galled up around the outside of where the intermediate shaft sits. I think this would be usable in a pinch ones cleaned up, however the wear pattern on some of the teeth lead me to think that there was a fair amount of movement. As the majority of the wear is localized to the very top or bottom of the gear. Still, a neat little unit. if anyone wants it PM, other wise I'll save it for a project!

I pull a 19 FOOT travel trailer, it is 2700 dry probably 3200 with gear. It tows fine I just take OD off, and stay in the slow lane. It eats the gas! I monitor my tranny temp with my OBD2 adapter and have never gone over 205F yet. Mind you I just replaced my PTU today.... I also use a weight distributing hitch and a really nice electric brake controller. The worst part of towing is the wind resistance not the weight so I imagine towing a boat the same weight as my trailer would be much easier! Also a little off topic, but trailer rated tire (ST = special towing) Are generally rated for 65 MPH max.

So new part in AT4Z-7251-D Can feels much smoother, the vibration and hum is gone! so that is a plus. I have the old PTU in my shop and will take it apart sometime... and take pics. I did turn the old PTU by the rear shaft and it was very hard to turn, and hung up in spots. I don't know if I can blame ford, It does say to check the fluid. I have a feeling if you did that this part would not fail, as long as the oil is there and good. Still super happy with the car overall! Of note, the service guy said it comes with a 2 year unlimited millage warranty! so that's awesome, and he said yes it covers seals as well! So something to consider if you want to do it or have it done at a dealership. He also said all major Ford parts now come with that 2 year warranty.

Cool chart, I change mine every rear just to be safe!

Yeah I am taking it in stride, This is why I buy used I guess LOL. I am still pretty happy with it overall! other than only getting 22L/100km while towing. Also stick the the ford stuff, as I assume the 75-140 stuff is full syn? or use a brand name full synthetic?

I use an app called "torque" with my adnroid phone, and a cheap Bluetooth adapter. It works great for everything except tranny temps. I get them but it bounces quite a bit. I can still get useful info. I tow a 2800# travel trailer, and on a hot day (28C 84 F) driving at 110 km/hr in 5th gear 2200 RPM I was running 94 C (200 F) coolant and anywhere from 90- 95C ( 195-204 F) tranny temp. I am towing fairly flat ground as well. For my own comfort 220 F/ 105 C is my upper limit.

Hi Well, thanks for all the info. I've had my used 2007 edge for about 1.5 years and 50,000km. I am now at 175k and well guess what I am doing. I read awhile ago about PTU issues and checked mine about a month ago while I was doing my rear diff. First off when I went to check it getting anything in to check it or suck and fill it was so hard as a piece of the casting blocked most of the fill hole. I could not get a level so I added 400 ml of fluid cleaned the magnetic plug and drove it for 1500 km. I brought it to a tranny shop to have them try and flush it. They couldn't and there was even more wear metal on the plug than before. I also have a nice humming around 60 and 110 km/h ( most common speeds I drive at). Suffice to say I am having it changed out next week, as I can not afford a failure that could damage the output shaft of the tranny. I love my edge but... this kind of sucks. If the manual at any time had anything about changing this fluid I would have. I am going to ask for the OLD PTU back to do some failure analysis. I also really want a new one as I am doing a camping trip soon (3000km round trip) and towing my travel trailer!