PTU Fluid Change...Kind Of...

shaker281

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I totally understand that some folks don't want the hassle. But, on the scale of things that have a great payback ratio by doing your own labor, this is serious **** for the buck. 1 bottle of Royal Purple costs $20. That covers at least 3-4 swaps. The pump and extra hose cost $20. I figure that every time I do it, I am saving over $200. I tend to plan it when I already have the car in the air for some reason. Brakes, belt and tensioner, etc. Thus, making it a gravy job, providing that you like your gravy smelling like something that comes out of a very sick cat.
 

Lostneye

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I totally understand that some folks don't want the hassle. But, on the scale of things that have a great payback ratio by doing your own labor, this is serious **** for the buck. 1 bottle of Royal Purple costs $20. That covers at least 3-4 swaps. The pump and extra hose cost $20. I figure that every time I do it, I am saving over $200. I tend to plan it when I already have the car in the air for some reason. Brakes, belt and tensioner, etc. Thus, making it a gravy job, providing that you like your gravy smelling like something that comes out of a very sick cat.
Agreed, but for some of us it's just not possible. I know people who are just not mechanically included and shouldn't change their own oil. I live in a condo with no garage and rules against working on cars. Before my father moved to another state I used to do a lot of work myself, oil changes, brakes, dropped the tank to do a fuel pump. I just don't have anyplace I can consistently work on the car.
 

Billy VK

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As a footnote to having mine done.... This was the first chance I had seen the bottom of my car on a lift. The car has 50k miles on it. The PTU in the car has YELLOW WRITING ON IT!! So apparently the unit had already been blown up once and replaced. I have my fingers crossed that I don't see that happen in the time I own it.
 

tron23

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As a footnote to having mine done.... This was the first chance I had seen the bottom of my car on a lift. The car has 50k miles on it. The PTU in the car has YELLOW WRITING ON IT!! So apparently the unit had already been blown up once and replaced. I have my fingers crossed that I don't see that happen in the time I own it.

That’s pretty crazy to think about! I know on my non PP 11, mine went out at 140,000 and was replaced. And honestly, knowing a woman owned mine before me...i honestly doubt it was ever changed before me (got it at 130,000) . It’s just crazy that some could go that early.


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glockcoma

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As a footnote to having mine done.... This was the first chance I had seen the bottom of my car on a lift. The car has 50k miles on it. The PTU in the car has YELLOW WRITING ON IT!! So apparently the unit had already been blown up once and replaced. I have my fingers crossed that I don't see that happen in the time I own it.

My new ptu directly from ford had yellow marker on it. I wouldn’t worry about it.
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Billy VK

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Hmm... Well I don't know if this is a good or a bad thing.... Original and 50k miles or replaced and hopefully better off.... I guess we'll see.
 

MelectroK

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Anyone doing this change via the vent hose is very very slow? Just make sure I'm doing it right and its annoyingly slow. Have a 2oz funnel on the top of the hose clamped in place. Fill it and wait a hour put more in. Its like I should be letting air in somehow. Doing right now if anyone has a tip. Also got about 10-11oz out drain plug. Put that much in or the full 16.

Thanks
 

RoketRdr

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Anyone doing this change via the vent hose is very very slow? Just make sure I'm doing it right and its annoyingly slow. Have a 2oz funnel on the top of the hose clamped in place. Fill it and wait a hour put more in. Its like I should be letting air in somehow. Doing right now if anyone has a tip. Also got about 10-11oz out drain plug. Put that much in or the full 16.

Thanks

Once your start filling through the vent tube the case is now sealed. You have to wait for it to displace the air out of the axle seal. Pull the fill port and it will go quickly. Fill it until it runs out of the fill port. Only getting 10 oz out most likely means the other 8 oz has turned into sludge. If you don't want to pull the PTU to clean it out you can add some Marvel Mystery Oil or trans fluid to help break up the sludge. Run it for about a week and then drain/fill again.
 

MelectroK

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Once your start filling through the vent tube the case is now sealed. You have to wait for it to displace the air out of the axle seal. Pull the fill port and it will go quickly. Fill it until it runs out of the fill port. Only getting 10 oz out most likely means the other 8 oz has turned into sludge. If you don't want to pull the PTU to clean it out you can add some Marvel Mystery Oil or trans fluid to help break up the sludge. Run it for about a week and then drain/fill again.

I dont have a fill plug to pull out. I only have the vent and the drain. The only put 8 back in though, how much trans fluid 2oz?
 

RoketRdr

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I dont have a fill plug to pull out. I only have the vent and the drain. The only put 8 back in though, how much trans fluid 2oz?

The fill port is where the temp sensor is. You have to remove the heat shield, unplug the sensor and then unscrew it. Yes I would add about 2-3 oz of trans fluid.
 

SHOdded

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If you have a 2010-2012 SHO, the drain and fill ports are the same. 2013+ perf pkg ptus have separate drain and fill ports.

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Michigan-SHO

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Jeezuz...these PTU threads are like playing wack-a-mole...lol....they just pop up everywhere...

I was kinda joking about it before, but now that idea of a dedicated PTU sub-forum doesn't sound so bad...

I think if the moderators would be willing to “sticky” a definitive PTU thread at the top of the maintenance and troubleshooting page it would help a lot.
 
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