PTU flushing, I think I found easiest way to do it

[SuperPete]

Its been some time since my last post and I am back.
So revisiting PTU service and its gear oil service, I think I came up with easiest way to change it, made video DYI
So in the few words, remove fill plug and keep filling with fresh gear oil, after about 2 quarts clean oil starts to come out and you good to go.
What you think?

Here is how to video:

 

[luigisho]

Very helpful with a PTU on the bench. Excellent job!!

 

[SuperPete]

Thank you Sir, it is nice to see what is inside to understand.
My original PTU failed at 26K miles, see my original video in the playlist, oil got baked from the heat and PTU eaten the bearing completely, when it was opened, bearing was completely missing, just the shreds of it in the oil

 

[SM105K]

I think it is a good idea. You are doing the same thing when you cycle trans fluid.

 

[joe raptor]

Hey SuperPete what oil you can use to do the flushing ?? Gear oil?, cheap oil ?

 

[SuperPete]

OEM oil, if you going to do this regularly, every 20-25K, OEM oil will do just fine.
Thank you

 

[joe raptor]

Thanks brother !!

 

[lilnado]

essentially what i sorta done i did vacuum pump and ran a fill hose with hand pump to bottom and overfilled till i seen just the clean fluid remaining.

 

[351Blueblood]

I drill and tap drain in mine. I then drain and then spray brake clean in there while rotating axle. Let drain and spray out with shop air. i want that sucker clean.

 

[DouglasB_SHO]

Nicely done! Mine 2011 SHO is up to 103K and I've been wanting to do this, but couldn't find a shop willing to drill and tap it for me. If anyone in Northern Virginia knows a shop that will do it, please let me know.

 

[Cheesehead]

Perfect timing I was going to tackle this project tomorrow as I just turned 40K and it's due. I haven't had the wheel off and even looked at it, but to get the plug out do I just need a 1/2" extension? I do have the pump that was recommended on a previous thread. Will a large pan catch the fluid and does it go straight down? I'm assuming it will be messy but any tips would be helpful. Thanks again necessity is the mother of invention as the kids say

 

[shaker281]

I used several 1/2" extensions, none very long though. It is not exactly a straight shot. One having wobble socket capability helps too. Suctioning out what one can, followed by filling until it runs clear, sounds like a good hybrid approach. A bit less waste and mess, perhaps.

 

[FrankK]

SM105K,

I read most of your post about your SHO and I remember you saying you drilled a drain hole in the bottom of the PTU. What size drill did you use and did you make a jig so the hole was straight? Did you install a 1/8 npt plug to seal the hole?

Hopefully you'll see this and answer back.

Thank you,
Frank

 

[SM105K]

SM105K,

I read most of your post about your SHO and I remember you saying you drilled a drain hole in the bottom of the PTU. What size drill did you use and did you make a jig so the hole was straight? Did you install a 1/8 npt plug to seal the hole?

Hopefully you'll see this and answer back.

Thank you,
Frank

I used the plugs that @Ecoboost_xsport sent to me. Yes they were 1/8 npt thread into the PTU case.

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I used this picture for location. I didn't used a jig, I just drilled it as straight as possible.

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[FrankK]

Thank you SM105K!

With a sharp drill how long did it take you to drill through the case? I'm thinking it shouldn't take too long. How far from the side of the case did you start the hole? Looks like it might be 1.5 to 1 3/4. Also were you able to get the job done without moving anything out of the way. I was under my car today and it looks like you can go straight up.

Frank

 

[351Blueblood]

Here the case is 1/2 inch thick. I used 1/4 npt tap no need to go huge size shown on pic.

 

[FrankK]

Thank you Blueblood! Yes I agree about the smaller size.