Just rebuilt my 10R80 transmission and having issues

[mfreeoff]

Apex96, Thank you for the input. I wish there was away I could get it up there. I would use your guy in a minute.

My heart really wants to try to fix this thing myself. I don't want to admit defeat just yet. I am thinking about pulling the transmission out this weekend and giving it another shot. I am just worried about a few things. Do I need to flush the torque converter and cooling system out, should I buy a new valve body? I guess I am wondering what you guys would do in my situation. And what should I be looking for, and lastly what tests should I do before pulling the transmission?

 

[apex96]

Apex96, Thank you for the input. I wish there was away I could get it up there. I would use your guy in a minute.

My heart really wants to try to fix this thing myself. I don't want to admit defeat just yet. I am thinking about pulling the transmission out this weekend and giving it another shot. I am just worried about a few things. Do I need to flush the torque converter and cooling system out, should I buy a new valve body? I guess I am wondering what you guys would do in my situation. And what should I be looking for, and lastly what tests should I do before pulling the transmission?

Yes at this point it would be best to flush all lines and trans cooler, if it’s optioned on your expedition. Then go back through the install process and replace anything that shows signs and f deformation and/excessive heat. Might be a good idea to replace the valve body as well as it may have sustained damage or metal shavings if the lines were never properly flushed from the start.

 

[mfreeoff]

Thanks again Apex96, I do greatly appreciate your feed back. Do you know of anything I should test before pulling the transmission?

 

[mfreeoff]

Happy New Years to all. I hope 2025 is good for everyone.

 

[mfreeoff]

I just went out and tried the transmission again, it's a cool night and the trans temp was 67 degrees before starting. Reverse and 2nd works until the transmission temp reaches around 90 degrees. Any pointers besides removing the trans and taking another look? Could it be the valve body acting up?

Also, it might not be related, but I was able to update the shift strategy initially, but now I get "service interrupted" when trying to update the shirt strategy again.

 

[5280tunage]

I really commend you for trying this on your own, you likely have a lot more experience than I have and must have a decent shop to "just run out and take out the tranny", but to me there's a reason even the Ford techs don't wanna touch these things. After my issues, they replaced the valve body, which blew up on me less than 500 miles later, and within 4 hours of taking it back in they requested a full tranny replacement. Everything I'm reading on these and the 10L80's, they aren't happy to be "repaired". It's like they have to come out of the crate whole, or good luck.

Hope you get things figured out though.

 

[SyndicateZ]

Its probably time to start getting quotes from Ford for a replacement tranny as above stated

 

[Fizzy]

I really commend you for trying this on your own, you likely have a lot more experience than I have and must have a decent shop to "just run out and take out the tranny", but to me there's a reason even the Ford techs don't wanna touch these things. After my issues, they replaced the valve body, which blew up on me less than 500 miles later, and within 4 hours of taking it back in they requested a full tranny replacement. Everything I'm reading on these and the 10L80's, they aren't happy to be "repaired". It's like they have to come out of the crate whole, or good luck.

Hope you get things figured out though.

Agreed. Hats off to you @mfreeoff - you're a braver man than me.

 

[mfreeoff]

Thank you all for the nice thoughts. I am no better than anyone, just a little stubborn, and don't have the greatest of a home shop. I am just a man that wants to save money when he can. Sometimes it bites me in the end, but at least I tried.

Update: Today I woke up at 10am and decided to hit it again. I removed the transmission and tore it down and found that one of the Teflon rings around the shaft of the 3rd sun gear was half gone. I truly can't believe that I damaged it while I installed it into the CDF drum, but that is only thing I can think of what happened. I was so careful, so I thought. I just need to finish torqueing down the drive shaft and add transmission fluid tomorrow and we will see what happens.

While I was at ford getting the new Teflon ring and other nuts and bolts, I asked this dealer about a new transmission. This deal also could not guarantee that the new transmission will have the updated CDF and outer shell, but did say that they goes through them very fast so they don't sit on the shelf very long. Matter of fact, he would have to order mine which would take a few days to get. Well the price of the new transmission is right at $6500 after taxes and the return of the core.

I will post tomorrow and let you guys know if my stubbornness paid off, or I am just waiting my time and anyone awesome person that has replied to me. I truly appreciate all the feed back.

 

[mfreeoff]

I found this under the truck after I got the transmission installed. Does anyone know where this might go? I have the feeling that it does not delong to the truck at all, but my little shop is fairly clean.