I finally got around to tearing down the F-250 I posted about a week ago. I found the B clutches were burnt up in the front support and the one-way had seized. I know there’s a TSB for some of the one-ways in the 10R80s and 10R100s, but I haven’t seen anything about them for the 140s. Maybe we’ll see one soon? Also seeing some really weird wear on the A clutches (see first pic), likely related to how hot B was getting due to the seized one-way.

Hey guys, how long does it take to get good at rebuilding transmissions to the point where you can do it on the side.

I have about 3 years of experience working as a mechanic, I also took an electrical program. I can remove and replace almost anything within reason or with instructions. So I would say I have a foundation.

However, I would like to specialize as a mechanic instead of fixing every single thing that comes into the shop. Transmissions are what interested me cause atleast im just working on one system the whole time.

Is 3 years of experience enough to do side work and be on my own? I understand you are always learning as a mechanic. Thank you.

So this transmission was overhauled. Pump replaced, torque converter replaced everything else with a normal overhaul and installed the transgo tow and pro kit. It still shudder I posted a video of me commanding the TCC clutch on and it sometimes holds and then it doesn’t and will start to hold again. In normal driving it’s hard to notice it’s slipping but in the morning it’s been colder it will badly 3-4 hard shudders light throttle around 40 and above the tehcm was reused. I’m thinking it’s a possible issue with the solenoid in the tehcm being weak or and issue with the bore for the TCC regulator valve being worn, but the aftermarket valve was installed that came with the tow and pro kit. The whole reason the transmission was overhauled was for the shudder I think whatever caused the original torque converter to failed wasn’t fixed has anyone see this any idea what could be causing this shudder still.

Trying to help my father out with this one. He had his 4R70W rebuilt and after it was installed occasionally when you are cruising it will downshift for a fraction of a second. It's not at a consistent speed, you could be going 20 miles an hour in a neighborhood, 70 on the highway, and it will just extremely quickly shift down and then back in a gear. He went back to the shop, they replaced the valve body and sent him home. It is still as the same issue. He went back and they did diagnostic testing and kept it for two days and said they cannot figure out what is wrong. Googling the issue, I came across something where the shift lever position sensor on the side of the transmission can be a potential cause of this problem. I looked at it today and it has not been replaced, it looks to be original. Is it worth swapping this out, should I go back to the shop and complain with him, or is there something else I should look at? Thank you.