I need help. I'm having trouble with my transmission.

When you say slipping when turning, are you saying the transmission is slipping or the rear diff?

 

I believe its the rear differential.

 

I'm still confused why you think it's slipping? Are you wrapping turns at 50? It shouldn't slip or break traction under normal driving, so how fast are you taking these turns to make it "slip"?

 

Do you have an e locker?

 

No e locker normal speed I'm going change the differential fluid right now again i put additive in their.

 

Bro you drove for an hour with no trans fluid and 4.5 quarts overfilled on engine oil? I would expect serious damage to the trans and engine

 

Yeah but my mechanic check ot out said everything good nothing happen also he filled up the transmission fluid as well. I have engine light on but i went to autozone and nothing comes up on their side

 

You need to find a different mechanic if he's not finding anything wrong.

 

go to the dealer then, if your guy looked at it and said it's fine but it's still doing it then something's wrong. You can't just keep changing the fluid in the rear end endlessly, I mean I guess you could, I wouldn't but you could.

 

He used to work with toyota. I'm going change the differential fluid right now. 75/90 oil and see if that helps

 

Yeah I'm going go to dealer they want 100 to do a diagnostic test

 

Then stop throwing money at it until they diagnose it.

 

How does he know it's all good? Did he do a compression/leak down test? Obviously everything is not ok if your saying the rear end is slipping. It sounds like you probably have a misfire in the engine from the excessive oil that was in it. The dealer could check the code and see if it's really something to be concerned about, I don't know if autozone tools are up to the task.

 

Yeah I'm going take it to toyota soon.

 

This is something that cannot be diagnosed on a forum.

Overfilling oil or driving on low transmission fluid is not going to affect the rearend. Unless of course, the transmission started slipping and you revved it until it caught and snapped/damaged something in the rearend.

Your story thus far is the equivalent of airing up a tire and the windshield wipers stopped working so you are going to change the wiper blades and rotate the tires to fix it.

There has to be more to the story, either it was having the symptoms before doing oil/transmission fluids or you did something that damaged the rearend.

Otherwise your problem is in the transmission

 

You said it was slipping, Your mechanic filled it back to normal. Still slipping....

What do you think it is?

 

This thread makes my head hurt.

I still don't understand what your definition of slipping is?

OP, How about defining what you mean by slipping.

 

I agree with the other people who have already said that this problem can't be fixed by people giving advice over the internet. You need a trained mechanic to look at both the engine and the transmission who can run the proper tests on your truck.

 

OP, a man just has to know his limitations. I've changed the oil in my vehicles for quite some time now. I remember the first time I changed my oil I did a little bit of a double take. It'll get better.