P0770 Code UPDATED 11/18/16

WTF

So 2001 TRD super charged V6 Auto trans

I have been getting the P0770 Code, Lock up solenoid.
I was able to get the money together and go the kit with a lock up solenoid and two shift solenoid,filter and gasket. 4 qts of toyota ATF, Also got new plugs and wires.




Everthing was clean in the trans or the pan, no metal nothing


Wow my truck runs great!! pulls hard, idles smooth shifts smooth and everything feels like a new truck. 50 miles later the Check engine light comes on Same effin code, WTF do I do now.

I have read a few places that one of the fixes might be the coolant temp sensor on the back of the block?

I am not sure what else to do to fix it . I cant pass stupid Califonia smog with the check engine light, but the truck run perfect.

Any info or help would be great.

 

sounds like the torque converter lock up clutch is your issue. also could be a clogged valve body. the test for the solenoid is to apply compressed air into it and see if it leaks air. the other is to apply battery voltage to the solenoid to see if it opens. new parts can be bad too. then if all is good there check valve body for blockage. it that is fine then new torque converter is needed.

 

Bummer I really dont feel like taking the trans out agian. I just took it out a month ago to replace a cracked flexplate.

 

Jerry you may have already seen this, but it mentions not only what Doublld mentioned but also the coolant sensor. Hope it works out for ya.

http://www.transmissionrepaircostguide.com/topic/tacoma-with-p0770-code/

 

I did read that last night. That sounds totaly stupid but I'm going to try that out next it's the cheapest thing to try next.

 

Driving the truck home lastnight I had the OD off. no check eng light.

As soon as I turned the OD on. The check eng light came on.

Gonna do the coolant temp sen this weekend.

 

Thanks for the update. Let us know the outcome.

 

Question

To take out the valve body. Can the trans be in the tuck?

Or do i need to take the trans out and set it up side down.

I dont want a bunch of shit falling out if I have to remove the valve body. I'm going to try replaceing the speed sensor and coolant temp sensor first, and go from there.

 

you can do it in the truck pieces may fall out tho. you can use trans assembly lube to put them back in there holes to keep them there when you put the valve body back in.

 

This dam truck!

Ive replace the torque converter solenoid - temp sensor-BOTH speed sensor's input and out put. One of them was 350$
The truck drives fine but I'm still getting the damm P0770 code. WTF

 

did you do the diag sequence i sent you?

 

I did the driving thing several times this weekend.

The only thing left to do is take out the valve body but i'm just worried about all of the crap that going to fall out of the trans when I do.

 

did you test the solenoid with air? and check the solenoid with power applied?

 

I didnt check the new one i put in.

I'll check the old one tonight.

 

Did you ever figure out the problem?

 

No
I sold the truck. at 200K miles supercharged I was done messing with it. The trans was going out as well as the Torque converter.
I bought a Tundra More room more power. Best truck I've ever owned ...

 

Okay, well thanks for responding.
Looks nice

 

Did YOU ever figure this out?

 

This is a major clue because this also happened in my case. I barely touched the button and immediately turned it off but shortly afterwards the damn CEL came on.