0777 / 0700

[TIM Z]

These codes popped up on me 2 days ago,

Kind of felt like limp mode.

i reset twice and shut truck off, all was fine.

Then tonight coming home from town i goosed it and it threw them again.

Should i be concerned? Could be a piece of debris in the solenoid valve(s) ??

 

[Mike L.]

P0777 is usualy the hart attack. P0776 is the death sign. Unless you have a bad output speed sensor or a transfer vase problem, you have an Alli problem. Not a good sign.

 

[TIM Z]

Oh No...

What should i do next ?

Did you mean T case problem mike?

I just had a New Driveshaft yoke installed under warranty, the old one was leaking . Could this be in any way related? .

So should i try to replace the output speed sensor? Or Maybe the solenoid valve(s) ?

Thanks very much, Just hoping its not too big a problem.

 

[Mike L.]

Take it back the MA and let eric check it.

 

[SteveFord]

How many miles do you have on it? Can't be very many.

 

[TIM Z]

40,000 miles, had Tranny built at 15,500.

Im just hoping it doesnt involve a full rebuild or anything. im not working right now

If it needs sensors or solenoids replaced i dont think it should be too big a deal?

6 hour Haul To Erics!

Mike L. , Thankyou for your input!!:hug:

 

[Huntinducks82]

Have you changed your tunin recently. I was gettin the same code and it was in the tunin.

 

[TIM Z]

Yes and no, i went from my hot tune to my Tow tune and its fine on the tow tune trans wise.

Im getting it looked By Eric in 2 weeks, will keep updates.

Thanks to Mike L for the help this morning. Cant say how much i appreciate it.

Great people here for sure!!

 

[SmokeShow]

Oh shoot... friend asked me to look up this code (P0777). Things aren't looking up for him after reading this thread. An suggestions on trouble shooting?

Here's a run down FYI. 06 LBZ, built trans, had pulling truck duties at first but after a season and a charger later, it was retired to stock tuning for 30K miles. Now it just lost another turbo (strange IMO on a stock work truck) so it was upgraded to a bigger VVT turbo and consequently, you can't be having that extra air available and not put the screws to it in the tuning so it's been tuned again also. I'm talking less than 1000 miles since putting tune back in and swapping turbos. More like 500 probably. It threw this code pulling in garage.

That's all the info I've got til he's back home from a skiing trip. What he wants to know is "what's wrong and how to fix it?" and "does trans need to come out or just pull pan?"


Any help would be GREATLY appreciated!

 

[TIM Z]

I had burnt C3's .

Replaced them and all is good.

Sorry not what you want to hear and not what i wnted to hear either at the time!