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Transmission filter change gave me error codes. Help please

Ben Girard

By Ben Girard
in Ask A GM Technician

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Ben Girard Enthusiast

Ben Girard

Posted
Posted

Hi,

I was swapping all fluids of my 2008 4wd silverado 5.3.

I did a drop the pan and filter change.

I measured about 5 quarts lost and put back about 5 quarts. I haven't been able to get a clean read of tranny oil level yet.

Tranny is sluggish in 1st gear and won't shift to 4th. It's throwing codes and when I clear them the truck runs fine for 3 seconds. The tranny is building a lot more heat than usual.

It gave me P0700, P0976.

Now P0976 is pending after I cleared everything twice and P0700 is still there.

Do you guys have any idea? Just improper fluid level I'm hoping.I only drove it 10 miles to go back home.

 

Thank you !!

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Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

In addition to fluid level, I'd be checking all the connectors on and around the tranny. Might have bumped one, or maybe one was left unplugged ... or not fully seated.

 

Especially near that bolt way up on top of the tranny - what a place to put something that needs to be removed to drop the pan ... :nonod:

Daryl LBZ Senior Enthusiast

Daryl LBZ

Posted
Posted

We're you careful taking off the pan? Sometimes if you pry on the pan the wrong way you can mess up a solenoid...

tbarn Senior Enthusiast

tbarn

Posted
Posted

dido on the solenoid. p0976 is a shift solenoid issue. pull the pan back off and inspect the wiring. Hopefully you just unplugged a solenoid and didn't break it. It happens.

txab Senior Enthusiast

txab

Posted
Posted

We're you careful taking off the pan? Sometimes if you pry on the pan the wrong way you can mess up a selenoid...

 

 

^^^^ pretty common

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

I thought a P07xx was the only shift solenoid code. I had an P07 something something, when the 1-2 solenoid took a dump in my rolling lemon of a '00 Jimmy. I couldn't tell the difference between the 1-2 & the 2-3 solenoids, so I tested them one at a time - the one that caught fire with 12v applied was the culprit. :lol:

 

 

Learn something new every day with these electronic wonders.

Ben Girard Enthusiast

Ben Girard

Posted
  • Author
Posted

Thank you for all your answers.

Not gonna lie getting that pan off is a major PITA. I removed the tranny shift link and pry on the exhaust as much as I could do.

The pan on the rear left side cleared not in the cleanest way possible ...

I didn't unconnect anything that I know of but I could have damaged somethimg for sure.

I'll check everything tomorrow.

One question, when I clear it everything is fine for 3-4 seconds, shifts into 4th gear. That is a good-ish sign right?

 

Edit : also that solenoid code was pending last time (you can see it on the attached picture in the initial post)

Ben Girard Enthusiast

Ben Girard

Posted
  • Author
Posted

Alright I added a quart level is good.

Trans still slips bad in 1st gear and won't go in 4th. It's building heat fast too.

Still throwing the two codes.

I don't wanna open it and not be able to get parts today.

Do you guys think it's fine to drive home, 80 miles ? It's all highway and I'll take it easy for sure.

Jsdirt Senior Enthusiast

Jsdirt

Posted
Posted

I've seen older transmissions burn up in 5 minutes when things are slipping - all depends on the severity of the slip. Generates some serious heat - not good. Only difference with the modern ones is the electronic controls - the mechanics of it are still basically the same.

 

I think you'll be left on the side of the road within 80 miles, for sure, unless you leave it in 3rd the entire trip with minimal stops - impossible on this side of the nation, but you may be able to do that in MN. You could need new frictions by the end of that trip. Total gamble, and tranny work ain't cheap. Your call there ... but if it were mine, I'd rather pay for an 80 mile tow than a rebuild on these newer ones.

Daryl LBZ Senior Enthusiast

Daryl LBZ

Posted
Posted

I would either fix it where it sets or I would have it hauled back home. I would not drive it.

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