Tranny Line Leak - 07 GMC Sierra Classic Allison

[gimpyhauler]

OMG! What a can of worms.

Tranny to lower radiator hydraulic line dripping. Okay.

Pull tranny drain plug. Replace Tranny filter.

Pull line off, have rebuilt. Done. With good joints.

Replace plugs with new clips and reassemble.

Add Amsoil tranny fluid. Run to warm, no leaks. Call it quits for the night.

Next morning, nothing seems right. See slight smoke. Stop. No clue. Look under and no smoke. Maybe I'm not awake.

Stick the reader on and I had something like 13 codes. Cleared it and started over.

These are what came up.

PO
102
101
299
700
751
761

Anyone want to guess what I did?

I'll check the AirMas tomorrow. Something I missed.

The other stuff?

Did I forget to plug something in?

I drained the pan, change trans filter spin on, line repair, Refill with AmsOil synth.

No extra leftover parts.

Solar flair?

[rapidoxidationman]

If you had the lines open for a while, my bet is you've got air in places the transmission doesn't like. I'd be inclined to drive it for a day, clear the codes, then warm things up again and check the transmission fluid level. Fair odds the codes will be gone. IF something else didn't get knackered during your fix.

[DmaxMaverick]

The 07xx codes are explained by all the air you let into the system. These will go away with some driving. If you can't clear them (many readers can't clear tranny codes), they will clear after a few starts w/o the issue present.

The MAF codes are unrelated. Check the electrical connection at the air intake pipe. Did you service the air filter, or something else in the area? If not, check air filter restriction. A plugged filter (or partially plugged, like a rodent nest) can alter the airflow in the pipe, which can skew the MAF input. A fouled EGR or obstructed exhaust can do the same (check for a banana in the tailpipe).

[gimpyhauler]

Rapid,

Thank you.

Dmax,

You never fail. Thank you. All is not lost, just a day.

I'll report back.

[gimpyhauler]

Okay, had a chance today to start er up again.

I had failed to tighten one clamp on the intake box. Done.

Cleared the codes.

Now it doesn't code. Won't have a minute to drive it around until tomorrow but it appears, as usual, you guys hit it on the head.

It was open for a while while draining. So I think a little extra air was probably the complaint.

I'll report again as soon as I drive it a bit.

What would I do (open my wallet wide) if it wasn't for this site and the great help I get here.

Thank you.

[rapidoxidationman]

Glad you got things sorted!