Superdex07

My poor suburban transmission recently had a unfortunate meltdown so i took it to Aamco for the bad news of $3400. They said they pulled the codes and said the ECM killed it. I purchased a rebuilt 4l60e w/ converter and ECM, had a flawless install and it seems to be in limp mode. I've checked the fuses, electrical connections,fluid ect. And there is 12v at the plug. Any ideas please?

mrvedit

For $3400 they should take care of it, AND cook and serve you dinner for a month.
Not to be difficult, but this is not enough info to go on, and I don't understand why you are asking. Do you not expect Aamco to fix it? If you doubt their work, take it to another local shop.
Sorry, but I kinda doubt your "ECM killed it"; might be a ploy to run up the bill.

maddoglou454

Hey my man! Looks to me they over charged you by a lot. If it was me, i could walk you through fixing it, but since you paid an arm and a leg; plus a dinner. Take it back to Aamco and tell them to fix it. That's crazy!

Superdex07

I apologize for not being more specific! I let Aamco diagnose the problem. After they gave me the verbal $3400 beating, I took it home and replaced it myself with a rebuilt unit and ECM.

68 TT

That makes more sense now. What year is the Suburban?

Does the engine run properly with the replacement PCM and just the trans is not working right?

Can you pull any codes so we know what you are dealing with?

Superdex07

The suburban is an 05' 5.3 4x4, I don't have codes, I've ordered a reader. I'm
thinking maybe solenoids? The engine runs great.

Superdex07

The suburban is an 05' 5.3 4x4, I don't have codes, I've ordered a reader. I'm
thinking maybe solenoids? The engine runs great.

mrvedit

OK. Now we understand; glad you didn't spend the crazy $3400. Generally an open/shorted solenoid will give you a code; with any solenoid codes the PCM will put the trans into limp mode.

Superdex07

Sounds good, I will pull the codes when my reader comes in and let you know something, thanks everybody!

Orangemagic

iTrader: (2)

Limp mode as in starts in 3rd gear? If so you probably have a bad shift solenoid or forgot to plug one in.

Superdex07

I pulled the pan and replaced both shift solonids, checked connections and still in limp mode? My scanner is not pulling codes? Help!

mrvedit

Do you still have your old PCM to try?
I have not heard of the PCM going to limp mode without showing a code.
Are you sure your new PCM has the automatic transmission OS installed?
(If it we setup for manual trans you would have limp mode and no codes.)

I'm not absolutely sure of my comments; perhaps someone else will have corrections or suggestions.

Superdex07

I did try both ECM's and still no codes, the replacement ECM came out of a Tahoe and has the same numbers on it. I think all of the suburbans and tahoes were automatics.

mrvedit

I wonder if there are any other conditions, e.g. faulty trans temp reading, that might put the PCM into limp mode.
Hopefully someone more experienced has ideas.

BTW - If there is no power to the trans, both solenoids are off, and the trans is therefore in 3rd gear.

guatepa

Did you ever get resolution of this issue? I also have a '05 Suburban with the same symptoms. Very frustrating and not sure what to do next. I would very much appreciate any more info if you have any. Thanks

FRANK KATZ

HEY THERE, I JUST WANTED TO CHIME IN I'VE OWNED & OPERATED A TRANSMISSION SINCE 1980 & WORKED ON THEM FOR
5 YEARS BEFORE THAT AT A CHEVY DEALER. I CAN TELL YOU THAT EVERYBODY INCLUDING SHOP OWNERS WENT THROUGH STICKER
SHOCK WITH THESE PRICES. WHEN I FIRST OPENED THE AVERAGE $s FOR A OVERHAUL WAS ABOUT 375 WITH A YEAR
WARRANTY. THE FIRST ONE THAT I HAD TO CHARGE OVER A $1000 FOR I FELT SO SORRY FOR THE PEOPLE THAT I DID
THE JOB FOR A LOSS. I SAID ALL THAT TO SAY THIS I'M NO FAN OF AMMCO BUT FOR ALL THESE PEOPLE TO
TELL YOU THAT AMMCO WAS CHARGING YOU TO MUCH IS IRRESPONSIBLE WITHOUT KNOWING THE CONDITION OF THE
TRANNY.! THESE THINGS CAN COST ALOT OF MONEY & THE OVERHEAD OF A SHOP IN A HIGH TRAFFIC LOCATION
IS REALLY HIGH & PAYING A GOOD BUILDER UP TO $1500 PLUS A WEEK & 3 OR FOUR MORE EMPLOYEES, WELL HIS
OVERHEAD COULD POSSIBLE BE OVER $7500 A WEEK. SO DON'T FEEL LIKE YOU WERE BEING TAKEN ADVANTAGE
OF. $3400 DOESN'T SOUND LIKE ALOT FROM AMMCO. GO TO SOMEBODY THAT DOES TRANNY WORK ON THE SIDE IN THERE BACK YARD IF YOU WANT A CHEAP JOB YOU HAVE TO REMEMBER YOU GET WHAT YOU PAY FOR.
IN LIFE. GOOD LUCK

MaroonMonsterLS1

WHY ARE YOU YELLING?
Also, why did you use your first post as a member...to reply to a thread that is 5 years old...with no activity in the last 5 years?

mrvedit

Frank Katz:
Welcome to the forum.
But as MaroonMonster points out, please follow forum etiquette - do not write in all CAPS, and please do not post on threads that have had no activity in a year, much less 5 years! The reason for this is that everyone who posted on that ancient thread got a notice there was a new post. This makes long time members grit their teeth and will not make you any friends. These guidelines are true for all online forums.
With that, we certainly welcome comments from a transmission businesses owner/mechanic.

I have now closed this thread. If someone wants to comments on transmission repair prices, hey just start a new thread.