4l80e problem

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Chevrolet - 30 Jan 2007 20:23 GMT

I was told my 3500 cube van 1998 350 vortec with 4l80E tranny was fuc***
as it wouldn't engage 3rd or 4th gear. SO I buy a used one that I know
worked before I installed it and guess what.. Same thing. SO either the
tranny shop screwed me with a false conclusion or I screwed this installing
it WHICH I doubt. Is there a computer or relearn procedure or is it all
controlled by computer ?.. Is there any test's I can do to figure what is
wrong ?.. Thanx for any help or advice

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SnoMan - 30 Jan 2007 20:42 GMT

> I was told my 3500 cube van 1998 350 vortec with 4l80E tranny was fuc***
>as it wouldn't engage 3rd or 4th gear. SO I buy a used one that I know
[quoted text clipped - 3 lines]
>controlled by computer ?.. Is there any test's I can do to figure what is
>wrong ?.. Thanx for any help or advice

The E on the 4L80E stands for electronic controlled. Do you bother to
check for erro code before you pulled tranny. I scanned a truck the
otherday that was acting weird with tranny and it returned several
error codes related to tranny control soleniods or their circuits. I
also had a freind that had a 4L80 that was not shifting right and it
turned out to be a bad engine coolant temp sensor. When he replaced it
all was well.
-----------------
TheSnoMan.com

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Chevrolet - 30 Jan 2007 21:13 GMT

no codes came up when scanned.. they said it was a bad transmission. The new
one is doing the same thing. I'll try and rescan it but no codes are coming
up/

>> I was told my 3500 cube van 1998 350 vortec with 4l80E tranny was fuc***
>>as it wouldn't engage 3rd or 4th gear. SO I buy a used one that I know
[quoted text clipped - 14 lines]
> -----------------
> TheSnoMan.com

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David Hill - 31 Jan 2007 00:07 GMT

I had the same problem. I had a false code (54?) that was setting due to a
bad ignition switch. It would stay stuck in 2nd gear. May check or replace
the ignition switch.

> I was told my 3500 cube van 1998 350 vortec with 4l80E tranny was fuc***
> as it wouldn't engage 3rd or 4th gear. SO I buy a used one that I know
[quoted text clipped - 3 lines]
> is it all controlled by computer ?.. Is there any test's I can do to
> figure what is wrong ?.. Thanx for any help or advice

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Chevrolet - 31 Jan 2007 02:50 GMT

I have NO CODES ! I scanned it, drove it , the n rescanned, THEN undid
batery cable drove it and still no codes. I'll try the ignition switch..

>I had the same problem. I had a false code (54?) that was setting due to a
>bad ignition switch. It would stay stuck in 2nd gear. May check or
[quoted text clipped - 7 lines]
>> is it all controlled by computer ?.. Is there any test's I can do to
>> figure what is wrong ?.. Thanx for any help or advice

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