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4l80e change very quick to 4 gear ,first trip after start up
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Post 4l80e change very quick to 4 gear ,first trip after start up 
Need som help/advice
4l80e change very quick to 4 gear ,at the first trip after start up ,but after 1.5 miles it's working normal.
If I stopp and turn off the engine wait 5 min and start up again , 4l80e act the same , but only after 0.5miles its ok.
I have test with diffrent oil temperatur its the same.
It's a 2wd , suspekt it act like it's 4wd in lowgear .
The car it's a 72mod Firebird ,400 Pontiac Engine with 0411/Road Runner ECU .


Br Ponrov

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the reason for 4l80e switching quickly up to 4 gears ,was that the connection C2 16 and 19 on the PCM were grounded.
so that PCM received signal that 4wd low range was enabled and front axle was engaged.

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72 Firebird? have to see some pictures!!

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