4l80e head scratcher.. need help

[Mogman]

ok, but you are wrong, sorry. It is not "in the shifter"

In 4l80es, the NSS is on the driver side of the transmission. It is a large black component with a large electrical connector or several I have owned several, and had similar issues. Limp mode can be enabled with a fault in this switch. Safety thing, go figure.

View attachment 950007

Further @Mogman.........if you know the NSS is not the culprit, then what would solve the OPs issue?

You have owned several on HMMWVs? I have never seen that switch on a HMMWV, but I don't get to play with the latest (ECV/REV) trucks

 

[weaponoffreedom]

but I don't get to play with the latest (ECV/REV) trucks

Well there it is.

Look fella, I am not here to argue or measure dicks with you. OP stated 1999, which would be obd2 era. OP stated module issues. OP stated intermittent......

 

[weaponoffreedom]

I am 100% wrong, yet almost right.

I see you are one of those folks. Again, what knowledge so far has been conveyed to the OP, by you to solve this issue........enough such that you are 100% certain, than my suggestion is shit and clearly wrong?

I also see you are a moderator btw, but the question still stands.