When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Anyone have a diagram/picture of what each of the plugs that are external on the 4l80e transmission? I color coded the plugs red and the wiring harness pins blue to make it easier to reference. This transmission is mated up to a LQ9 motor/wiring harness. I know the big round is is the main plug and I believe one of them is a speed sensor (#4 wire and #5 plug), can anyone tell me what the other plugs are used?
Pic quality is a little off, but from what I can see, your #6 wire goes into youre #3 plug. #2 and #3 are your PRNDL and neutral safety. 1 is a speed sensor. Looks like you are missing 2 connectors.
#1 is input speed sensor(not used on some aftermarket controllers), #5 is output speed sensor, #4 is the main case plug, contains all the wiring, the rest are as said, just an external information switch.
Okay thank you. I am swapping this in my old nova. Do I need any others besides the main plug and either input or output speed sensor? Guessing I need the output? Can I just cap the other plugs and not use them??
They make a dummy plug you can use on the input, or just leave the orig plug there. You can remove the switch from the shifter.
What are you going to use to control the trans
Pic quality is a little off, but from what I can see, your #6 wire goes into youre #3 plug. #2 and #3 are your PRNDL and neutral safety. 1 is a speed sensor. Looks like you are missing 2 connectors.
Zane, I have tried to plug #6 into #3 but it's not the same plug type. Keep in mind the lq9 motor has a 4l60e and not a 80 from the factory. That might be why I'm missing some plugs
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
4l80e External Plugs 
