Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

PRND Inputs?

Thread Tools
 
Search this Thread
 
Old Apr 15, 2010 | 06:28 PM
  #1  
jeepnut24's Avatar
Thread Starter
On The Tree
 
Joined: Apr 2010
Posts: 174
Likes: 0
Default PRND Inputs?

What are these PCM inputs used for? I have been doing research and came across them and Im wondering what they are used for.

Are they used to show which gear you are in? If not, is there another way to setup some LEDs or similar to show what gear Im in?
Reply
Old Apr 15, 2010 | 09:11 PM
  #2  
poconojoe's Avatar
Banned
iTrader: (43)
 
Joined: Aug 2008
Posts: 1,066
Likes: 3
From: Northeast PA
Default

Are talking about the ones coming from the selector switch on the side of the tranny or the ones from the pressure plate in the tranny itself?
Reply
Old Apr 15, 2010 | 09:31 PM
  #3  
jeepnut24's Avatar
Thread Starter
On The Tree
 
Joined: Apr 2010
Posts: 174
Likes: 0
Default

Originally Posted by poconojoe
Are talking about the ones coming from the selector switch on the side of the tranny or the ones from the pressure plate in the tranny itself?
I was looking at the PCM pin diagrams so Im not sure where they end up.
Reply
Old Apr 15, 2010 | 09:34 PM
  #4  
aknovaman's Avatar
TECH Addict
15 Year Member
Liked
iTrader: (7)
 
Joined: Apr 2007
Posts: 2,012
Likes: 111
From: Hog Back, KS
Default

It's primarily used to increase idle speeds (in and out of gear) and a couple other minor functions. Unless you have emissions testing you can have them deleted in the PCM file and the engine will run just like a manual trans engine.
Reply
Old Apr 15, 2010 | 09:49 PM
  #5  
jeepnut24's Avatar
Thread Starter
On The Tree
 
Joined: Apr 2010
Posts: 174
Likes: 0
Default

Originally Posted by aknovaman
It's primarily used to increase idle speeds (in and out of gear) and a couple other minor functions. Unless you have emissions testing you can have them deleted in the PCM file and the engine will run just like a manual trans engine.
How do they factor in for emissions? My swap has to go through a Referee so it will need the Motors emissions controls in place.
Reply
Old Apr 16, 2010 | 08:59 AM
  #6  
aknovaman's Avatar
TECH Addict
15 Year Member
Liked
iTrader: (7)
 
Joined: Apr 2007
Posts: 2,012
Likes: 111
From: Hog Back, KS
Default

Not sure. You can delete it and try to pass the test. It's in the factory service manual but no time to check it out.
Reply
Old May 3, 2010 | 09:11 AM
  #7  
jeepnut24's Avatar
Thread Starter
On The Tree
 
Joined: Apr 2010
Posts: 174
Likes: 0
Default

Any other advice or info on this? Can this be used to run a gear indicator light? I got my transmission and the switch is still in tact so I can easily hook it up and run it.
Reply




All times are GMT -5. The time now is 05:58 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
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.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
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.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
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...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE