700R4 running without ECM???
07-08-2010, 08:52 PM
#1
Junior Member
Thread Starter
Join Date: Nov 2009
Location: Austin, Texas
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1983 T/A
Engine: 454 BBC
Transmission: Built 700R4
Axle/Gears: Weak 10 Bolt/3.23
700R4 running without ECM???
Hello, I am wrapping up the final loose ends on my BBC swap project and have a question. I am running a full carbed 454 in my 83 T/A. I pulled the ECM and rewired everything else throught the C100. I have a rebuilt (BUILT) 700R4 behind the BBC. I believe that there is a small 4prong weatherpack connector that runs to the tranny but I believe that this runs through the ECM. Not having an ECM, this presents a problem. Does that control the lockup? Can I drive the thing without this plugged in or will it hurt? I know that I can buy a lockup kit but I was just wondering if I can still drive? I was reading a post earlier where folks were running their lockup off of a toggle. If this works, How?
07-08-2010, 11:45 PM
#2
Senior Member
Join Date: Sep 2007
Location: Leander,TX
Posts: 568
Likes: 0
Received 1 Like
on
1 Post
Car: 84 Z28 / 88 Trans Am / 87 base
Engine: L69 H.O. / 468 BBC / 2.8 v6
Transmission: 89 700R4 / TH375B / 700R4
Axle/Gears: 3.73 open / 3.23 posi / 3.42 open
Re: 700R4 running without ECM???
DO NOT - DO NOT drive without some form of lockup controll you WILL burn up your 3-4 clutchpack.There are several threads on how to wire up a system here. Contact Pro Built Automatics for a kit that will help, its cheap and it always works.
Last edited by duckmanquacker; 07-08-2010 at 11:52 PM.
07-09-2010, 07:19 AM
#3
Member
iTrader: (12)
Join Date: Dec 2005
Location: NY
Posts: 383
Likes: 0
Received 3 Likes
on
2 Posts
Car: 88IROC, 91Z28 + parts cars
Engine: 355, 408
Transmission: T56
Axle/Gears: 3.42 LS1, 9" w/ 4.56 and spool
Re: 700R4 running without ECM???
Yes all that plug controls is the lock up function on the converter. You can search the site to find a wiring diagram and make your own lock up switch with a toggle and some simple wiring or buy a kit like suggested above. Either way it is a good idea to have the proper lockup function. Not sure if driving around unlocked would do damage like duckman says. I know you don't want the trans shifting gears with the converter locked cause it will do damage to the input shaft.
07-09-2010, 08:28 AM
#4
Supreme Member
Re: 700R4 running without ECM???
You can drive without the converter locking up. Its just going to create more heat doing so.
Thread
Thread Starter
Forum
Replies
Last Post
