Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

LT1 swap Auto/T56

Thread Tools
 
Search this Thread
 
Old Aug 7, 2004 | 08:45 PM
  #1  
lancerracer's Avatar
Thread Starter
Member
 
Joined: Aug 2001
Posts: 200
Likes: 0
From: Somerset, NJ
Car: 1988 T/A WS6
Engine: none right now
Transmission: 700R4
LT1 swap Auto/T56

Is it possible to swap a LT1 that was originally in a a manual car to a 700R4? How much more work would it involve? Thanks
Reply
Old Aug 7, 2004 | 11:00 PM
  #2  
tamatt27's Avatar
Supreme Member
 
Joined: Jun 2002
Posts: 1,571
Likes: 0
From: ATX
Car: Kitt
Engine: Classified
Transmission: T56
Axle/Gears: Moser/4:11
I don't really understand. Is your thirdgen an auto (700R4), and you want to swap just the LT1 in, and mate it with your auto? If so, yes it's possible, you just have to get a flexplate that goes to a 700R4, and possibly different starter.
There's nothing different about the LT1 engine itself, just the flexplate (auto) or flywheel (manual).
Reply
Old Aug 7, 2004 | 11:01 PM
  #3  
lancerracer's Avatar
Thread Starter
Member
 
Joined: Aug 2001
Posts: 200
Likes: 0
From: Somerset, NJ
Car: 1988 T/A WS6
Engine: none right now
Transmission: 700R4
yes that is how it is, I am sorry for being vague. Besides that flex plate, I would also need a computer from an automatic car right?
Reply
Old Aug 8, 2004 | 10:24 AM
  #4  
94zsson's Avatar
Junior Member
 
Joined: Aug 2004
Posts: 20
Likes: 0
From: charleston SC
Car: 87 Z28
Engine: LT1 Hotcam motor
Transmission: T56
no you dont need an auto computer

when you stick a 700r4 behind a LT1 it is just like having a T56 behind it

you dont need anything special
Reply
Old Aug 8, 2004 | 11:12 AM
  #5  
tamatt27's Avatar
Supreme Member
 
Joined: Jun 2002
Posts: 1,571
Likes: 0
From: ATX
Car: Kitt
Engine: Classified
Transmission: T56
Axle/Gears: Moser/4:11
Just get an LT1 throttle body from a '92 or '93. Those are the only years a 700R4 was behind an LT1.
Reply
Old Aug 8, 2004 | 01:21 PM
  #6  
lancerracer's Avatar
Thread Starter
Member
 
Joined: Aug 2001
Posts: 200
Likes: 0
From: Somerset, NJ
Car: 1988 T/A WS6
Engine: none right now
Transmission: 700R4
so all I need it a throttle body from a 93? Is there one available aftermarket or should I just hit the yard? Thanks
Reply
Old Aug 8, 2004 | 05:57 PM
  #7  
Z28ricer's Avatar
Supreme Member
iTrader: (2)
 
Joined: Jan 2001
Posts: 4,149
Likes: 3
From: Tampa, FL, USA
Car: 93 240SX
Engine: LQ9
Transmission: T56
Axle/Gears: 3.54 R200 IRS
Yeah it will bolt right up, you need an auto flexplate of course, you'll also need the throttle body, throttle cable bracket, and TV cable from a 93 f body.

After that you need a way to compensate for the different vss pulse to the pcm.
Reply
Old Aug 8, 2004 | 08:00 PM
  #8  
lancerracer's Avatar
Thread Starter
Member
 
Joined: Aug 2001
Posts: 200
Likes: 0
From: Somerset, NJ
Car: 1988 T/A WS6
Engine: none right now
Transmission: 700R4
Originally posted by Z28*****
After that you need a way to compensate for the different vss pulse to the pcm.
And how would I go about that?
Reply
Old Aug 8, 2004 | 09:00 PM
  #9  
tamatt27's Avatar
Supreme Member
 
Joined: Jun 2002
Posts: 1,571
Likes: 0
From: ATX
Car: Kitt
Engine: Classified
Transmission: T56
Axle/Gears: Moser/4:11
Couldn't you just get the computer from a '92 or '93 auto LT1? Would that work, since the computer would recognize the VSS signal from the 700R4, since it originally came with a 700R4?
Reply
Old Aug 8, 2004 | 10:26 PM
  #10  
lancerracer's Avatar
Thread Starter
Member
 
Joined: Aug 2001
Posts: 200
Likes: 0
From: Somerset, NJ
Car: 1988 T/A WS6
Engine: none right now
Transmission: 700R4
I was originally thinking that using a 93 computer would work, but in that case, should I just find a whole motor from a 93?
Reply
Old Aug 8, 2004 | 11:30 PM
  #11  
Z28ricer's Avatar
Supreme Member
iTrader: (2)
 
Joined: Jan 2001
Posts: 4,149
Likes: 3
From: Tampa, FL, USA
Car: 93 240SX
Engine: LQ9
Transmission: T56
Axle/Gears: 3.54 R200 IRS
They still used the different pulse VSS IIRC, even the T56 and 4L60E use two different pulses, i guess if your dead set on a non electric controlled trans a 4L60 from a 93 behind a 94-97 T56 motor wouldnt be a bad idea, otherwise you've got to get a little bit creative, you'd be best off just getting a motor / auto trans combo.
Reply
Old Aug 9, 2004 | 08:49 AM
  #12  
lancerracer's Avatar
Thread Starter
Member
 
Joined: Aug 2001
Posts: 200
Likes: 0
From: Somerset, NJ
Car: 1988 T/A WS6
Engine: none right now
Transmission: 700R4
I know there are a few people on here that have used a 700r4 behind an LT1, how did they go about it?
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
midge54
LTX and LSX
18
Sep 2, 2020 07:13 PM
midge54
LTX and LSX
21
Dec 27, 2019 04:14 PM
midge54
Engine/Drivetrain/Suspension Wanted
1
Jan 29, 2017 07:00 PM
sreZ28
Engine Swap
4
Aug 14, 2015 07:48 PM
1992 Trans Am
Engine/Drivetrain/Suspension Parts for Sale
1
Aug 8, 2015 08:16 PM




All times are GMT -5. The time now is 06:54 PM.