LT1 to LS1 Swap
Thread Starter
Launching!
Joined: Jun 2009
Posts: 299
Likes: 1
From: The Woodlands,Texas/New Orleans
LT1 to LS1 Swap i have a 94 trans am with the 98-02 body conversion with a strong modified LT1 engine but i just got a LS1 for a cheap price complete with wire harness and trans how can i make this swap possible? can i use my LT1 transmission (i have a lot of work in my LT1 transmission) i also have a dash from a 2000 Camaro my T/A dash is cracked i saw a 93 Camaro with a T/A dash the only thing im concerned about is the wires i know its possible but i just need some guidance
The transmission you have doesn't have the pulse width modulated torque converter lock up so it won't work in newer applications. If you had 95 or newer all you'd need to do is get the converter pilot spacer and either redrill the flexplate or get the one with proper bolt spacing. It will bolt to the block just doesn't use the one hole in the bellhousing.
im in the middle of a simalar swap if you aren't good with wiring current performance modified my ls1 harness for my 95 TA and they only chared me 175 wich i thought wasnt to bad compared to speartech who wanted 500 for the conversion harness
Hi..here is a thread that will help ya with some wiring..
https://ls1tech.com/forums/conversio...to-95-z28.html
The 1997 & back Auto Trans are different from the 1998-02's. If you are an auto..which unless I missed it I don't think it was specified what exactly you had..you will need a 1998-02 4L60E Trans.
You will need a LS1 Style T56 if you are that..you can convert the LT1 one, but it's easier to find a LS1 T56.
https://ls1tech.com/forums/conversio...to-95-z28.html
The 1997 & back Auto Trans are different from the 1998-02's. If you are an auto..which unless I missed it I don't think it was specified what exactly you had..you will need a 1998-02 4L60E Trans.
You will need a LS1 Style T56 if you are that..you can convert the LT1 one, but it's easier to find a LS1 T56.
97 and older are different but 95 and newer can be used with the converter pilot spacer.
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A 1-2 solenoid
B 2-3 solenoid
C Pressure control hi
D Pressure control low
E Ignition power
L Temp signal
M Ground
N Range sig A
P Range sig B
R Range sig C
S 3-2 solenoid
T TCC solenoid
U TCC PWM solenoid
94 didn't have PWM solenoid which is why they don't work. Seriously all I did was plug it in and drive. I used the spacer and flexplate from Advanced adaptors and used one less bolt in the bell housing.
The ones that have not tried to fit a pre 97 trans on, why put your input and say it wont fit? IT WILL FIT! I have had a LT1 4l60e, 700r4, ls1 4l60e and th400. ( im using the th400 and will never go back. ) THEY ALL WORK. Of course the non ls1 trans you DO need the spacer or the flex plate. I personally just use the spacer.
Flame obviously knows what he is takling about. The plugs are the same, just the VSS is a different plug, just wire it correctly and your set.
Flame obviously knows what he is takling about. The plugs are the same, just the VSS is a different plug, just wire it correctly and your set.
Ok i just drug my 2 transmissions out of the garage one a 1995 lt1 4l60e and one a 2003 2 wheel drive 4l60E. The main transmission harness plug is the same it plugs in fine. The 2003 vss connector is way different and wont plug in. The ls1 style has a way smaller plug. I have the harness for both transmissions I swapped the plugs both ways lt1 to ls1 and ls1 to lt1 to be sure the main connector plugs in and the connectors are the exact same. Hope this helps you guys some.
How about you go look at the wiring diagrams and read them correctly and see that they are the same. Quit telling people it won't work when it does. Like said above if you haven't done it STFU.
Not really to concerned with a wiring diagram..I'm not wiring one up any time soon.
Edit.. after one phone call to my Auto Tranny guy I got this..
The wiring pinouts for a 1996-1997 is the same as a 98-02, HOWEVER, the ohm ratings in the 1998-02 circuits are different from the 1996-97. If you tune it and adjust the line pressures in the 1996-1997 type, it works just fine.
But if he's wrong about that let me know..he only manages a Tranny shop and has been doing this stuff forever..
Last edited by the_merv; Dec 18, 2009 at 08:07 AM.
Edit.. after one phone call to my Auto Tranny guy I got this..
The wiring pinouts for a 1996-1997 is the same as a 98-02, HOWEVER, the ohm ratings in the 1998-02 circuits are different from the 1996-97. If you tune it and adjust the line pressures in the 1996-1997 type, it works just fine.
But if he's wrong about that let me know..he only manages a Tranny shop and has been doing this stuff forever..
The wiring pinouts for a 1996-1997 is the same as a 98-02, HOWEVER, the ohm ratings in the 1998-02 circuits are different from the 1996-97. If you tune it and adjust the line pressures in the 1996-1997 type, it works just fine.
But if he's wrong about that let me know..he only manages a Tranny shop and has been doing this stuff forever..