Ls swap

2163 Views 21 Replies 6 Participants Last post by Mmusicman, 5 d ago

dawayne cotton

Discussion Starter · May 11, 2022

Hello my name is DaWayne and I am a procrastinator. Now that , that is out of the way. I know I'm not reinventing the wheel, but wanted to know if someone has any suggestions on how I will get a Gen1 Astro to shift a 4l65e transmission? Finding new obstacles every day. Transmission mounted and recess cut for A/C.

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AstroWill

· #2 · May 13, 2022

Use the wiring harness and PCM from the donor vehicle to control the engine and transmission.

Reactions: 2

stent

· #3 · May 16, 2022

AstroWill said:
Use the wiring harness and PCM from the donor vehicle to control the engine and transmission.

what he said..........

or aftermarket options :
Automatic Transmission Controllers - GM Transmission Make - 4L65E Transmission Type - Free Shipping on Orders Over $99 at Summit Racing

dawayne cotton

Discussion Starter · #4 · May 31, 2022

Thanks, for the input, but i did not communicate my question properly. I was questioning the shift linkage the 2004 uses a cable and the 1994 had a linkage assembly. Believe I can cut down rod and reweld and used the adapter from 1994 trans.

dawayne cotton

Discussion Starter · #5 · May 31, 2022

Have made some progress. I have got he motor in took removing exhaust manifolds front acc drive. Noticed there was no need to recess frame for ac have will over an inch between the two. With that have found my steering linkage grease zerk had to be removed to fit under oil pan.

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Mmusicman

· #6 · May 31, 2022

IT'S IN!!
Looks like it belongs!
Nice job!

stent

· #7 · May 31, 2022

awesome progress dawayne !

dawayne cotton said:
Thanks, for the input, but i did not communicate my question properly. I was questioning the shift linkage the 2004 uses a cable and the 1994 had a linkage assembly. Believe I can cut down rod and reweld and used the adapter from 1994 trans.

were you able to use your '94 shift rod on the cable shift '04 transmission???

dawayne cotton

Discussion Starter · #8 · Jun 2, 2022

With the motor sitting as low and forward as mine is. What is the opinion on lifting the engine approx. 1/2"? Where would the spacer be best placed at? Under frame mount, between the JTR mounts and LS mounting plate or between LS mounting plate and engine block.

dawayne cotton

Discussion Starter · #9 · Jun 4, 2022

We placed a 3/8 plate between the JTR mount and LS mounting plate. Have me the clearance needed for steering linkage. Now the problem lies with the ac lines jetting out straight into the upper control arm bolt/nut. Any ideas?

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M_a_t_t

· #10 · Jun 4, 2022

Are all the LS a/c compressors the exact same? Maybe one from a different car will have a different exit point.

Mmusicman

· #11 · Jun 4, 2022

Move the motor forward?
(huge amount of work..)
Have custom fittings made?

Unfortunately the LS swap is NOT a simple drop-in like the older V8's where everything fits the same. You'll likely need creativity and fabrication skills.. good luck. You'll be showing everyone else how to do it.

Reactions: 1

WoodButcher

· #12 · Jun 4, 2022

How it was done in my '05, this is the build thread Teddy put up when it was built. aka "Vandiction"

www.astrosafari.com

2005 AWD LS-V8 Swap

Found a complete LQ4 (iron LS truck block with everything including the computer) to drop into my van. Been reading threads so much here...appreciate all the info on the board. Thank you. Still have a few questions as I'm gathering all I (believe to) need in order to make this as seamless as...

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www.astrosafari.com

stent

· #13 · 12 mo ago

dawayne cotton said:
We placed a 3/8 plate between the JTR mount and LS mounting plate. Have me the clearance needed for steering linkage. Now the problem lies with the ac lines jetting out straight into the upper control arm bolt/nut. Any ideas? View attachment 284500

something like this with the correct mounting pattern for your compressor :

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dawayne cotton

Discussion Starter · #14 · 12 mo ago

Did see something like that. It appears to be a single center bolt torque and I do not have a threaded hole in between mine.

dawayne cotton

Discussion Starter · #15 · 12 mo ago

Some progress still going slow. Did get pedal assembled. Remembered reading about morphing the new and old together. That's what we did. Found a easy fix to connecting my fuel lines. More fitting than line. Seems expensive, but was easy.

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Mmusicman

· #16 · 12 mo ago

Wow that's a crazy amount of fancy expensive fittings.
Sure you couldn't just slide a rubber line over it like I did with mine?

Lot of work... looks good.

Reactions: 1

dawayne cotton

Discussion Starter · #17 · 12 mo ago

Might have, my brother thought we should have replaced them all the way back to the tank to at least felt like it was money well spent.

Is it ever. So far it has been the most expensive part of the swap.

Reactions: 1

stent

· #18 · 12 mo ago

dawayne cotton said:
Might have, my brother thought we should have replaced them all the way back to the tank to at least felt like it was money well spent. Is it ever. So far it has been the most expensive part of the swap.

good practice for the AC compressor..................

dawayne cotton

Discussion Starter · #19 · 9 d ago

Been almost a year since last post. Gotten some what further this year. Have the engine wiring finished and have at least started it for a brief second. Have the oil, fuel and temp gauge all working. Stuck on the speedo tried using 2004 sensor to 1994 wiring and got no reading at dashboard. Any suggestions?

WoodButcher

· #20 · 8 d ago

Glad to see your still at it, honestly my first thought would be to put in a more modern cluster that is the same year as the computer. '94 tech is antique compared to the '04.

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