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#1069484 - 02/06/21 06:10 PM Newbie  
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Moonbenders Offline
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Moonbenders  Offline
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White city OR
Looking at swapping a 6.2 into a 85 Monte and wondering what are the best automatic trans options are , what kind of money am I looking at to have a shop do this kind of swap and what kind of money am I looking at to have this done ?

#1069485 - 02/06/21 06:58 PM Re: Newbie [Re: Moonbenders]  
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upflying Offline
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Reno, NV
I did my LS3 swap in my garage over a period of 6 months. Holley has all bolt in pieces to make it easy.
4L80E is the best trans but mine works well as long as I dont beat on it too much.

Last edited by upflying; 02/06/21 06:59 PM.

86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, Dakota Digital, silver with maroon bench interior

#1069486 - 02/06/21 07:18 PM Re: Newbie [Re: Moonbenders]  
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CM1SCW Offline
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Lenoir City, TN
Well the skies the limit. You can spend as much as you want. But do your research on the shop a lot of them will say yes and take advantage and take your money. My project is the 87 monte carlo aero ls3/6l80 swap and the shop doing mine is doing an excellent job they put 150 hours into the swap as of now. Most put the 4l65 or 4l80 into the ls3 swaps. Cost depends on used or new, GM performance sells connect and cruise packages with warranties, which is the direction I went. Everything is installed and they are building the exhaust. Final work will be the electric wiring and first startup. I am not sure I gave you what you wanted to know mine is on the high end for the most part. Just do your research and use a reprable shop that has done ls3 swaps my shop has done many.

#1069489 - 02/06/21 09:51 PM Re: Newbie [Re: Moonbenders]  
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upflying Offline
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Reno, NV
One other point to consider is emission testing. White City, Oregon appears to be near Medford which requires emission testing. The LS swap wont pass an Oregon emissions visual test. Oregon shops may not agree to preform a swap if it is considered illegal.


86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, Dakota Digital, silver with maroon bench interior

#1069491 - 02/06/21 10:55 PM Re: Newbie [Re: Moonbenders]  
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Buick Runner Offline
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Dharma station 1 the Hydra
The only emission legal LS swaps are the Erods from GM.


SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes, and Jmod.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.
#1069492 - 02/06/21 11:35 PM Re: Newbie [Re: Moonbenders]  
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Moonbenders Offline
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White city OR
Thank you for all the input I’ll be doing the swap but everything I do is off road builds and ls engines I want to be fair to my customer as well as not short my self on estamites prob go with a 48loe and a Holley system as I’m familiar with those check us out on any social media platform to see our racing program 😀

#1069562 - 02/14/21 02:49 AM Re: Newbie [Re: upflying]  
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jmireles Offline
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jmireles  Offline
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El Paso, Tx
Originally Posted by upflying
I did my LS3 swap in my garage over a period of 6 months. Holley has all bolt in pieces to make it easy.
4L80E is the best trans but mine works well as long as I dont beat on it too much.


I too have the 4L65e, although it bolted to an LS2. I don't feel like I have abused the tranny but I do romp on it on occasion and it has help up just fine after 5 years.


-'87 Monte SS LS 2/4L65e Quick Perf. 9" w/disk brakes
-'89 Iroc Z28 Stock 5.7 Edelb. TES headers, Borla Exhaust90K
-'77 Trans Am 468(Stroked) Doug's Headers Flowmaster catback
B & M shift Kit 400 Turbo trans. Edel brock Performer
RPM Intake Sean Murphy built Rochester Carb. Restored
in '08. 3K
#1069566 - 02/14/21 02:38 PM Re: Newbie [Re: jmireles]  
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upflying Offline
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upflying  Offline
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Reno, NV
Originally Posted by jmireles
Originally Posted by upflying
I did my LS3 swap in my garage over a period of 6 months. Holley has all bolt in pieces to make it easy.
4L80E is the best trans but mine works well as long as I dont beat on it too much.


I too have the 4L65e, although it bolted to an LS2. I don't feel like I have abused the tranny but I do romp on it on occasion and it has help up just fine after 5 years.

Mine works great except for the feel of the 2-3 upshift..like some slop or slip..maybe it needs programing or something.


86 MCSS Notchback coupe, LS3, 4L65E, QP 9", Eaton Truetrac, 4 wheel disc, column shift, Dakota Digital, silver with maroon bench interior

#1069632 - 02/21/21 03:19 PM Re: Newbie [Re: Moonbenders]  
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Posts: 640
jmireles Offline
10+ Year
jmireles  Offline
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Joined: Nov 2008
Posts: 640
El Paso, Tx
Upflying,

I took my Monte to have the shift points changed. I really disliked how the transmission shifted through all 4 gears by 30 or 35 MPH. It made the engine bog down some in 4th gear. I need to take it back and have them tweak the settings, at least the 1-2 shift. Its shifts at around 3K RPM. If you're doing some moderate to spirited driving then it's all good but if driving around the neighborhood...

Maybe having the transmission controller adjusted? Or maybe we should just replace our trannies with a Tremec 5 or 6 speed!


-'87 Monte SS LS 2/4L65e Quick Perf. 9" w/disk brakes
-'89 Iroc Z28 Stock 5.7 Edelb. TES headers, Borla Exhaust90K
-'77 Trans Am 468(Stroked) Doug's Headers Flowmaster catback
B & M shift Kit 400 Turbo trans. Edel brock Performer
RPM Intake Sean Murphy built Rochester Carb. Restored
in '08. 3K

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