4+3 to automatic conversion?
Thread Starter
Pro
Joined: Jun 2013
Posts: 526
Likes: 8
4+3 to automatic conversion?
I just picked up a project 84' with 60K miles it needs cleaned up and painted been sitting 10 years. My only grip is it's a manual has anyone here successfully swapped the Nash out for a 700r4 and everything working like it was factory? I know most will say buy an auto car but this is the one I'm playing with for now and I have the equipment to do the swap if it comes to that.
Melting Slicks
Joined: Mar 2002
Posts: 2,876
Likes: 764
From: Sligo PA
I just picked up a project 84' with 60K miles it needs cleaned up and painted been sitting 10 years. My only grip is it's a manual has anyone here successfully swapped the Nash out for a 700r4 and everything working like it was factory? I know most will say buy an auto car but this is the one I'm playing with for now and I have the equipment to do the swap if it comes to that.
Now with all that said if you do decide to swap the trans don't do a 700r4. I don't think GM made a transmission that was much worse to be honest. You can pick up a nice low mileage 4L60e for a very good price. You would just need a small ecu to run it. The Microsquirt ecu is a solid option. You can even pull a 411 PCM from a 4.3L Blazer or S10 and with a $75 harness have it run just a 4L60e without much issue. But that option requires you to use HPTuners or PCM Hammer to make work.
Thread Starter
Pro
Joined: Jun 2013
Posts: 526
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I’m still planning on doing this swap soon. None of the mechanical parts are an issue just the electrical portion. Does anyone know about what wiring harness feeds the auto trans and is the wiring that feeds the shifter a separate harness? I want to have the everything function properly I.E. shifter lockout, neutral safety, and lighting.
Melting Slicks
Joined: Mar 2002
Posts: 2,876
Likes: 764
From: Sligo PA
But at the end of the day it's not my car. The OP can of course do what they want. It just seems like a lot of work when you could just trade cars with someone.
Pro
Joined: Mar 2024
Posts: 537
Likes: 379
From: Northern California
I read your original post. I didn't think it was too critical. But I agree. There are so many people looking for a good C4 with a manual trans. To convert one to auto just seems odd. You could probably trade the car for a nicer auto and still probably get some cash out of the deal.
But at the end of the day it's not my car. The OP can of course do what they want. It just seems like a lot of work when you could just trade cars with someone.
But at the end of the day it's not my car. The OP can of course do what they want. It just seems like a lot of work when you could just trade cars with someone.
The main reason I edited my original post is because, like you said, it ain’t my car. If the OP goes through, it’ll surely be valuable information to someone else in the future.
Thread Starter
Pro
Joined: Jun 2013
Posts: 526
Likes: 8
Well if this 84 was a prize i would definitely not consider doing the swap and trade or sell it to find an auto. Fact is i bought the car sight unseen and it basically needs restored paint, interior ,fuel system,Ect. At that point why not play with it no one will want to tirade anything for something that looks that bad. Sure i could clean it up then trade it but i will have too much money in it to get out. Hope that puts things in perspective. Now if you know anyone that wants to trade a auto car for my project send them my way i would be happy to save then time!
Melting Slicks
Joined: Mar 2002
Posts: 2,876
Likes: 764
From: Sligo PA
Well if this 84 was a prize i would definitely not consider doing the swap and trade or sell it to find an auto. Fact is i bought the car sight unseen and it basically needs restored paint, interior ,fuel system,Ect. At that point why not play with it no one will want to tirade anything for something that looks that bad. Sure i could clean it up then trade it but i will have too much money in it to get out. Hope that puts things in perspective. Now if you know anyone that wants to trade a auto car for my project send them my way i would be happy to save then time!
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