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Old 10-17-2019, 02:49 PM
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Question 700r4 swap

I have a 84 Monte Carlo with a 350 in it currently has a turbo 350 I was looking for info on donor cars that would be good candidates for the 700 R4 thank you

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Old 10-17-2019, 03:31 PM
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Quote:
Originally Posted by ray6914 View Post
I have a 84 Monte Carlo with a 350 in it currently has a turbo 350 I was looking for info on donor cars that would be good candidates for the 700 R4 thank you
You want the 1987 to 1992 version, these have all the fixes and thete were many.

You also need the throttle linkage and brackets as the 700R4 uses cable operated mechanical modulation with kick down as one integrated system where the TH350 uses vacuum modulation and mechanical kick down as two seperate systems. Installation instructions are on the web, they need to be explicitly followed or you smoke its guts faster than you can read this.

You'll have to deal with rear mount and driveshaft when you get there, usually minor mods to the mount and driveshaft shortening are in order.

Given that most wrecking yard 700R4's and 4L60's (not the same as 4L60E) have their best years behind them, just buying a rebuilt is in the long run less expensive. To that vain you want something more erformance oriented to insure you're getting a late production model with beefed up parts added.

Bogie
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Old 10-18-2019, 06:30 AM
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Okay thank you for all the information
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Old 10-18-2019, 08:43 AM
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200-4R trans is a bolt-in swap, as that is what overdrive Chevy put in the Monte SS. No driveshaft mods, minor crossmember mods(crossmember moved back in frame).

It is a better trans too, especially when built up. Better gear ratio's.

The 700R4 is overrated, in stock form it doesn't have very good durability if you make decent power, and that ultra low 1st gear is awful for any real performance build.

If you want a super strong overdrive, do a 4L80 swap...it is basically an overdrive TH-400.
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Old 10-18-2019, 11:50 PM
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Yeah the SS 305 made a whopping 180 horsepower.

Bogie
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Old 10-19-2019, 02:20 AM
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Get an 87-93 chevy truck. Rolled or just rusted to heck.

Pull the 305/350, 700r4, 10 bolt with 3.08-3.73 rear(4.11/4.56 more 3/4&1ton).

Pull the computer saving the harness or buy a plug and play harness off the net for around $300.

Upgraded everything with a bit more hp and fuel injection.
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