Buick Grand National steering box?? - Chevelle Tech
Brakes, Suspension & Steering Conversion questions & more.

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  • 1 Post By SSuper Dave
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post #1 of 11 (permalink) Old Apr 11th, 19, 12:44 PM Thread Starter
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Buick Grand National steering box??

I had read but cannot find it anymore with search feature. I remember a post about putting a 87 Buick Grand National steering box in an A body Chevelle. I am building a 66 Chevelle and was curious to any mods or recommendations on this.
Thanks in advance

Kevin
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post #2 of 11 (permalink) Old Apr 11th, 19, 3:44 PM
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Re: Buick Grand National steering box??

Works well, but limits your turning radius. A Monte Carlo SS and Olds 442 FE3 box should be the same, remans run around $120, or they did a few years ago when I put one in my daughter's '82 El Camino.
The Jeep Grand Cherokee box is a better choice for no more money, and the mods needed to install it are negligible. Check out the sticky at the top of this forum, a bunch of us have used then with good results.
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post #3 of 11 (permalink) Old Apr 11th, 19, 5:54 PM
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Re: Buick Grand National steering box??

Jeep Grand Cherokee is what I used. That and stiffer coil springs have been the best bang for the money spent on my 66.
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post #4 of 11 (permalink) Old Apr 11th, 19, 7:48 PM Thread Starter
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Re: Buick Grand National steering box??

I looked at the jeep box but have a rebuilt Buick box already so I would like to use it. Why would I loose turning radius??? What is all needed for this mod? Ie pitman arm or column shaft/rag joint?
Thanks again for the opinions

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post #5 of 11 (permalink) Old Apr 11th, 19, 8:45 PM
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Re: Buick Grand National steering box??

It appears the internal stops inside the box might limit how far the steering wheel can turn but I have no direct experience with a Grand National box. Take a look at the two Pitman arms - do they look the same? Same shape and spline count?

I love my JGC steering box swap and there might not be as many people that have a Grand National box. My JGC box did need a new rag joint but I needed a new one anyway to replace my original from 1970. The hardest part of this swap for me was getting the Pitman arm on the JGC box pressed off with a really big hydraulic press.

For the price, it is very difficult to go wrong with a JGC box. It cost me $25 for the box and $25 for the yard to pull it for me.

Rick
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post #6 of 11 (permalink) Old Apr 11th, 19, 9:15 PM
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Re: Buick Grand National steering box??

Yeah butÖ WHY?? The stock one does the job fine...

Claude.

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post #7 of 11 (permalink) Old Apr 11th, 19, 10:29 PM
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Re: Buick Grand National steering box??

IIRC, it's the Camaro/Trans Am box that has the internal limits, Good luck!!

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post #8 of 11 (permalink) Old Apr 12th, 19, 5:57 AM Thread Starter
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Thumbs up Re: Buick Grand National steering box??

Quote:
Originally Posted by LeoP View Post
IIRC, it's the Camaro/Trans Am box that has the internal limits, Good luck!!

Thanks for the heads up, appreciate it.

Quote:
Originally Posted by toofastforyou View Post
Yeah butÖ WHY?? The stock one does the job fine...

Claude.

Claude I heard the GN box tightens the steering feel for the A body, and I have a few Grand National parts laying around.

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post #9 of 11 (permalink) Old Apr 12th, 19, 2:21 PM
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Re: Buick Grand National steering box??

According to the Jim Shea steering papers, only the Jeep GC and the 88-96 GM "B" body boxes have the necessary 43.5 deg or more (half) travel. These will not reduce your turning radius. The "G" body boxes will have less turning radius at 39.25 deg (half).

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post #10 of 11 (permalink) Old Apr 12th, 19, 3:29 PM
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Re: Buick Grand National steering box??

Quote:
Originally Posted by toofastforyou View Post
Yeah butÖ WHY?? The stock one does the job fine...

Claude.
Less turns of the steering wheel and is one component of making your chevelle drive more like a modern car.
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post #11 of 11 (permalink) Old Apr 16th, 19, 4:22 AM
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Re: Buick Grand National steering box??

Chevelles need the full 88 degrees turn on the Pitmann shaft. no camaro /firebird box I know of has that. They have steering stops (travel limiters) inside the box. They will work on a Chevelle but like already said it'll take the whole lower 40 to turn it around. Don't ask how I know this.
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