Source for Quick Ratio Boxes? New/Used

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pontiacgp

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Mar 31, 2006
29,270
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Kitchener, Ontario
I have a 87 IROC box in mine with Jeep shaft. Makes a huge difference but turning radius does suffer

there is an adjustment you can use to shorten the turning radius, when you are making a tight or u-turn quickly press down the pedal under your right foot.....:)
 
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oldsmobile joe

Royal Smart Person
Nov 12, 2015
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i prefer the iroc boxes my self. all my cars run them. why you ask?

first, they have one of the smallest pitman arm swings of that steering box generation. irocs have a 64 degrees of swing, regular f-body gears are 70 degrees.
by running the smaller swing, i have no or less issues with front tires rubbing the fender or fender liner at max turns.

second, by having all my cars running them, the steering is more consistent for me when i jump from one to another. yes i do loose some turning radius, but i compensate by swinging a little wider and turning a little earlier. you don't notice it once you get used to it.

i buy all mine used, mostly u-pull yard finds, and craigslist. all have worked fine and no leaks. maybe I'm just lucky.

here are a couple of links with more info.
https://www.chevelles.com/techref/shea_3.html
https://www.chevelles.com/techref/pdf/1983-96saginaw800fastratiogears.pdf
https://www.chevelles.com/techref/pdf/1992-98grandcherokeefastratiostrggear01ja2013.pdf

i measure the pitman arm degree swing before purchase by using the angle meter app on my phone. slick set up.
 
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Ribbedroof

Comic Book Super Hero
Supporting Member
Jan 4, 2009
4,862
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Wellston, OK
Here's where I got mine

iHioua.jpg


Sorry, couldn't resist. Might have been the most usable part of the car
 
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83beater

Greasemonkey
Jan 31, 2019
118
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Got mine from napa
 

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ssn696

Living in the Past
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Jul 19, 2009
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there is an adjustment you can use to shorten the turning radius, when you are making a tight or u-turn quickly press down the pedal under your right foot.....:)
Of course, there is the Jim Rockford one-point U-turn from reverse...
 
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