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Old 05-28-2013, 04:55 PM
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Modification of R&P unit for longer travel?

The Cavalier power rack & pinion (or equivalent) is the only center-take-off unit that I read about that is an OEM unit.
Unfortunately this R&P only has a total travel of 6 inches and I need 7 inches.
Does anyone, who knows the construction of these R&P, know if it would be possible to modify this R&P unit for a longer travel?
Thanks
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Old 05-29-2013, 07:23 AM
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Mutt, just make sure your car is rear steer with the Cavalier unit.If not, look at the '99-'00 Dodge Intrepid (and other Chryslers) CTO unit. It is front steer and 7" travel. Steve
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Old 05-29-2013, 07:25 AM
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Mutt, I have seen in Unisteer's ads for '58-'62 Impalas that they use a CTO front steer rack but can't seem to get a reply about buying just the rack.
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Old 05-29-2013, 09:29 AM
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The setup in his picture is rear-steer.

There is no way to modify the rack for more travel, it is what it is and that's it. You'd have to move the tie rod ball joint holes in the steering arms in, as much as there is enough material on the casting, by offset-boring the hole and pressing/welding in a sleeve w/ tapered hole, also offset inward (meaning closer to the spindle), to get effectively faster steering, and reduce the requirement for travel at the rack.

It's possible some of the kits use a larger rack with an attached bracket that puts the inner tie rods at the center or in any position along it. Anybody who made those setups could surely do a custom based on one of their normal units, and put the holes where you need them.
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Old 05-30-2013, 04:41 PM
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My car is rear steer and I need about 7 inches of total travel on a rack & pinion.
As sbutler pointed out the Cavalier center take off (cto) and is rear steer, but they only has about 6 inches of travel so that would increase my turn radius.
He pointed out the Intrepid has 7" travel and is cto, but front steer so no dice.
I'm looking at 05 & newer Dodge Durango, which is rear steer. It is not cto but I could attach a bracket from end to end as kso mentioned.
I'll update with Durango travels when I acquire them.
Thanks
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Old 05-30-2013, 06:33 PM
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I'd hit the drifting boards they make their racks turn the tire 90* from the body..
so it can be done..
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Old 05-31-2013, 10:34 AM
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Here's an update on what I found about 04-09 Dodge Durangos.
These rack and pinions are rear steer and have an overall travel of 6.9 inches which will result in only a minor increase in turn radius for my car.

1) Does anyone have pictures and material thickness of a brackets they have seen used to bridge the end tie rods attach points and allow center take off?

Thanks
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Old 06-20-2013, 02:19 PM
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For anyone following this thread here's some more info I found.
The 04-09 Durango is rear steer r&p with 6.9" travel.
The steer column is approximatly positioned 13.5" from the center at an outward angle.
My 37 buick has a frame at tie rods that is 20" inside and 26" outside.
I would have to shift the r&p off-center approx 3 inches towards driver side for the input to be on outside of the frame.
I would be making a bracket that bridges the end take off connections and makes a center take off. Could adjust the position of the tie rod connections on that bracket for equal length tie rods.
1) Does anyone see a problem with this approach?
Thanks
Mutt
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