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Final post on my jeep box install

norvalwilhelm

Well-known member
Joined
Apr 20, 2004
Messages
396
Location
Waterloo, ontario
Corvette
75 blown bigblock
This is my final post on the Jeep box. A quick refresher. I had my choice between a jeep box in kit form for $675 or Steroids for $1249. I could have built the steroids system myself but after talking to a number of guys decided to go with a stock 2003 Jeep Cherokee box that I bought for Pro South in mint condition.
I didn’t want to go with an adapter but decided to cut the side of the frame out and insert a 3/8 thick plate with the 4 holes drilled and taped to take the box directly. I also added 4 nuts to the back of the plate to give me ¾ inches of thread.
For alignment purpose I ended up cutting the plate about ½ inch into the frame at the front and almost flush at the back. I also had to drop the box down for alignment purposes.
This is a shot from above the box, check out the alignment. Slightly off but very close. I also gained header clearance.
efo2gm.jpg

This is a shot from the front. I posted a while ago on adaptors to fit the box and convert them to standard fittings like russel
efo57c.jpg


This shows the box from underneath. It bolts to the flat frame insert with 4 7/16th bolts.
efopvl.jpg


This again shows the alignment. To get this I had to insert the front of the box about ½ inch outboard. This was good. It gave added header clearance.
efoq5v.jpg


This shows the pitman arm I had to fabricate. I started with the stock piman arm but it was too long and at the wrong angle. It only matches the splines every 90 degrees.
I cut it in 3 pieces, put the steering box in the center of it’s travel, pointed the wheels straight ahead and installed the control valve end in this position.
I used the left over piece to join the 2 pieces together.
There is a procedure for welding like this. Roughly it involves knife edging everything for total penetration, welding from one side, grinding out the root pass from the other side and then filling in that groove and building up until the knife edges area is above the surrounding surface.
I did this twice and then ground everything down so it doesn’t show. No one looking at the pitman arm could tell it wasn’t stock. It really doesn’t take that long with a good mig welder turned on high with lots of wire speed.
efot1g.jpg

This is the final picture. Gone are all the lines, the control valve and the slave cylinder.

eforox.jpg
 
Was the Jeep steering box advantageous re: ratio versus a manual Vette box? My 73 is manual steer. I don't have a problem with it but my wife struggles with it.

-Mac
 
Mac said:
Was the Jeep steering box advantageous re: ratio versus a manual Vette box? My 73 is manual steer. I don't have a problem with it but my wife struggles with it.

-Mac

Vette manual or power run the same box. My Jeep ratio is about the same at 12 to 1. I don't like manual steering because of the turning effort for parking. I also run a braking system off my power steering pump.
Your steering system is old, probably a little play in the box and it tends to steer itself over rough roads.
You have two choices to update, a steroid rac and pinion or the jeep box. Both were available to me at a very low price.
I chose the jeep box because I felt it was a heavier unit, it really cleans up the underside of power assisted vets and I have read about too many problems with the rac and pinion.
Rack and pinion also costs $1249 VS jeep at $675.
Price did not influence my choice at all in selecting which system I decided to go with.
 
norvalwilhelm said:
Your steering system is old, probably a little play in the box and it tends to steer itself over rough roads.
When I did my restoration, I completely disassembled my suspension to componant. Everything that could be replaced... was replaced. The steering box wasn't sloppy so I cleaned it up, refreshed the fluids and put it back together. There was such a radical change in drive quality between before and after my restoration, I can't say for sure what change tightened things up but my Vette doesn't chase cracks. That being said, it's still "armstrong" steering so parking is a pain.

I'm not sure what the ratio is on my steering box; it is whatever was standard for 73.

-Mac
 
Mac you can just add a power steering pump, slave cylinder and control valve and you need not touch the box. Everything else was the same , power or manual.
Are your outer tie rods in the outer holes in the steering arms. For power they were in the inner holes, for manual they moved to the outer holes. My 75 still had both holes available. You will probably have to clean the plugs out of the outer holes but they are there.
 
norvalwilhelm said:
Are your outer tie rods in the outer holes in the steering arms. For power they were in the inner holes, for manual they moved to the outer holes. My 75 still had both holes available. You will probably have to clean the plugs out of the outer holes but they are there.
I don't recall two holes... I'll have to roll under and take a closer look... If it makes the old girl easier to steer, why not!!

-Mac
 
Mac said:
I don't recall two holes... I'll have to roll under and take a closer look... If it makes the old girl easier to steer, why not!!

-Mac

There are two holes, the outer is plugged and power assist uses the inners for a faster ratio.

Look at the end of the steering arm, it will be plugged but under the plugs is another hole, slows the ratio down but makes turning easier. I cut mine off just to make it look slimmer when doing the bump steer blocks.
 

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