Jeep steering box conversion
Thread Starter
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Jeep steering box conversion
Giving some consideration to this, and would like feedback and info from those who've either done it or have a good working knowledge of it; particularly on what's involved in adapting an installation or about any kits that may be available, what exact box is used (& box ratio), any significant installation issues which might present, any shortcomings, or answers to other questions I ought to be asking.
Figure I'm not the only one who might like to know, so don't assume I/we know much of anything about this in your replies.
TIA
Charlie
edit - FWIW, the car in question is a '78 w/manual steering, NOM BB & Hooker sidemounts.
Figure I'm not the only one who might like to know, so don't assume I/we know much of anything about this in your replies.
TIA
Charlie
edit - FWIW, the car in question is a '78 w/manual steering, NOM BB & Hooker sidemounts.
Last edited by TheSkunkWorks; Mar 12, 2009 at 01:53 AM.
Burning Brakes
Joined: Dec 2005
Posts: 992
Likes: 56
From: Baldwinsville, NY
What about these exact Replacement Mfg.
http://www.flamingriver.com/index.cf...rod/prd251.htm
http://www.classicperform.com/NewPro.../Series500.htm
Borgeson has a C3 Corvette PS replacement with 12:1 ratio.
http://www.borgeson.com/POWER%20STEE...lacements.html
http://www.classicperform.com/NewPro.../Series500.htm
Borgeson has a C3 Corvette PS replacement with 12:1 ratio.
http://www.borgeson.com/POWER%20STEE...lacements.html
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Norvil (now on one of the "other" forums) did his own conversion - but he is a master fabricator in my opinion!
www.corvettesteering.com has the complete conversion kits - good reviews in the past. I have been considering this option.
www.corvettesteering.com has the complete conversion kits - good reviews in the past. I have been considering this option.
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
If anyone is interested I have a 2002 Jeep Grand Cherokee box that has 6000 miles on it. I was going to do this conversion but I went to Steeroids instead. It is under my workbench if anyone is interested in a good box.
Last edited by Gordonm; Mar 12, 2009 at 04:31 PM.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
I belive the box comes from a 1999 series Grand Cherokee Jeep. Tom at Corvette Steering Service was the one who first marketed the kit. There are several others now on the market. I have a Wilcox sourced box that was made by Concept One MFG and requires no adapters to bol into the Vette chassis, but it was almost $950 after shipping. Corvette Steering Service box clears my Stailess Works 1.75" tube headers in my 70 LT-1. Haven't finished car with Concept One box yet (I think Vette Brakes also sells Concept One box.) Any of these are FAR SUPERIOR to fragile brackets and bad ground clearance issues of rack/pinion systems in my humble view.
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Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
No real reason. I bought the Jeep box with full intention of doing it and a Steeroids kit came along for a bargain so I bought it and shelved the Jeep box. Both are good upgrades.
Burning Brakes
Joined: Dec 2005
Posts: 992
Likes: 56
From: Baldwinsville, NY
Not to confuse anyone, but I was hoping someone has used this type of modern PS box:
http://72.167.214.73/catalog2/index.php?cPath=84_85,
I wanted to replace the old control valve and slave cylinder with this type of unit, like the Jeep conversion, but with no adaptors or mounting plates. Borgenson said it was a direct replacement and at $460 it looked like the price for what I would pay for a good manual steering box rebuild.
http://72.167.214.73/catalog2/index.php?cPath=84_85,
I wanted to replace the old control valve and slave cylinder with this type of unit, like the Jeep conversion, but with no adaptors or mounting plates. Borgenson said it was a direct replacement and at $460 it looked like the price for what I would pay for a good manual steering box rebuild.
Thread Starter
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
I'm still digesting this, so all I can offer in response at this point is to say thanks to those who have posted replies and to several others who have taken the time to PM me about this. Also, thanks mikep3 for pointing out the Borgenson option.
Not sure just what I'm going to end up doing, as other than parking lot issues I'm quite satisfied with my manual steering. However, since I'm in the middle of a major makeover anyway I thought it a good time to get better educated about this, you know, while I'm at it.
To backtrack for anyone not sure what we're talking about, IMHO the OEM PS is a PoS. After the one on my '78/SA tried (but failed) to put me in a pine box some years ago, I promptly converted to manual. The Jeep box conversion (et al) allows one to have PS on a C3 w/o the control valve and slave cylinder system.
TSW
Not sure just what I'm going to end up doing, as other than parking lot issues I'm quite satisfied with my manual steering. However, since I'm in the middle of a major makeover anyway I thought it a good time to get better educated about this, you know, while I'm at it.
To backtrack for anyone not sure what we're talking about, IMHO the OEM PS is a PoS. After the one on my '78/SA tried (but failed) to put me in a pine box some years ago, I promptly converted to manual. The Jeep box conversion (et al) allows one to have PS on a C3 w/o the control valve and slave cylinder system.
TSW
Pro
Joined: Oct 2007
Posts: 587
Likes: 0
From: Overland Park Kansas
I'd still like more info on this Jeep conversion. I hate the slop in my C3 system, it scares the hell out of me, and I don't want to pay $500 to have it rebuilt or replaced with the possibility of the same again.
Instructor
Joined: Sep 2007
Posts: 138
Likes: 1
There is a bolt on conversion were the lower portion of the gear that attaches to the frame has been welded on (maybe that is the Concept One box?).
There is also a DIY conversion that looks interesting:
http://www.vettemod.com/forum/showth...highlight=jeep
There is also a DIY conversion that looks interesting:
http://www.vettemod.com/forum/showth...highlight=jeep
Drifting
Joined: Oct 2002
Posts: 1,818
Likes: 13
From: ar
I have run the Jeep box for about 4 years and over 30000 miles. I feel like it is in the top 2 conversions I have done to my 63 in the last 39 years and over 250000 miles.
Add slotting the upper a frames and dialing in 5 degrees caster it will really make your C3 drive like a modern day car. Call Tom at Corvette steering services, I think his kit is 675.00, I wish he had it when I did my first one.
Jeff
Add slotting the upper a frames and dialing in 5 degrees caster it will really make your C3 drive like a modern day car. Call Tom at Corvette steering services, I think his kit is 675.00, I wish he had it when I did my first one.
Jeff
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
http://www.flamingriver.com/index.cf...rod/prd251.htm
http://www.classicperform.com/NewPro.../Series500.htm
Borgeson has a C3 Corvette PS replacement with 12:1 ratio.
http://www.borgeson.com/POWER%20STEE...lacements.html
http://www.classicperform.com/NewPro.../Series500.htm
Borgeson has a C3 Corvette PS replacement with 12:1 ratio.
http://www.borgeson.com/POWER%20STEE...lacements.html
Racer
Joined: Mar 2004
Posts: 292
Likes: 2
From: Plumas Lake CA
Norval's old buildup
Norvalwilhelm did a fairly intensive build-up to get the 99-04 Jeep Grand Cherokee box to fit with his big-block. He cut some metal out of the mounting area and the top of the frame to get the Jeep box to fit as far to the driver's side as possible (more clearance for his headers) and still align the steering shaft with the box's input shaft. He then had to modify the Jeep pitman arm by cutting and rewelding it to center on the Vette centerlink. Here are some links to his old posts.
http://forums.corvetteforum.com/c3-t...-jeep-box.html
http://forums.corvetteforum.com/c3-t...x-install.html
http://forums.corvetteforum.com/c3-t...box-today.html
Some additional notes:
Borgeson supposedly makes the correct joint to mate the Vette column to the Jeep box, 8DDx148. 8DD is for 18mm double D and the 148 is 1" by 48 spline for the Vette column.
A custom pitman arm is used in some of the commercial kits, but some have used a mid-seventies Chevelle style pitman.
The only negative side effect of the swap I've heard of is overly sensitive steering at higher speeds, as the Jeep must use some type of speed sensitive circuitry that our cars can't incorporate?
I'm about to pull the trigger on this project in the next couple of weeks (I hope!). I still need to order my Borgeson joint - I hope Summit can get one for me. I'm going to try to weld a mount plate into the car like Norval did.
http://forums.corvetteforum.com/c3-t...-jeep-box.html
http://forums.corvetteforum.com/c3-t...x-install.html
http://forums.corvetteforum.com/c3-t...box-today.html
Some additional notes:
Borgeson supposedly makes the correct joint to mate the Vette column to the Jeep box, 8DDx148. 8DD is for 18mm double D and the 148 is 1" by 48 spline for the Vette column.
A custom pitman arm is used in some of the commercial kits, but some have used a mid-seventies Chevelle style pitman.
The only negative side effect of the swap I've heard of is overly sensitive steering at higher speeds, as the Jeep must use some type of speed sensitive circuitry that our cars can't incorporate?
I'm about to pull the trigger on this project in the next couple of weeks (I hope!). I still need to order my Borgeson joint - I hope Summit can get one for me. I'm going to try to weld a mount plate into the car like Norval did.
Drifting
Joined: Oct 2002
Posts: 1,818
Likes: 13
From: ar
Norvalwilhelm did a fairly intensive build-up to get the 99-04 Jeep Grand Cherokee box to fit with his big-block. He cut some metal out of the mounting area and the top of the frame to get the Jeep box to fit as far to the driver's side as possible (more clearance for his headers) and still align the steering shaft with the box's input shaft. He then had to modify the Jeep pitman arm by cutting and rewelding it to center on the Vette centerlink. Here are some links to his old posts.
http://forums.corvetteforum.com/c3-t...-jeep-box.html
http://forums.corvetteforum.com/c3-t...x-install.html
http://forums.corvetteforum.com/c3-t...box-today.html
Some additional notes:
Borgeson supposedly makes the correct joint to mate the Vette column to the Jeep box, 8DDx148. 8DD is for 18mm double D and the 148 is 1" by 48 spline for the Vette column.
A custom pitman arm is used in some of the commercial kits, but some have used a mid-seventies Chevelle style pitman.
The only negative side effect of the swap I've heard of is overly sensitive steering at higher speeds, as the Jeep must use some type of speed sensitive circuitry that our cars can't incorporate?
I'm about to pull the trigger on this project in the next couple of weeks (I hope!). I still need to order my Borgeson joint - I hope Summit can get one for me. I'm going to try to weld a mount plate into the car like Norval did.
http://forums.corvetteforum.com/c3-t...-jeep-box.html
http://forums.corvetteforum.com/c3-t...x-install.html
http://forums.corvetteforum.com/c3-t...box-today.html
Some additional notes:
Borgeson supposedly makes the correct joint to mate the Vette column to the Jeep box, 8DDx148. 8DD is for 18mm double D and the 148 is 1" by 48 spline for the Vette column.
A custom pitman arm is used in some of the commercial kits, but some have used a mid-seventies Chevelle style pitman.
The only negative side effect of the swap I've heard of is overly sensitive steering at higher speeds, as the Jeep must use some type of speed sensitive circuitry that our cars can't incorporate?
I'm about to pull the trigger on this project in the next couple of weeks (I hope!). I still need to order my Borgeson joint - I hope Summit can get one for me. I'm going to try to weld a mount plate into the car like Norval did.
Tom resplines the pitman shaft so you use the stock corvette pitman arm.
Jeff
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
then engines, brakes,
NONE of these cars is alike anymore....even the NCRS resto's no matter how much they think so...
