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Ecklers AutoMotive
Username Post: Rack and Pinion conversion        (Topic#346989)
ratnfested 
Valued Contributor
Posts: 2957
ratnfested
Loc: Rochester, NY. USA
Reg: 03-13-00
09-05-17 10:19 AM - Post#2706740    

Hi all. Its been a while. I am looking to start a R&P conversion on the Chevelle. I know kits are made for 68-72 chevelles and there is one for 75-81 F body. and we use the same sway bar as the Fbody so I am am wondering if the frame spacing between the gear box and the idler arm are the same or close. I have to find a buddy with an F-body of that gen and see what the measurements are. Has anyone done one and have any input for me?

Oh BTW I put a 4l80E in the Chevelle last winter. Used a TCI/FAST controller. Works pretty nice. Shifts good. Not happy that the controller cannot individually tune the shifts. If you want to firm up 2-3 you have to firm up all of them.

Philip Ferrera
1977 Chevelle
1977 Malibu Classic
1986 Grand Prix
1995 Tahoe
2003 Impala LS
2004 Ski Doo REV
Street Machines of Rochester NY


 
Ecklers AutoMotive
raycow 
DECEASED
Posts: 27999
raycow
Loc: San Francisco, CA
Reg: 11-26-02
09-05-17 12:59 PM - Post#2706753    
    In response to ratnfested

I'm not sure if such a R&P conversion exists, unless you want to go to a complete crossmember swap like a M-II or one of its clones.

Just out of curiosity, what do you expect to gain over the stock PS gear and linkage? I have driven the stock setup and it didn't seem all that bad.

Ray


Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
ratnfested 
Valued Contributor
Posts: 2957
ratnfested
Loc: Rochester, NY. USA
Reg: 03-13-00
09-06-17 06:13 AM - Post#2706803    
    In response to raycow

I am hoping to get the feel of a tight steering with no play. Like a newer vehicle. I put urethane bushing and new sway bars in the car and it handles really nice. The steering would be a nice addition to complete it. I did buy an AGR box a few years back but I do not really like it. It is a 12:1 but seems to have more assist to the right than left. And still has that inherit play that gear boxes have. In looking at the kits out there, they have a frame that mounts where the gearbox and idler arm go. If I could find the dimensions for another vehicle are the same or close I might be able to make one fit.

Philip Ferrera
1977 Chevelle
1977 Malibu Classic
1986 Grand Prix
1995 Tahoe
2003 Impala LS
2004 Ski Doo REV
Street Machines of Rochester NY


 
Magno99900 
Senior Member
Posts: 667
Magno99900
Age: 33
Loc: Pittsburg, CA
Reg: 01-01-05
09-08-17 08:43 PM - Post#2707114    
    In response to ratnfested

If you want the feel of rack and pinion, just switch to a 600 series gear box (turn one or lee, just some that came to mind quickly)

They are lighter and bolt right in. They use the exact same valving as a rack and pinion set up so they have nice tight center feel.



 
ratnfested 
Valued Contributor
Posts: 2957
ratnfested
Loc: Rochester, NY. USA
Reg: 03-13-00
08-27-18 06:44 AM - Post#2744528    
    In response to Magno99900

I have an 800 series now. I am told those are built better all steel and its a 12:1 nice and tight. I just thought a R&P would be a step up.


Philip Ferrera
1977 Chevelle
1977 Malibu Classic
1986 Grand Prix
1995 Tahoe
2003 Impala LS
2004 Ski Doo REV
Street Machines of Rochester NY


 
Shepherd 
Frequent Contributor
Posts: 1785

Loc: Lake George, NY
Reg: 11-11-15
08-27-18 07:35 AM - Post#2744539    
    In response to ratnfested

Besides the more precise feel of r and p, another big advantage of this change is getting rid of the pitman, center link and and idler arm, added up all points of poor steering response if they are even slightly worn.



 
wagonman100 
Super Senior Member
Posts: 14274
wagonman100
Loc: Baltimore, MD
Reg: 11-27-04
10-18-18 07:53 PM - Post#2749017    
    In response to ratnfested

The mounting of the unit is a secondary concern. The factory mounts are usually two bosses cast into the housing and are pretty close together. You can get a framework fabbed up to securely mount the rack to the frame and the frame to your cars frame. Your main concern should be the width of the main part of the rack itself. Your pivot points for the tie rods should be at a width very close to the distance between the forward mount bolts for your lower control arms. If this measurement is not close you can get severe bump steer. You will also have to make sure your power steering pump is putting out the correct pressure for the rack.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 
Ecklers AutoMotive
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