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Old 06-14-2018, 09:10 PM   #1
Uncle Mike
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Join Date: Dec 2015
Location: Otis Oregon
Posts: 9
Steering Issue

We installed a power steering unit and had the front end rebuilt and then aligned twice by two different companies. As you drive it down the road it wants to pull you to the left or right. It's extremely noticeable in a corner. We took off the belt to the power steering unit to eliminate the power steering thinking that might be it, but it still continues to do it. Super high pucker factor! Any ideas?
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1965 LB C10. 350 SB, TH350, 4.10
1966 LB C20, 292 I6, SM 420, 4.56
1966 Custom Camper, SB 350, TH350, 4.10
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Old 06-14-2018, 10:31 PM   #2
Uncle Mike
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Location: Otis Oregon
Posts: 9
Re: Steering Issue

It straight lines good but when you start to turn, it feels like the steering pressure falls off and then when we try to correct, it wants to shoot off to the opposing side.
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1965 LB C10. 350 SB, TH350, 4.10
1966 LB C20, 292 I6, SM 420, 4.56
1966 Custom Camper, SB 350, TH350, 4.10
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Old 06-15-2018, 12:02 AM   #3
Captainfab
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Location: Coeur d'Alene, Idaho
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Re: Steering Issue

Are the box and pump used or new/rebuilt? Do you have it plumbed correctly?
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Old 06-15-2018, 12:20 AM   #4
Uncle Mike
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Location: Otis Oregon
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Re: Steering Issue

We put a new steering gearbox and pump in it and then took it in to get a front end alignment where the mechanic adjusted the box. A different mechanic said it should be kept at manufacturer specifications so we replaced it with another one. We still have the same problem. What do you mean about being plumbed correctly?
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1965 LB C10. 350 SB, TH350, 4.10
1966 LB C20, 292 I6, SM 420, 4.56
1966 Custom Camper, SB 350, TH350, 4.10
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Old 06-16-2018, 01:26 AM   #5
andyh1956
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Join Date: Mar 2010
Location: thomastown mississippi
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Re: Steering Issue

If you are talking about adjusting the screw at the top of the box that moves the sector gear up & down confirm with your mechanic that he made the adjustment correctly.
Thus: When adjusting the backlash on the sector to worm on recirculating ball assy the backlash must be checked by moving steering arm back & forth (This requires removal of the steering linkage from the arm) and NOT rotating the input shaft!
Also the adjustment must be made with the wheels & box in the "Straight Ahead" position.
Your problem sounds like the classic mis-adjusted steering box.
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Old 06-16-2018, 01:29 AM   #6
Captainfab
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Join Date: Mar 2007
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Re: Steering Issue

What I mean, is do you have the pressure hose connected to the correct port on the steering box?

Quote:
Originally Posted by Uncle Mike View Post
We put a new steering gearbox and pump in it and then took it in to get a front end alignment where the mechanic adjusted the box. A different mechanic said it should be kept at manufacturer specifications so we replaced it with another one. We still have the same problem. What do you mean about being plumbed correctly?
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Power Steering Box Adapter Plates For Sale HERE
Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE
Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE
Hydroboost Mounting Plates HERE
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Old 07-09-2018, 07:44 PM   #7
Uncle Mike
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Location: Otis Oregon
Posts: 9
Re: Steering Issue

Figured out what the issue was. It was the Power Steering Gearbox. We ended up going through two different Napa gearboxes and found out that the shaft that connected to the pitman arm had up to a 1/4 inch of slop when we turned the wheel. We ended up buying a Redhead Steering Gearbox and that solved that problem.
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1965 LB C10. 350 SB, TH350, 4.10
1966 LB C20, 292 I6, SM 420, 4.56
1966 Custom Camper, SB 350, TH350, 4.10
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Old 07-10-2018, 12:34 AM   #8
Captainfab
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Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 21,182
Re: Steering Issue

Glad to hear you solved the issue. It sounds like Napa is having some quality control issues.
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Power Steering Box Adapter Plates For Sale HERE
Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE
Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE
Hydroboost Mounting Plates HERE
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