LS Swap eating power steering boxes and pumps. - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 04-03-2019, 11:52 AM   #1 (permalink)
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LS Swap eating power steering boxes and pumps.

So I have an LS swapped YJ converted the lines to AN fitting and using Russell -6 hose. Steering works great for a week or two then I start developing dead spots in the steering intermittently. Running 37" tires on a 79d60 when its working well I have no trouble turning the wheel and it doesnt seem to be straining. I plan on doing hydro assist but Im not sure thats going to be the fix for this issue. Are the lines to small? Do dead spots mean a pump issue or box issue? I have a trip and two weeks and I dont want to lose steering during the trip. Thanks
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Old 04-03-2019, 12:51 PM   #2 (permalink)
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Are you using the stock LS pump and resi?

If not, what is your resi situation?
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Old 04-03-2019, 01:12 PM   #3 (permalink)
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Yes stock pump and reservoir 04 Silverado 1500
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Old 04-04-2019, 08:35 AM   #4 (permalink)
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No clue on solutions, but some question (I'm assuming you've already been over, but doesn't hurt to double check).

1. Are you running a cooler?
2. Do you have any hard 90 degree angles? I believe these are known to cause cavitation since the flow is disrupted.
3. Have you flushed the entire steering system? I'm guessing there is debris in the system after the failure. Could cause early failure after installing new parts.
4. What size pulley are you running?
5. What type of fluid are you running?
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Old 04-04-2019, 10:27 AM   #5 (permalink)
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Quote:
Originally Posted by GFY Racing View Post
No clue on solutions, but some question (I'm assuming you've already been over, but doesn't hurt to double check).

1. Are you running a cooler?
2. Do you have any hard 90 degree angles? I believe these are known to cause cavitation since the flow is disrupted.
3. Have you flushed the entire steering system? I'm guessing there is debris in the system after the failure. Could cause early failure after installing new parts.
4. What size pulley are you running?
5. What type of fluid are you running?
Yes, these are things we'll need to know to really diagnose the system.

Are you wheeling when these failures occur or street driving? Has the box been flushed? Are you sure the steering box isn't failing and throwing metal shards or seal material into the pump? I had a box that was eating seals and would find them in the lines as long as I didn't try to drive the Jeep after failure.

When the failure happens, does the steering get tight or do you lose only one direction? Is the pump hot when this happens? How does the fluid look? What's in the fluid as far as particles or seal material?
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Old 04-22-2019, 01:28 PM   #6 (permalink)
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Make sure you are using at least AC-Delco OEM fluid. At my work we were having all sorts of failures on 90's model GM's and Dodges with Saginaw steering and hydro-boost, and we cured them by using the Delco part # 10-5073 oem spec fluid.

The relief pistons were sticking in the bores of the pumps, reman and new Mopar/GM. All new lines, boosters and gearbox and added on filters and we were still having problems with the pressure relief sticking until we changed the fluid brand. We were using Johnsen's P.S. fluid.
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