Thinking about deleting the power steering in my 89

90sickfox

Wasn't a pretty sight...and I've got big hands
SN Certified Technician
Mar 2, 2015
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The only thing I had to do was drill the pressure hose side of the volvo pump with ( I believe ) a 3/8 drill bit. The factory pressure line reached the pump and screwed on without issue. It should be in my build thread. I do use European prestone PS fluid in it. No issues.

I used the volvo ump off of a s40 that was in the junk yard. There are a bunch of them out there. The thread on the pressure line is the exact same thread on the volvo pump. The issue is that the mustang line is wider at the tip than the vovlo line. 3/8 bit self centers and drills it out to the correct size. I used grease on the bit to catch any debri.

I'm running on3 and have had the kit for a few years. It's worked well for me. I haven't had any issues other than a couple minor things during install. The original PS pump wasn't in the way but made it harder to get to the oil filter.

I'm going to check into the controller thing. I thought about that but didn't have the time to dissect one.

Lost cause for me. I don't have the vin of the car it came out of. Thought someone would Wright an Arduino to read wheel speed and a circuit to control the motor directy...bypassing the volvo chip. The steering feel is like a BMW ( so it's great for me ). No lag or hard spots. I've never been in a situation, while driving the last couple years, that makes me want to change it. 100% duty would probably be too soft. I run 235/40r18s up front 265/35r18s in the rear. IRS swapped.
 
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TOOLOW91

If you're the village idiot what's that make me?
15 Year Member
Nov 29, 1999
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I’ve done the Volvo pump without the controller . 3 wires and at 70 percent it was enough to run a hydro boost and steering . Just steering it would be fine . I used a wire in the car that was hot key on but not cranking so it didn’t put a load on while starting
 
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Monkeybutt2000

Mustang Master
Aug 11, 2019
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The problem with the on3 kit is it puts the alternator right up against the turbo,which in turn makes you want to look for a different spot for it. The PS location. Unfortunately,you cant drop the PS down because of the forward facing headers. The Volvo ps pump is the best way to rectify the situation. Hopefully it's on my winter mod list.
 

Mstng93SSP

You have a nice rear end there Dave.
15 Year Member
Nov 29, 1999
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The alternator is close to the turbo for sure, but with the turbo blanket it's not an issue. I'm not sure what you mean about drop the PS down? It fits fine with the forward facing headers.

The on3 install was not bad at all. Actually, pretty straight forward. The hardest part was tapping the oil pan for the return line.
 
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Mstng93SSP

You have a nice rear end there Dave.
15 Year Member
Nov 29, 1999
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Monkeybutt2000

Mustang Master
Aug 11, 2019
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The alternator is close to the turbo for sure, but with the turbo blanket it's not an issue. I'm not sure what you mean about drop the PS down? It fits fine with the forward facing headers.

The on3 install was not bad at all. Actually, pretty straight forward. The hardest part was tapping the oil pan for the return line.
There's a few companies that make kits to where you swap the alternator to the driver side,and the ps is below that. This is without AC of course.
 
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The Grudge

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Nov 20, 2022
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Hey, I used a new pump, bracket, pulley and asociated parts from a company called wild horses.
It now handles and performs amazingly and was much easier for me to figure out than the Volvo pump.
This is on my turbo street car with a spool and 15” wide tires and I retained my AC which was a must for me.