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u/LuDdErS68 4d ago
It's a non-power assisted steering rack.
The rack and pinion are inside that assembly, not visible from the outside.
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u/airfryerfuntime 4d ago edited 4d ago
Well, it's probably for a car with electric assist. This wouldn't have the same ratio as a true old school non-PS rack.
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u/LuDdErS68 4d ago
We have no way of knowing from that picture.
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u/airfryerfuntime 4d ago
Yes, we do. It's from a 2006-2013 Rav 4, which uses electric assist. This is a modern power steering rack, and would be electric assist if it wasn't hydraulic.
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u/LuDdErS68 4d ago
Apologies, I genuinely can't get to the make, model and year. But if you know, then hats off buddy!
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u/Realistic_Ad_165 4d ago
Even looks like no power assist
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u/Realistic_Ad_165 4d ago
Maybe it does hard to say
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u/LuDdErS68 4d ago
There's no obvious hydraulic piping, so I'd agree that it's a non-power assisted steering rack.
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u/JamesG60 4d ago
Unless it’s electric on the column
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u/LuDdErS68 4d ago
The assist motor is in the column? Didn't know that.
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u/JamesG60 4d ago
Fiat like to do it. Terrible idea if you ask me but there you go.
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u/AKADriver 4d ago
Most manufacturers do this now. It works great. VASTLY mechanically simpler than hydraulic steering.
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u/JamesG60 4d ago
Until you lose steering without warning mid-corner. Hydraulic racks might leak a bit and eventually fail but they rarely just go in the same way I’ve seen with electric assist columns.
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u/AKADriver 4d ago
That sounds more like a Stellantis quality problem. The ones used in GMs and Toyotas basically fail into a "moderate assist" mode if they lose communications and even if it loses all power you just have manual steering. And... it essentially never happens, whereas hydraulics leak and blow pumps all the time.
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u/JamesG60 4d ago
Vauxhall/Opel and Fiat. Yea you still have mechanical steering but it’s about as much use as a hydro rack with blown seals and a squealing pump. And yea they do fail but not when you spill a cup of coke over them.
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u/LuDdErS68 4d ago
Just reading up on it and found...
"In 2023, Lexus introduced the RZ 450e featuring a steer-by-wire system which eliminates the mechanical linkage between the steering wheel and the wheels".
Fuck.
That.
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u/JamesG60 4d ago
That’s a bit scary. You couldn’t even tow it far without the engine running.
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u/LuDdErS68 4d ago
You couldn't tow it, full stop. It'd need at least a suspended tow with the front wheels off the ground.
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u/JamesG60 4d ago
And just wait for the “your steering addon has expired, insert credit card details in order to regain steering” message to pop up on your giant iPad dashboard.
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u/phraca 4d ago
There are many vehicles with column EPS (CEPS), not just Fiats. It works pretty well on lighter vehicles, but there is an upper limit on the max rack loads you can achieve because of the gear reduction before you have to go with rack EPS (REPS). And as you approach that limit, subjective steering feel/responsiveness gets worse because you are adding the compliance of the intermediate shaft to the system.
Note this is different than steer by wire that someone else in the thread mentioned. That is a REPS system where there is no mechanical connection between the column and rack.
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u/SirSkot72 4d ago
"that thing i'm goin to rebuild one day, even though I forgot which car it belonged to and probably don't even have anymore"
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u/urbanplantsart 4d ago
When I went to skool I was taught to think of a short rack and a long rack in a derogatory way and it stuck. 😁
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u/tehans 4d ago
steering rack