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Old 03-09-2020, 03:19 PM   #1
yaris9876
 
Drives: yaris hatch 07 640K original m
Join Date: Mar 2007
Location: usa
Posts: 282
steering mods

This is about a 99 sienna Van but its a Toyota and I have a Yaris....640K miles truly.Original all including clutch. But it shudders a little bit..
If I ask about mods on most sites the establishment jack asses always get scared and say dont do mods...stick to stock...they make me sick.Yaris people tend to have guts or they wouldnt have bought a tiny Yaris anyway.
The power steering H pump on the Sienna needs replace. I really would like to change it back to a simpler set up. Pull out the hydraulic ram and just go bck to rack and pinion
with a old style steering box. The hydraulic set up on Siennas is known for failing.
I dont know if those steering boxes have power or not. I know they have oil of some kind.
Has anyone here done any mods on their steering systems???? Can you get a 12v powered steering box that would help turn an offset knuckle like you find on Rack and Pinion.??? I dont know if we have many mechanics on the forum...I hope there are some..
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Old 03-10-2020, 10:03 AM   #2
Brighton
Knower of little
 
Drives: 07 Yaris Hatch
Join Date: Jul 2019
Location: NOVA
Posts: 68
The toyota electric steering systems are oil-less I believe and Toyota likes to keep things modular so you could probably find a complete hydraulic system from an older SUV/Truck in the junkyard. I'd stick with pulling it from a 4Runner, Pickup or Previa? You're in uncharted waters but make sure to get a system rated for about the same weight as a Sienna.
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Old 03-10-2020, 04:35 PM   #3
remcafee
 
Drives: 2007 Toyota Yaris 3 door
Join Date: Sep 2018
Location: Arizona
Posts: 43
So for a 99 sienna you have 2 options, either replace the rack and pinion assembly with a new one (not cheap) or you can bypass power steering all together by looping around the rack lines and get a drive belt with no power steering, only thing is it would be hard to turn standing still
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Old 03-13-2020, 08:03 PM   #4
yaris9876
 
Drives: yaris hatch 07 640K original m
Join Date: Mar 2007
Location: usa
Posts: 282
the stock system is hyd ram..not RP....what do you mean by drive belt?
I see on the net that there are elctric assist steering boxes that will do rack and pinion..and that is a kind of power steering.
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