How To Rebuild Your MKIII Supra Power Steering Rack and Pinion: A70 S1•E2

[@CARS-N-CAD]

Life saver for those of us with right hand drive racks!

[@BoostRodeo]

I can only imagine. I have been starting to try tracking down some parts for the gt-four and it's already proving to be a challenge

[@FayeHadley]

What a great video!! I was considering rebuilding my spare... you make it look so easy, I am definitely gonna get the proper socket and try it for myself now!!

[@BoostRodeo]

It's a bit of work but not bad at all Faye! Just take your time. The spline socket is the only specialty tool you really need. A subscriber also figured out that zip ties work better than rubber bands for compressing the o-rings.

[@ferasyassin8355]

Use an impact and you dont need that socket at all

[@SamOHalloran]

Didn't really want to do this but my rack is leaking bad. I was going to just send in to Rock Auto, Cardone has a rebuild service, but the internet agrees those rebuild services usually don't do a very good job. So just ordered a seal kit, the last spline socket on ebay (hit me up later if you want to borrow it!), and since I'm saving some money not using the rebuild service, went ahead and ordered a Boostrodeo shirt. Thanks for the video!

[@BoostRodeo]

So glad the video helped! I questioned if it was worth tearing the rack apart again after I had the entire thing back together just to make the video, but hearing that it helped you makes me 100% certain it was work the effort. Thanks for supporting and ordering a shirt, that means the world!

[@nickk3765]

Can I rent the socket?

[@SamOHalloran]

@@nickk3765 I actually sent it on to someone on the forums, but I'll see if he's interested in sending on to you when he's done.

[@jakeusan]

@@SamOHalloran Is the socket back in your possession?

[@dereku4664]

Its been a while but figured id see if you still had this socket? TIA

[@AntonioClaudioMichael]

The gold look came out nice as well as the powder coating

[@ooohry]

this was overall a great video, i'm going through it for a soarer steering rack which seems almost identical but i just want to say youre the MVP for that 5/8 bolt trick. i couldnt find the appropriate hex bit anywhere in town, special order and more than 60$! but after i watched this, 3$ at the local bolt shop and we're in business.

[@BoostRodeo]

Soarer/sc/mkiii/mkiv racks are all pretty similar! Glad it helped! I was in the same situation finding one! If you want to get really fancy weld you can weld the bolt to an old socket 👌

[@ooohry]

@@BoostRodeo wish i had such luck finding that spline tool though. my local dealers dont even have the part #

[@BoostRodeo]

@@ooohry check ebay, there are usually a few on there

[@ooohry]

@@BoostRodeo i found the trick, just my manual is old, tool has a new part # that i can order from toyota :)

[@wadupdockandrew8609]

I do appreciate this video. Thank you for re-dis-assembling for us

[@BoostRodeo]

Thanks! I'm just glad that it has helped some people.

[@Sagwax]

Thank you man I'm about to rebuild the steering rack on my 92 right hand drive twin turbo. This will help a lot

[@BoostRodeo]

Glad it helps! Should be the exact same steps just the rack will be mirrored 👍

[@justinmarch]

Thanks man! Perfect

[@victorpinto9123]

Dont forget electrical tape on the gear side of the shaft, I learned the hard way and ripped the seal as I was inserting it in. Did I vacuum test and it leaked.

[@BoostRodeo]

Very good fallout. Those teeth are sharp and it doesn't take much to damage the seal.

[@Shwalker07]

Nice job. Very well detailed and will be helpful for many.

[@BoostRodeo]

Thanks! Hoping it helps someone else tackle this job themselves.

[@dreamgarage6830]

Thanks so much I didn’t know what to do

[@BoostRodeo]

It's a little intimidating but really isn't that difficult once you figure out a few tricks, hoping this gives more people the confidence to tackle it themselves!

[@scottchelmford7136]

you can use the steering shaft bottom half as a substitute for the kent-moore spine socket btw ;)

[@BoostRodeo]

That's true! I should have mentioned that for people that don't want to get one or can't find one. It it nice to be able to put a ratchet on it to torque it when reassembling though.

[@scottchelmford7136]

@@BoostRodeo for sure, i think you could probably turn the shaft to full lock and loosen it up or potentially torque it properly as well. there is another youtuber who rebuilt the rack in his 1988 mk3 and when he re-assembles it he puts electrical tape on the teeth on the ram..upon taking apart the rack on my 89, there is a visible crack on the seal which i do think happened when it was re-assembled. your vid is a ton of help and just a tip for the future if you decide to re-do this video or do another DIY tutorial on smaller components..use a gopro if you have one. the POV angle would help alot

[@lukebucey5474]

awesome video. I am in the same boat of jz swapping my mk3. my car has pps and so Im very interested for this next video!

[@BoostRodeo]

Should be out soon with the added downtime we have right now!

[@TrenKjay]

Love your videos bro your inspiring in the way you keep it up and your content is dope love it continue !!

[@BoostRodeo]

Thank you so much for the kind words man! Always appreciated and it really helps keep us motivated!

[@sshupra6503]

Hey! Trying to rebuild mine. There is a single spline socket I can find, do you know of any other sockets that would fit or work? Would really rather not spend 100$ on a socket I'll use twice

[@BoostRodeo]

Unfortunately it's a pretty specialized part. SnapOn, Match are going to be $$$ as well. Another option is to use the steering intermediate shaft to keep the rack input from turning. Either take it out of the car or hit up a junkyard and grab one out of another toyota that is the same size. I believe it's's pretty common between most of their midsized cars.

[@sparkspeedshop8320]

What size is the huge Allen socket needed instead of the 5/8 bolt?

[@DaKineGuy]

This is useful! Thank you!

[@BoostRodeo]

Thanks, Hoping it helps someone!

[@AntonioClaudioMichael]

Great rebuild bro

[@BoostRodeo]

Thanks Brother!

[@gabrielmarin4593]

Is there any difference in the parts or process to rebuild a RHD JZA70 rack compared to a USDM MA70? Also, is the rack itself or pump that different between an MA70 and a JZA70? I have an ma70 that the previous owner JZ swapped, and since I first watched your everything you need to know video I’m wondering how compatible the jz pump is with the 7m rack.

[@AntonioClaudioMichael]

Good tutorial

[@Airsoftermason]

Love the video just with i had the ambition to rebuild mine, but i dont really care for the powersteering😂

[@BoostRodeo]

I'm all for going full racecar but with how heavy these cars are I really can't stand the power steering not working. I also drive mine a lot when the weather is nice though.

[@nickk3765]

Does anybody know if the progressive rack rebuild kit is the same as the non-progressive rack? I have one of each I need to rebuild…

[@BoostRodeo]

Toyota has different part numbers for each. Most of the kit is the same though

[@jimcswims]

Boost what’s the spline socket size/tooth?

[@abysalheat]

This is a great tutorial. I will be watching the Rolla series next as I'm building a drift TE72 right now. Do you know any differences in the rebuild between your supra and the AE86?

[@BoostRodeo]

They are pretty similar aside from the wrench sizes needed. Jealous you found an 86 rack for your TE72, I have been looking for one for ours. Is it a Power or Manual rack?

[@abysalheat]

@@BoostRodeo It's a power steering rack i got for free from a friend. It's in rough condition as the bolts holding the drive gear unit in are missing and the outer tie rods are rust welded to the inners

[@AntonioClaudioMichael]

Detroit axle is a great place for diffs

[@BoostRodeo]

They do really high quality work!

[@AntonioClaudioMichael]

@@BoostRodeo yes they do i have got a few axles rebuilt from them

[@BoostRodeo]

@@AntonioClaudioMichael Nice, they are one of the only places I would trust with rebuilding an axle, diff or ps rack.

[@Rob_77]

Howdy again, here are the part numbers for the 3x bearings BEARING(FOR POWER STEERING CONTROL VALVE) - 90363-19002 BEARING(FOR POWER STEERING CONTROL VALVE CENTER) - 90363-30054 BEARING(FOR POWER STEERING CONTROL VALVE LOWER) - 90363-12008

[@Rob_77]

Non original replacements for 90363-12008 are, NACHI 63012NSE9C3 NACHI 63012NSE9CM

[@BoostRodeo]

@@Rob_77 Awesome! It looks like 2 out of the three are still available from Toyota. Not sure why I could not find them or the local dealer. Thanks for the info! I'll add it to the description for others.

[@artemkvas2246]

Hey there, just saw the whole tutorial of the rack and pinion getting replaced. And I had a few questions. I have a 1994 MK4 Supra and I’m wondering if there rack and pinion, gearbox or steering gear are the same as on the MK3’s? So I’m running to power steering issues as well. I just replaced my power steering pump, I bled the air out made sure there wasn’t anymore of that weird noise the toll it around the block. Right before I even took the first turn my power steering went out again. It worked for like 0.5 miles till my steering felt very hard to turn. As if there isn’t any. Do you think it’s the rack and pinion issue? Or the power steering pump went out again? What ever it is I’m lost and need some help.

[@BoostRodeo]

The racks are very similar l. First thing I would check is if the reservoir is clean. There is a screen inside that can get a layer of dirt and sludge on it and starves the pump for fluid. Drain the reservoir and look inside with a flashlight. Clean it by flushing with carb cleaner if dirty. Next I would make sure that the progressive power steering solenoid in the rack is plugged in if your car has it. Then check both the resistance of the solenoid and voltage from the pps ecu. The TSRM will have instructions for all this. If all that checks out I would do a system pressure check (also in tsrm or this video kzbin.info/www/bejne/n3jRn3mjZ5mHlcU ) and vaccum check the rack to see if the seals are good. Hope that helps!

[@artemkvas2246]

BoostRodeo I replaced the power steering reservoir to a mishimoto one, so it’s brand new. Also I think my power steering rack is not leaking cuz I don’t see any ATF leaking out from the cvboots. The progressive power steering solenoid is also plugged in, but your saying I could check if it works with a battery to test it?

[@BoostRodeo]

@@artemkvas2246 that is one option but don't put 12v to it. Use a 9v or 6v battery if you have one and only connect it for a few seconds at a time to see if the steering feel changes. The solenoid only operates on 0-5v so using 12v or even 9v prolonged can burn it out. You can also check the solenoid itself. It should have 6-11 ohms of resistance between the two connector pins. The pps ecu can also be checked with a multimeter. It should put out around a very small amount of voltage when not moving and above 37mph should drop off to almost nothing.

[@artemkvas2246]

BoostRodeo Ok I’m starting to understand this a little more, but have a few more questions. What is the 6-11 ohms of resistance? What do you mean by “ohms”? between the two connector pins. And also where is the pps ecu located for me to test the voltage on it when the car is running at idle.

[@BoostRodeo]

@@artemkvas2246 do you have a multimeter? Ohms is a measure of resistance. The two wires coming off the solenoid on the rack should measure somewhere in between 6 and 11 when y tested with a multimeter. That will tell you that the solenoid has not shorted out or the windings shot. This link should help, there is a whole section on the steering system and troubleshooting. www.shoarmateam.nl/content/mkiv-supra-tsrm/

[@Joolian.r]

Would you say that there is an area where you can adjust the slop in the steering rack? On some cars i've seen you can adjust that large bolt tighter to adjust the slack. Does the supra rack do the same?

[@BoostRodeo]

So the preload on the pinion nut under the large cap is meant to do that. Setting it correctly should set the mesh on the gears to create zero slop unless they are heavily worn. The bearings and teflon guide for the main rod also are things that could cause issues with play if they are really worn.

[@Joolian.r]

@@BoostRodeo thank you for the details I'll have a look at everything on mine

[@Joolian.r]

​@@BoostRodeoI'm having an issue where I have tons of side to side play in my rack (nothing wrong with the steering shaft). I tried tightening the nut but that only made the steering stiffer but didn't remove the slop. I noticed all the rebuild kits are just seals, mine doesn't leak. What kind of rebuild kit would I be able to buy for an issue like this?

[@scottchelmford7136]

Which direction did you put the seals in?

[@BoostRodeo]

The tension spring side always goes towards the fluid, or flat side out

[@scottchelmford7136]

@@BoostRodeo got it, thanks dude.

[@BoostRodeo]

@@scottchelmford7136 anytime👍

[@kando3670]

Can you not buy one of these already rebuilt or are they no longer available? Looking forward to the MK3 content during the winter!

[@BoostRodeo]

Last I checked Toyota did not have any left and I went through headaches with two rebuilt racks from the standard parts stores that were horrible. Also I was able to get a brand new toyota rebuild kit so this way all the parts are high quality genuine Toyota and I know exactly how everything was cleaned and prepped. If you don't want to tackle it yourself then Detroit Axle is the only one I would recommend to for rebuilds.

[@hafcinema7342]

Appreciate the knowledge on this vid! I recently did a rebuild on mine & when I put fluid in it, it just poured out the driver and passenger side boots when I bleed the system?! Any reason for that happening. I went by the TRSM & still came out with no dice...

[@BoostRodeo]

Were there any burs on the rack piston ends or teeth? It sounds like your oil seals on both sides were damaged. It could also happen if the pump is not regulating pressure correctly and is pushing fluid past the seals. There is a way to rig up a guage and check that. In this video I show how to do it. kzbin.info/www/bejne/n3jRn3mjZ5mHlcU

[@hafcinema7342]

Yea there where some sleight burns I would say on the teeth but nothing I though was irregular, & yes it is pouring from both side having me feel like the pump has something to do with it as you stated! I’ll check the video you linked in the message thank you for messaging me back really appreciate it!

[@BoostRodeo]

@@hafcinema7342 Absolutely, hope you get it sorted and feel free to reach out if you get stuck and need to bounce ideas off someone. IG messaging is the fastest way to get at us.

[@hafcinema7342]

Right on appreciate it.

[@384058]

@@hafcinema7342 What was your end issue? I just got mine back together and the fluid is pouring out both end seals. Fairly positive I installed the seals properly and they aren't damaged.

[@Adrian_Supra]

Definitely going to need a glass of Bourbon lol

[@BoostRodeo]

Probably the most important thing so you don't throw it across the room 😂

[@traingeek2000]

What sensors/input does the PPS rack need to run? I've got a '91 turbo so I assume I've got it. Speedometer doesn't work so I doubt PPS has the necessary input to run.

[@BoostRodeo]

The PPS ecu does use a speed input but it gets it from the rear abs sensors so it should still work even if your speedo doesn't. Does the powersteering feel fairly light at low speeds but stiffer at 60-70+ mph?

[@traingeek2000]

@@BoostRodeo Not noticeably. My ABS light is also on, so I wouldn't be surprised if that's an issue as well. Also, I didn't notice any wires going to my rear knuckles, I thought only the fronts had speed sensors.

[@BoostRodeo]

@@traingeek2000 Definitely could be. ABS lights in these cars can be painful to track down in these cars from my experience. I chased an ABS light throwing a bad ground code for like a year on my other MKIII before I got it resolved.

[@mekuable]

Will this kit fit on a 92 jza70?

[@BoostRodeo]

The RHD racks are a mirror of the LHD one. All the seals inside are the same and a kit should work for either.

[@mekuable]

@@BoostRodeo thanks a lot friend. Keep up the good work 👍

[@BoostRodeo]

@@mekuable anytime!

[@irish7m-squad743]

Hey BoostRodeo where did you find your new rack and pinion?

[@BoostRodeo]

There are no new ones in existence unless you get really lucky and fine someone who bought one from Toyota and never installed it. Most of the parts chains carry rebuilt ones although I would only recommend getting one from Detroit Axle if you go that route. Or you can rebuild your current one which is what I did.

[@CTOhio]

@@BoostRodeo Y U M

[@CTOhio]

Lol awesome the pocket comment gets some love 👌🏾. But first time viewing your channel . Great content very informative.

[@garethlloyd1264]

Does anyone know if a jza80 streeing rack rebuild kit will work for a jzz30 soarer rack?

[@BoostRodeo]

Should be, suspension, tie rods, subframe etc is the same.

[@RichardWeapons]

Yes, all the front suspension components are the same between Z30 and A80.

[@mod7mgt35r2]

Love ur soup.

[@BoostRodeo]

Thank you! Appreciate that🙏

[@ammoking6099]

Can I pay you to rebuild mine?

[@Nperez1986]

Wish I could see from a better angle :/

[@masterv2118]

hola from GrindHard.. sub'd just so I could claim 690 spot.. lol

[@BoostRodeo]

Thanks For Checking Out The Channel!

[@RichardWeapons]

Thanks for the vid. About to rebuild mine. -DegreE_v.2.0 🤙

[@BoostRodeo]

Glad it was helpful!