Hmm.. something is not adding up here. Mostly Toyota oem remfg parts are the same as new oem parts.
I would talk to the parts rep where you bought it and see what they suggest.
If that's a dead end then Maybe the Toyota regional rep for your area.
Now, is all your parts oem ? With oem rim and tire factory tire sizes?
The reasons I ask is these front ends are known to have Lower ball joint issues as well as steering rack issues.
If folks choose to modify these things with lifts and oversized tires and rims then it Maybe the price we have to pay for doing these mods.
I have been fortunate for over 30 years not having one bad steering rack.
However, I don't off road, lift or run any tires or rims that are not factory spec.
Maybe your like me. I honestly don't know. I just know from experience and observing Toyotas since the 1980s.
Modifying things can majorly shorten component lifetime and cause components to fail.
It also seems the steering racks really prefer their dexron fluid or equivalent. Like other members have mentioned.
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7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread:
https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer:
https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information:
https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html