Hi guys. First let me explain a little of my history with the Vios. In 2013 I started attending autocross events with my automatic Yaris sedan. I had some basic engine, suspension, and brakes modifications with little racing experience...so I was slow. I always asked questions and adjusted my driving until I was within tenths of the fast guys at the local region. Then one year at nationals there was a K20 civic completely dominating the class, and thats when I decided to build the car for track racing. First it was the 2ZRFE engine swap from a corolla, It was awesome and I ran with that engine for 6 months and won almost every local autox in SMF....until my automatic transmission started limiting the car's potential. This is where the 2zrVios story kicks into high gear, with a manual transmission swap/build...
Before you ask why I painted the case orange, take a look at my car. I'm a big fan of using traditional Toyota livery witch is a set of 3 colors; Yellow, Orange, and Red.
Ask anyone out there that has done a 2zr swap in their Yaris what they noticed first, and they will all tell you "torque". The 2zrfe makes 25ftlbs more than the original 1nzfe in stock form, so the outcome in our 2300lb car is always LOTS of one-tire wheel spin. Now lets discuss what makes the ARtrackbox special. There are two modifications to this proven Toyota C50 that make it a completely different animal than any virgin C50 out there....it has the Cusco Type-RS Limited Slip Differential (unboxing here ) wrapped with a Scion sourced 4.3 Final Drive gear. What that means is, I get full use of every gear in the transmission instead of just first through fourth on a road course. In addition to better acceleration, I also get a full locking differential that will not "unload" like a torsion if I lift a wheel in a turn.
I'm not going to do a full tear-down and assembly write up here, because there are already a few time lapsed videos on YouTube. What I will go over here is what those videos did not cover, taking measurements, inspection, and setting differential bearing preload. Bearings are easy, either they rotate smoothly and quietly or not.
Now lets start with synchronizers, since everyone likes to blame these guys for shifting issues. All of the specifications I retrieved from the Toyota Yaris C50 service manual.
Connect with me