In this step, were going to be attaching the bulkheads, inner front/rear arm mounts and steering posts.
Most of the screws feed into aluminum parts; again, we would normally use blue threadlocker to help keep the screws in place. This too seems to be a product of discussion regarding possible flex issues. While I would suggest blue threadlocker on any screw going into aluminum, I chose to only use it in certain areas. Those will be called out.
Step 1: The front and rear bulkheads are directional, designated by the A and B printed on them. Another way to check left and right is the 'lip' on the U-part of the bulkhead; that lip should be to the outside of the car.
![](tamiya-trf419xr-chassis-p1.jpg)
Step 2: Attach the left and right bulkheads to the front of the carbon chassis. Note orientation.
![](tamiya-trf419xr-chassis-p2.jpg)
Step 3: The TRF419XR uses 05G front inner arm mounts.
![](tamiya-trf419xr-chassis-p3.jpg)
Step 4: Attach those to the chassis as shown. Blue threadlocker is OK to use here.
![](tamiya-trf419xr-chassis-p4.jpg)
Step 5: Attach the steering posts. Blue threadlocker is OK to use here as well.
![](tamiya-trf419xr-chassis-p5.jpg)
Step 6: Moving to the rear, attach the left and right bulkheads and the XA rear inner arm mounts. Blue threadlocker on the XA mounts is suggested.
![](tamiya-trf419xr-chassis-p6.jpg)
Step 7: Attach the two motor mount halves to the chassis. Note the holes used for attachment. You can add additional screws to change the flex characteristics.
![](tamiya-trf419xr-chassis-p7.jpg)
That was a simple few steps not difficult at all! Clear some space and lets get to Part 2 the rear differential!
Use the links below to follow each step.
Tamiya TRF419XR Touring Car Build Opening Page
Tamiya TRF419XR Touring Car Build Part 1 Chassis/ Bulkheads
Tamiya TRF419XR Touring Car Build Part 2 Rear Differential
Tamiya TRF419XR Touring Car Build Part 3 Driveline
Tamiya TRF419XR Touring Car Build Part 4 Steering
Tamiya TRF419XR Touring Car Build Part 5 Suspension
Tamiya TRF419XR Touring Car Build Part 6 Anti-Roll Bars
Tamiya TRF419XR Touring Car Build Part 7 Shocks
Tamiya TRF419XR Touring Car Build Part 8 Final Assembly