Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
Friday , 24 May 2019

Tamiya TRF419XR Touring Car Build – Part 2 – Rear Differential | CompetitionX

Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX

Like most current touring cars, the Tamiya TRF419XR comes with a front spool and rear gear differential setup. The rear is a sealed unit that accepts any diff fluids; we’ll be building ours with 3K fluid to start.

Build Notes:
As with most differential builds, this could be a messy step if you’re not careful. A covered work area and cleanup rags are highly recommended.
Step 1:
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
To get this step started, grab an outdrive and slide one of the metal bushings over it. Feed it through the diff pulley, then lube and slide the black o-ring over the outdrive and press it down into the pocket. Follow that with the 5×15 shim. Locate and feed the cross pin through the hole in the outdrive, then key and press the sun gear into place. The sun gear should be flush with the end of the outdrive.
Step 2:
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
Step 2 is the same as Step 1, just the differential housing side.
Step 3:
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
Assemble a pair of cross shafts; each should have a pair of satellite gears (facing inward) and a 3×5 shim (on the outside of the gear). Note the cut in the cross shafts.
Step 4:
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
Install both satellite gear assemblies into the diff case; note how the cuts in the cross shafts key together. Rotate the outdrive a couple turns to make sure the gears seat correctly.
Step 5:
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
Fill with fluid. You want to put just enough to reach the top of the satellite gears. Wait a few moments for the bubbles to disappear.
Step 6:
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
You’re going to match the two diff halves together, however you’ll need to make sure the two points shown above line up. These are the ‘key’ points to make sure diff halves mate correctly.
Step 7:
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
Press the gasket into the diff pulley. Mate the two halves together (see Step 6) and secure with the 4 2x8mm screws.
Step 9:
Tamiya TRF419XR Touring Car Build - Part 2 - Rear Differential | CompetitionX
Rear differential done. You can mark the outside of the case with 3K (or whatever you used) for easy reference.

Clean up any excess fluid with a rag and some motor spray, set the diff aside and let’s move to Step 3 – the Driveline.

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

About Tony Phalen

Tony Phalen - As an avid RC enthusiast, Tony has been building, bashing and racing RC Cars for over 25 years. He has raced everything from 1:18th scale trucks to 1:5 scale motorcycles and everything in-between. He's also worked on both sides of the industry fence; working at and with many major manufacturers (as well as being a sponsored driver) to working for a high-profile industry magazine. During this time he has learned many tricks, tips and techniques and has transferred that knowledge to CompetitionX - the most informative RC website on the internet! More articles by Tony Phalen

Check Also

Team Associated RC10B6.1DL Team Kit | CompetitionX

Team Associated RC10B6.1DL Team Kit – Limited Edition | CompetitionX

Team Associated has just dropped another 1:10 scale buggy – the RC10B6.1 DL Team Kit. …

Leave a Reply

Your email address will not be published. Required fields are marked *