Saturday , 30 May 2020
Home » RC Build Blog - Axial Yeti XL Build » Axial Yeti XL Build – Part 9 – Transmission

Axial Yeti XL Build – Part 9 – Transmission

Axial Yeti XL Build – Part 9 – Transmission

The Build – Part 9
Sitting in the center of this monster is the heart of the Yeti; a beefy 3-gear transmission that includes an external slipper clutch designed to take some major punishment.

Build Notes:
The Yeti comes equipped with a slipper that includes a pair of metal slipper pads as well as a pair of flexible pads. Toss the flexible ones aside; we need the meat of the metal ones for the XL.
Step 1:
Axial Yeti XL Build – Step 104
Before we begin, take a look a the two bearings we’ll be using during this step. The 5×11 bearing on the left will be used on the top and center shaft; the 6×12 bearing on the right will be used on the lower output shaft.
Step 2:
Axial Yeti XL Build – Step 105
Insert a 2×10 pin in the top shaft followed by the top shaft gear. Slide the long plastic spacer over the top shaft and install a 5×11 bearing on each end.
Step 3:
Axial Yeti XL Build – Step 106
Insert a 5×11 bearing on each end of the center idler gear.
Step 4:
Axial Yeti XL Build – Step 107
Insert a 2.5×12 pin into the output shaft followed by the 34T main gear. Slide the short plastic spacer over the output shaft, then install a 6×12 bearing on each end.
Step 5:
Axial Yeti XL Build – Step 108
There is a method to installing the gears into the transmission case, so start by pressing the top shaft into place.
Step 6:
Axial Yeti XL Build – Step 109
Next, press the idler gear into place.
Step 7:
Axial Yeti XL Build – Step 110
Apply a liberal amount of the included grease to the main gear and press the output shaft assembly into place. Rotate the output shaft a few times to spread the grease around. Finally, install the idler gear ‘cap’ and screw in place. Do not overtighten!
Step 8:
Axial Yeti XL Build – Step 111
Mate and screw the two transmission halves together. Make sure the gears and bearing seat correctly before buttoning it all up.
Step 9:
Axial Yeti XL Build – Step 112
Press the rubber plug into place.
Step 10:
Axial Yeti XL Build – Step 113
Attach the plastic motor mount to the transmission.
Step 11:
Axial Yeti XL Build – Step 114
Attach the inner gear cover to the motor mount.
Step 12:
Axial Yeti XL Build – Step 115
Slide the drive cup onto the output shaft and secure with the M4 setscrew. A drop of threadlocker is suggested here.
Step 13:
Axial Yeti XL Build – Step 116
There’s quite a few parts that go into the slipper assembly. I’ve laid them out to show you how everything goes together.
Step 14:
Axial Yeti XL Build – Step 117
Press the plastic spacer into the spur gear and attach both slipper pads. I used a few small drops of black grease to hold the pads to the gear.
Step 15:
Axial Yeti XL Build – Step 119
Pre-compress the slipper spring a few times to settle it in.
Step 16:
Axial Yeti XL Build – Step 118
Slide the inner slipper hub on the top shaft followed by the slipper washer, spur gear assembly, another slipper washer and then the outer slipper hub. Install the plastic spring centering spacer, the slipper spring, a 4×11 washer and the slipper nut.
Step 17:
Axial Yeti XL Build – Step 120
Tighten it down all the way and then back it off until there is about 2mm of thread showing.
Step 18:
Axial Yeti XL Build – Step 121
Assemble the motor mounting plate. It actually goes together in a few different ways but just make sure the screws holes align as shown in the picture.
Step 19:
Axial Yeti XL Build – Step 122
Attach the motor mount plate to the motor. A drop of threadlocker on the screws will help prevent them from coming loose during your ham-fisted playtime.
Step 20:
Axial Yeti XL Build – Step 123
Install the supplied pinion, making it flush with the end of the shaft. We can adjust it, if neede, in the next step. Threadlocker on the set screw is suggested.
Step 21:
Axial Yeti XL Build – Step 124
Slide the motor assembly into the grooves in the motor mount and capture with the plastic cap. Once you’ve set the gear mesh, tighten the screws down good and tight. You can now adjust your pinion in or out to match the spur gear.
Step 22:
Axial Yeti XL Build – Step 125
Install the gear cover.
Step 23:
Axial Yeti XL Build – Step 126
Attach the CVD stub to the slider shaft. Use a dab of threadlocker on the M3 screw.
Step 24:
Axial Yeti XL Build – Step 127
Build this axle like you’ve done with the other CVDs; barrel into the ball, cup over the ball and capture with the pin. Don’t forget the black grease.
Step 25:
Axial Yeti XL Build – Step 128
Slide the CVD assembly into the plastic cap. This cap is used to retain the pin you installed in the last step. Slide this assembly onto the outpt shaft and secure with the M4 set screw. Don’t forget a dab of threadlocker.
Step 26:
Axial Yeti XL Build – Step 129
Slide the CVD slider through the opening in the rear of the chassis. Key the front drive axle to the output shaft on the other side of the transmission and lower into place. Attach the transmission to the chassis with the four M3x30 screws. Screw them in a little at a time until all four are tight.

Awesome job. Give the rear CVD a turn to make sure the drivetrain is rotating freely. There will be a little resistance depending on the motor you are using, but overall it should turn smoothly. Next up, the rear suspension.

Axial Yeti XL Build – Part 1 – Front Differential
Axial Yeti XL Build – Part 2 – Front Gearbox
Axial Yeti XL Build – Part 3 – Rear Differential
Axial Yeti XL Build – Part 4 – Rear Axle
Axial Yeti XL Build – Part 5 – Front Suspension
Axial Yeti XL Build – Part 6 – Steering
Axial Yeti XL Build – Part 7 – Chassis
Axial Yeti XL Build – Part 8 – Electronics
Axial Yeti XL Build – Part 9 – Transmission
Axial Yeti XL Build – Part 10 – Rear Suspension
Axial Yeti XL Build – Part 11 – Shocks
Axial Yeti XL Build – Part 12 – Body, Wheels, Tires

Back to the Axial Yeti XL Build List

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

Yokomo YZ-4 SF 2 4WD Offroad Buggy | CompetitionX

Yokomo YZ-4SF2 4WD Offroad Buggy | CompetitionX

Yokomo has announced a new wheeler to their lineup – the YZ4 SF2! This new …

Leave a Reply

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