From WeberAuto.

Check out the modular components and design of the electric motors on the Tesla Models 3 and Y. See how many parts are common and interchangeable.

Corrections:
1. I swapped the definition of a Hunting gear set with a Non-Hunting gear set.

TIMELINE:
0:00 Introduction
0:27 The rear motor of the Model 3 and Y
1:08 The input shaft with 31 teeth (Prime Number)
2:00 the input shaft SKF bearings for a rotor speed of 18,447 at 262 km/h (163 mph)
2:40 The countershaft and gear with 81 teeth (Factors 3, 3, 3, 3)
3:00 The input shaft to the countershaft gear ratio of 81/31 = 2.6129:1
3:10 The countershaft pinion gear with 24 teeth (Factors 2, 2, 2, 3)
3:15 The ring gear and differential case with 83 teeth (Prime Number)
4:30 The countershaft to ring gear ratio of 83/24 = 3.4583:1
4:43 The overall gear ratio = (81/31) x (83/24) = 9.0363:1
5:03 The published gear ratio is incorrect. This is a Hunting Gearset
5:48 The CV half-shafts connect to the differential side gears
6:46 MUST SEE: two cool Permanent Magnet rotor demonstrations
8:05 The modular design of the motor shafts and rotors
8:25 MUST SEE: Watch as a rear motor is changed into a front motor
10:32 The differences in the modular motors
11:35 See what a permanent magnet does to the Induction Rotor
11:55 An aluminum core front induction rotor on the Model Y
12:13 There are at least three different rotors for the Models 3 and Y
13:54 See the rear motor inverter and where it attaches to the rear housing
14:45 The matching part numbers of the rear inverter and the stator (A matched set)
15:15 The three different power and torque levels of the Model 3 and Model Y
16:15 MUST SEE: See the front motor inverter attached to the rear housing!
17:37 the common bolt pattern and opening for the stator housings
18:30 The oil-cooled stator and ATF-9 fluid
18:47 The interchangeable transmission heat exchanger
19:13 The interchangeable variable speed electric oil pump
20:25 The interchangeable spin-on oil filter
21:06 What is not interchangeable between models
21:20 The rear drive-unit is mounted parallel with the ground
22:20 The front drive-unit is mounted upside down and on an angle
23:05 The matching part numbers of the front inverter and the stator (A matched set)
26:30 Additional EV training opportunities at https://www.weber.edu/evtraining
26:58 Video summary and donation opportunity

I have nothing to prove this, but while looking at used Model 3 motors for sale on eBay, I gathered the following information. There are three different part numbers for the combined rear motor inverters and stators. Stators can have different milli-ohm resistance values and still appear identical.
* 1120970-00-D (24 SiC IGBT modules Based RWD model 3)
* 1120980-00-C, D, F (24 SiC MOSFET modules Performance AWD model 3)
* 1120990-00-F (18 SiC MOSFET modules Non-Performance AWD model 3)

ABOUT US
Weber State University (WSU) Davis Campus – Automotive Technology Department – Advanced Vehicles Lab. A technical description and operational demonstration of the Tesla Model S Rear Drive Unit (RDU) and Fear Drive Unit (FDU).

We teach current vehicle technologies to our automotive students at Weber State University and online. For more information visit: http://www.weber.edu/automotive

This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see http://www.weber.edu/automotive/J_Kelly.html

Visit my other youtube channel https://www.youtube.com/user/vibratesoftware to see the amazing NVH app for vibration diagnosis!

ADDITIONAL TRAINING FOR YOU
Join us for hybrid and electric vehicle training with two online courses and in a 5-day on-campus boot camp with Professor John D. Kelly. See http://www.weber.edu/evtraining

DONATE TO OUR DEPARTMENT
Please consider a donation to the Department of Automotive Technology at Weber State University here: http://advancement.weber.edu/Automotive

QUESTIONS FOR TEACHERS
1.