Howdy folks! Here's the link for Part 2:    • Tesla Large Drive Unit Rebuild (For a...  

In this video, I pull the Tesla Large Drive Unit out of this RAV4 EV and get it torn down for a rebuild.
In this particular case, an internal coolant leak started to cause a buildup of rust/corrosion in the stator housing, which was causing excessive friction to spin the rotor. Thankfully, the corrosion didn't get to a point of causing major loss of voltage isolation in the stator, or worse yet, damage to the inverter electronics.

These motors are VERY prone to coolant intrusion from a leaking rotor coolant seal, which is an all but "inevitable" issue. If you have an LDU equipped vehicle (20122020 Tesla Model S/X RWD and/or Performance, 20122014 Toyota RAV4 EV, or 20142017 Mercedes BClass ED), you should be performing regular inspections of the rotor encoder sensor for signs of coolant (unless of course you have a motor which already has the rotor cooling deleted).

If your EV is in need of service or repair, feel free to get in touch!
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Portland OR, 97220
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